1:<\/strong>\u00a0C\u00f3 c\u00e1c lo\u1ea1i m\u00f4i tr\u01b0\u1eddng ph\u1ed5 bi\u1ebfn l\u00e0:<\/p>\n

A.\u00a0<\/strong>m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc, m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n, m\u00f4i tr\u01b0\u1eddng sinh v\u1eadt.<\/p>\n

\nB.<\/strong>m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc, m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n, m\u00f4i tr\u01b0\u1eddng b\u00ean trong.<\/p>\n

\nC.<\/strong>m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc, m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n, m\u00f4i tr\u01b0\u1eddng ngo\u00e0i.<\/p>\n

\nD.<\/strong>m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc ng\u1ecdt, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc m\u1eb7n v\u00e0 m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n.<\/p>\n

2:<\/strong>\u00a0C\u00f3 c\u00e1c nh\u00f3m nh\u00e2n t\u1ed1 sinh th\u00e1i l\u00e0<\/p>\n

A.\u00a0<\/strong>nh\u00e2n t\u1ed1 v\u00f4 sinh, nh\u00e2n t\u1ed1 h\u1eefu sinh, nh\u00e2n t\u1ed1 sinh v\u1eadt.<\/p>\n

\nB.<\/strong>nh\u00e2n t\u1ed1 v\u00f4 sinh, nh\u00e2n t\u1ed1 h\u1eefu sinh, nh\u00e2n t\u1ed1 con ng\u01b0\u1eddi.<\/p>\n

\nC.<\/strong>nh\u00e2n t\u1ed1 v\u00f4 sinh, nh\u00e2n t\u1ed1 h\u1eefu sinh, nh\u00e2n t\u1ed1 ngo\u1ea1i c\u1ea3nh.<\/p>\n

\nD.<\/strong>nh\u00e2n t\u1ed1 v\u00f4 sinh, nh\u00e2n t\u1ed1 h\u1eefu sinh.<\/p>\n

3:<\/strong>\u00a0C\u00e1 r\u00f4 phi nu\u00f4i \u1edf Vi\u1ec7t Nam c\u00f3 c\u00e1c gi\u00e1 tr\u1ecb gi\u1edbi h\u1ea1n d\u01b0\u1edbi v\u00e0 gi\u1edbi h\u1ea1n tr\u00ean v\u1ec1 nhi\u1ec7t \u0111\u1ed9 l\u1ea7n l\u01b0\u1ee3t l\u00e0 5,6^{0<\/sup>C v\u00e0 42^{0<\/sup>
\nC.Kho\u1ea3ng gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 t\u1eeb 5,6^{0<\/sup>C \u0111\u1ebfn 42^{0<\/sup>C \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0<\/p>\n}}}}

4:<\/strong>\u00a0N\u01a1i \u1edf c\u1ee7a c\u00e1c lo\u00e0i l\u00e0<\/p>\n

A.\u00a0<\/strong>\u0111\u1ecba \u0111i\u1ec3m c\u01b0 tr\u00fa c\u1ee7a ch\u00fang.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>\u0111\u1ecba \u0111i\u1ec3m sinh s\u1ea3n c\u1ee7a ch\u00fang.<\/p>\n

\nC.<\/strong>\u0111\u1ecba \u0111i\u1ec3m th\u00edch nghi c\u1ee7a ch\u00fang.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>\u0111\u1ecba \u0111i\u1ec3m dinh d\u01b0\u1ee1ng c\u1ee7a ch\u00fang.<\/p>\n

5:<\/strong>\u00a0Nh\u00f3m sinh v\u1eadt n\u00e0o d\u01b0\u1edbi \u0111\u00e2y c\u00f3 nhi\u1ec7t \u0111\u1ed9 c\u01a1 th\u1ec3\u00a0kh\u00f4ng<\/strong>\u00a0bi\u1ebfn \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng?<\/p>\n

\n
A.\u00a0<\/strong>L\u01b0\u1ee1ng c\u01b0.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>C\u00e1 x\u01b0\u01a1ng.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0C.<\/strong>Th\u00fa.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>B\u00f2 s\u00e1t.<\/p>\n
6:<\/strong>\u00a0\u0110\u1ed1i v\u1edbi m\u1ed7i nh\u00e2n t\u1ed1 sinh th\u00e1i th\u00ec kho\u1ea3ng thu\u1eadn l\u1ee3i l\u00e0 kho\u1ea3ng gi\u00e1 tr\u1ecb c\u1ee7a nh\u00e2n t\u1ed1 sinh th\u00e1i m\u00e0 \u1edf \u0111\u00f3 sinh v\u1eadt<\/p>\n
A.\u00a0<\/strong>ph\u00e1t tri\u1ec3n thu\u1eadn l\u1ee3i nh\u1ea5t.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>c\u00f3 s\u1ee9c s\u1ed1ng trung b\u00ecnh.<\/p>\n

\nC.<\/strong>c\u00f3 s\u1ee9c s\u1ed1ng gi\u1ea3m d\u1ea7n.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>ch\u1ebft h\u00e0ng lo\u1ea1t.<\/p>\n
7:<\/strong>\u00a0\u0110\u1ed9ng v\u1eadt h\u1eb1ng nhi\u1ec7t (\u0111\u1ed3ng nhi\u1ec7t) s\u1ed1ng \u1edf v\u00f9ng \u00f4n \u0111\u1edbi l\u1ea1nh c\u00f3<\/p>\n
A.\u00a0<\/strong>c\u00e1c ph\u1ea7n th\u00f2 ra (tai, \u0111u\u00f4i) to ra, c\u00f2n k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 l\u1edbn h\u01a1n so v\u1edbi nh\u1eefng lo\u00e0i t\u01b0\u01a1ng t\u1ef1 s\u1ed1ng \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi.<\/p>\n

\nB.<\/strong>c\u00e1c ph\u1ea7n th\u00f2 ra (tai, \u0111u\u00f4i) nh\u1ecf l\u1ea1i, c\u00f2n k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 nh\u1ecf h\u01a1n so v\u1edbi nh\u1eefng lo\u00e0i t\u01b0\u01a1ng t\u1ef1 s\u1ed1ng \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi.<\/p>\n

\nC.<\/strong>c\u00e1c ph\u1ea7n th\u00f2 ra (tai, \u0111u\u00f4i) nh\u1ecf l\u1ea1i, c\u00f2n k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 l\u1ea1i l\u1edbn h\u01a1n so v\u1edbi nh\u1eefng lo\u00e0i t\u01b0\u01a1ng t\u1ef1 s\u1ed1ng \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi.<\/p>\n
\n
D.<\/strong>c\u00e1c ph\u1ea7n th\u00f2 ra (tai, \u0111u\u00f4i) to ra, c\u00f2n k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 nh\u1ecf h\u01a1n so v\u1edbi nh\u1eefng lo\u00e0i t\u01b0\u01a1ng t\u1ef1 s\u1ed1ng \u1edf v\u00f9ng nhi\u1ec7t \u0111\u1edbi.<\/p>\n
8:<\/strong>\u00a0C\u00e0ng l\u00ean ph\u00eda B\u1eafc, k\u00edch th\u01b0\u1edbc c\u00e1c ph\u1ea7n th\u00f2 ra ngo\u00e0i c\u01a1 th\u1ec3 c\u1ee7a \u0111\u1ed9ng v\u1eadt c\u00e0ng thu nh\u1ecf l\u1ea1i (tai, chi, \u0111u\u00f4i, m\u1ecf\u2026). V\u00ed d\u1ee5: tai th\u1ecf Ch\u00e2u \u00c2u v\u00e0 Li\u00ean X\u00f4 c\u0169, ng\u1eafn h\u01a1n tai th\u1ecf Ch\u00e2u Phi. Hi\u1ec7n t\u01b0\u1ee3ng tr\u00ean ph\u1ea3n \u00e1nh \u1ea3nh h\u01b0\u1edfng c\u1ee7a nh\u00e2n t\u1ed1 sinh th\u00e1i n\u00e0o l\u00ean c\u01a1 th\u1ec3 s\u1ed1ng c\u1ee7a sinh v\u1eadt?<\/p>\n
A.\u00a0<\/strong>K\u1ebb th\u00f9.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>\u00c1nh s\u00e1ng.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nC.<\/strong>Nhi\u1ec7t \u0111\u1ed9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>Th\u1ee9c \u0103n.<\/p>\n
9:<\/strong>\u00a0Ch\u1ecdn c\u00e2u\u00a0sai<\/strong>\u00a0trong c\u00e1c c\u00e2u sau:<\/p>\n
A.\u00a0<\/strong>Nh\u00e2n t\u1ed1 sinh th\u00e1i l\u00e0 t\u1ea5t c\u1ea3 c\u00e1c y\u1ebfu t\u1ed1 c\u1ee7a m\u00f4i tr\u01b0\u1eddng t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp ho\u1eb7c gi\u00e1n ti\u1ebfp t\u1edbi sinh v\u1eadt.<\/p>\n

\nB.<\/strong>Gi\u1edbi h\u1ea1n sinh th\u00e1i l\u00e0 gi\u1edbi h\u1ea1n ch\u1ecbu \u0111\u1ef1ng c\u1ee7a c\u01a1 th\u1ec3 sinh v\u1eadt \u0111\u1ed1i v\u1edbi m\u1ed9t nh\u00e2n t\u1ed1 sinh th\u00e1i nh\u1ea5t \u0111\u1ecbnh.<\/p>\n

\nC.<\/strong>Sinh v\u1eadt kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 sinh th\u00e1i.<\/p>\n

\nD.<\/strong>C\u00e1c nh\u00e2n t\u1ed1 sinh th\u00e1i \u0111\u01b0\u1ee3c chia th\u00e0nh 2 nh\u00f3m l\u00e0 nh\u00f3m nh\u00e2n t\u1ed1 v\u00f4 sinh v\u00e0 nh\u00f3m nh\u00e2n t\u1ed1 h\u1eefu sinh.<\/p>\n
10:<\/strong>\u00a0T\u1eadp h\u1ee3p sinh v\u1eadt n\u00e0o sau \u0111\u00e2y g\u1ecdi l\u00e0 qu\u1ea7n th\u1ec3?<\/p>\n
A.\u00a0<\/strong>T\u1eadp h\u1ee3p c\u00e1 s\u1ed1ng trong H\u1ed3 T\u1ecbnh T\u00e2m.<\/p>\n

\nB.<\/strong>T\u1eadp h\u1ee3p c\u00e1 C\u00f3c s\u1ed1ng trong V\u01b0\u1eddn Qu\u1ed1c Gia Tam \u0110\u1ea3o.<\/p>\n

\nC.<\/strong>T\u1eadp h\u1ee3p c\u00e2y th\u00e2n leo trong r\u1eebng m\u01b0a nhi\u1ec7t \u0111\u1edbi.<\/p>\n

\nD.<\/strong>T\u1eadp h\u1ee3p c\u1ecf d\u1ea1i tr\u00ean m\u1ed9t c\u00e1nh \u0111\u1ed3ng.<\/p>\n
11:<\/strong>\u00a0. T\u1eadp h\u1ee3p nh\u1eefng sinh v\u1eadt n\u00e0o d\u01b0\u1edbi \u0111\u00e2y \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t qu\u1ea7n th\u1ec3 giao ph\u1ed1i?<\/p>\n
A.\u00a0<\/strong>Nh\u1eefng con m\u1ed1i s\u1ed1ng trong m\u1ed9t t\u1ed5 m\u1ed1i \u1edf ch\u00e2n \u0111\u00ea.<\/p>\n

\nB.<\/strong>Nh\u1eefng con g\u00e0 tr\u1ed1ng v\u00e0 g\u00e0 m\u00e1i nh\u1ed1t \u1edf m\u1ed9t g\u00f3c ch\u1ee3.<\/p>\n

\nC.<\/strong>Nh\u1eefng con ong th\u1ee3 l\u1ea5y m\u1eadt \u1edf m\u1ed9t v\u01b0\u1eddn hoa.<\/p>\n

\nD.<\/strong>Nh\u1eefng con c\u00e1 s\u1ed1ng trong m\u1ed9t c\u00e1i h\u1ed3.<\/p>\n
12:<\/strong>\u00a0M\u1ed9t s\u1ed1 c\u00e2y c\u00f9ng lo\u00e0i s\u1ed1ng g\u1ea7n nhau c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng r\u1ec5 c\u1ee7a ch\u00fang n\u1ed1i v\u1edbi nhau. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y th\u1ec3 hi\u1ec7n \u1edf m\u1ed1i quan h\u1ec7<\/p>\n
A.\u00a0<\/strong>c\u1ea1nh tranh c\u00f9ng lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>h\u1ed7 tr\u1ee3 kh\u00e1c lo\u00e0i.<\/p>\n
C.<\/strong>c\u1ed9ng sinh.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>h\u1ed7 tr\u1ee3 c\u00f9ng lo\u00e0i.<\/p>\n
13:<\/strong>\u00a0S\u1ef1 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 sinh v\u1eadt c\u00f3 th\u1ec3 d\u1eabn t\u1edbi<\/p>\n
A.\u00a0<\/strong>gi\u1ea3m k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u.<\/p>\n

\nB.<\/strong>t\u0103ng k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 t\u1edbi m\u1ee9c t\u1ed1i \u0111a.<\/p>\n

\nC.<\/strong>duy tr\u00ec s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 \u1edf m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p.<\/p>\n

\nD.<\/strong>ti\u00eau di\u1ec7t l\u1eabn nhau gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3, l\u00e0m cho qu\u1ea7n th\u1ec3 b\u1ecb di\u1ec7t vong.<\/p>\n
14:<\/strong>\u00a0N\u1ebfu m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 c\u1ee7a m\u1ed9t qu\u1ea7n th\u1ec3 sinh v\u1eadt t\u0103ng qu\u00e1 m\u1ee9c t\u1ed1i \u0111a th\u00ec<\/p>\n
A.\u00a0<\/strong>s\u1ef1 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 t\u0103ng l\u00ean.<\/p>\n

\nB.<\/strong>s\u1ef1 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 gi\u1ea3m xu\u1ed1ng.<\/p>\n

\nC.<\/strong>s\u1ef1 h\u1ed7 tr\u1ee3 gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 t\u0103ng l\u00ean.<\/p>\n

\nD.<\/strong>s\u1ef1 xu\u1ea5t c\u01b0 c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 gi\u1ea3m t\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u.<\/p>\n
15:<\/strong>\u00a0\u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y\u00a0kh\u00f4ng<\/strong>\u00a0\u0111\u00fang v\u1edbi vai tr\u00f2 c\u1ee7a quan h\u1ec7 h\u1ed7 tr\u1ee3?<\/p>\n
A.\u00a0<\/strong>\u0110\u1ea3m b\u1ea3o cho qu\u1ea7n th\u1ec3 t\u1ed3n t\u1ea1i \u1ed5n \u0111\u1ecbnh.<\/p>\n

\nB.<\/strong>Khai th\u00e1c t\u1ed1i \u01b0u ngu\u1ed3n s\u1ed1ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\nC.<\/strong>Hi\u1ec7n t\u01b0\u1ee3ng t\u1ef1 t\u1ec9a th\u01b0a.<\/p>\n

\nD.<\/strong>L\u00e0m t\u0103ng kh\u1ea3 n\u0103ng s\u1ed1ng s\u00f3t v\u00e0 sinh s\u1ea3n c\u1ee7a c\u00e1c c\u00e1 th\u1ec3.<\/p>\n
16:<\/strong>\u00a0\u0102n th\u1ecbt \u0111\u1ed3ng lo\u1ea1i x\u1ea3y ra ch\u1ee7 y\u1ebfu do<\/p>\n
A.\u00a0<\/strong>t\u1eadp t\u00ednh c\u1ee7a lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>con non kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ed1 m\u1eb9 ch\u0103m s\u00f3c.<\/p>\n

\nC.<\/strong>m\u1eadt \u0111\u1ed9 c\u1ee7a qu\u1ea7n th\u1ec3 t\u0103ng.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>qu\u00e1 thi\u1ebfu th\u1ee9c \u0103n.<\/p>\n
17:<\/strong>\u00a0S\u1ef1 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 c\u00f9ng lo\u00e0i s\u1ebd l\u00e0m:<\/p>\n
A.\u00a0<\/strong>t\u0103ng s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3, t\u0103ng c\u01b0\u1eddng hi\u1ec7u qu\u1ea3 nh\u00f3m.<\/p>\n

\nB.<\/strong>gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3 \u0111\u1ea3m b\u1ea3o cho s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3 t\u01b0\u01a1ng \u1ee9ng v\u1edbi kh\u1ea3 n\u0103ng cung c\u1ea5p ngu\u1ed3n s\u1ed1ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\nC.<\/strong>suy tho\u00e1i qu\u1ea7n th\u1ec3 do c\u00e1c c\u00e1 th\u1ec3 c\u00f9ng lo\u00e0i ti\u00eau di\u1ec7t l\u1eabn nhau.<\/p>\n

\nD.<\/strong>t\u0103ng m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3, khai th\u00e1c t\u1ed1i \u0111a ngu\u1ed3n s\u1ed1ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n
18:<\/strong>\u00a0T\u1ec9 l\u1ec7 gi\u1eefa s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 \u0111\u1ef1c v\u00e0 c\u00e1 th\u1ec3 c\u00e1i \u1edf m\u1ed9t qu\u1ea7n th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0<\/p>\n
A.\u00a0<\/strong>ph\u00e2n ho\u00e1 gi\u1edbi t\u00ednh.<\/p>\n

\nB.<\/strong>t\u1ec9 l\u1ec7 \u0111\u1ef1c:c\u00e1i (t\u1ec9 l\u1ec7 gi\u1edbi t\u00ednh) ho\u1eb7c c\u1ea5u tr\u00fac gi\u1edbi t\u00ednh.<\/p>\n

\nC.<\/strong>t\u1ec9 l\u1ec7 ph\u00e2n ho\u00e1.<\/p>\n

\nD.<\/strong>ph\u00e2n b\u1ed1 gi\u1edbi t\u00ednh.<\/p>\n
19:<\/strong>\u00a0Tu\u1ed5i sinh th\u00e1i l\u00e0<\/p>\n
A.\u00a0<\/strong>tu\u1ed5i th\u1ecd t\u1ed1i \u0111a c\u1ee7a lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>tu\u1ed5i b\u00ecnh qu\u1ea7n c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

\nC.<\/strong>th\u1eddi gian s\u1ed1ng th\u1ef1c t\u1ebf c\u1ee7a c\u00e1 th\u1ec3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>tu\u1ed5i th\u1ecd do m\u00f4i tr\u01b0\u1eddng quy\u1ebft \u0111\u1ecbnh.<\/p>\n
20:<\/strong>\u00a0Kho\u1ea3ng th\u1eddi gian s\u1ed1ng c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi c\u1ee7a m\u1ed9t c\u00e1 th\u1ec3 t\u00ednh t\u1eeb l\u00fac c\u00e1 th\u1ec3 \u0111\u01b0\u1ee3c sinh ra cho \u0111\u1ebfn khi n\u00f3 ch\u1ebft do gi\u00e0 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0<\/p>\n
<\/div>\n
A.\u00a0<\/strong>tu\u1ed5i sinh th\u00e1i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>tu\u1ed5i sinh l\u00ed.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nC.<\/strong>tu\u1ed5i trung b\u00ecnh.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>tu\u1ed5i qu\u1ea7n th\u1ec3.<\/p>\n
21:<\/strong>\u00a0Khi \u0111\u00e1nh b\u1eaft c\u00e1 c\u00e0ng \u0111\u01b0\u1ee3c nhi\u1ec1u con non th\u00ec n\u00ean<\/p>\n
A.\u00a0<\/strong>ti\u1ebfp t\u1ee5c, v\u00ec qu\u1ea7n th\u1ec3 \u1edf tr\u1ea1ng th\u00e1i tr\u1ebb.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>d\u1eebng ngay, n\u1ebfu kh\u00f4ng s\u1ebd c\u1ea1n ki\u1ec7t.<\/p>\n

\nC.<\/strong>h\u1ea1n ch\u1ebf, v\u00ec qu\u1ea7n th\u1ec3 s\u1ebd suy tho\u00e1i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>t\u0103ng c\u01b0\u1eddng \u0111\u00e1nh v\u00ec qu\u1ea7n th\u1ec3 \u0111ang \u1ed5n \u0111\u1ecbnh.<\/p>\n
22:<\/strong>\u00a0\u00dd ngh\u0129a sinh th\u00e1i c\u1ee7a ki\u1ec3u ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 l\u00e0<\/p>\n
A.\u00a0<\/strong>l\u00e0m gi\u1ea3m m\u1ee9c \u0111\u1ed9 c\u1ea1nh tranh gi\u1eefa c\u00e1c c\u00e1 th\u1ec3.<\/p>\n

\nB.<\/strong>l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 tr\u01b0\u1edbc c\u00e1c \u0111i\u1ec1u ki\u1ec7n b\u1ea5t l\u1ee3i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\nC.<\/strong>duy tr\u00ec m\u1eadt \u0111\u1ed9 h\u1ee3p l\u00ed c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

\nD.<\/strong>t\u1ea1o s\u1ef1 c\u00e2n b\u1eb1ng v\u1ec1 t\u1ec9 l\u1ec7 sinh s\u1ea3n v\u00e0 t\u1ec9 l\u1ec7 t\u1eed vong c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n
23:<\/strong>\u00a0Ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3 th\u01b0\u1eddng g\u1eb7p khi<\/p>\n
A.\u00a0<\/strong>\u0111i\u1ec1u ki\u1ec7n s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 c\u1ea1nh tranh gay g\u1eaft gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3.<\/p>\n

\nB.<\/strong>\u0111i\u1ec1u ki\u1ec7n s\u1ed1ng ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u v\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 c\u1ea1nh tranh gay g\u1eaft gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3.<\/p>\n

\nC.<\/strong>\u0111i\u1ec1u ki\u1ec7n s\u1ed1ng ph\u00e2n b\u1ed1 m\u1ed9t c\u00e1ch \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 c\u00f3 s\u1ef1 c\u1ea1nh tranh gay g\u1eaft gi\u1eefa c\u00e1c c\u00e1 th\u1ec3 trong qu\u1ea7n th\u1ec3.<\/p>\n

\nD.<\/strong>c\u00e1c c\u00e1 th\u1ec3 c\u1ee7a qu\u1ea7n th\u1ec3 s\u1ed1ng th\u00e0nh b\u1ea7y \u0111\u00e0n \u1edf nh\u1eefng n\u01a1i c\u00f3 ngu\u1ed3n s\u1ed1ng d\u1ed3i d\u00e0o nh\u1ea5t.<\/p>\n
24:<\/strong>\u00a0Ki\u1ec3u ph\u00e2n b\u1ed1 ng\u1eabu nhi\u00ean c\u00f3 \u00fd ngh\u0129a sinh th\u00e1i l\u00e0<\/p>\n
A.\u00a0<\/strong>t\u1eadn d\u1ee5ng ngu\u1ed3n s\u1ed1ng thu\u1eadn l\u1ee3i.<\/p>\n

\nB.<\/strong>ph\u00e1t huy hi\u1ec7u qu\u1ea3 h\u1ed7 tr\u1ee3 c\u00f9ng lo\u00e0i.<\/p>\n

\nC.<\/strong>gi\u1ea3m c\u1ea1nh tranh c\u00f9ng lo\u00e0i.<\/p>\n

\nD.<\/strong>h\u1ed7 tr\u1ee3 c\u00f9ng lo\u00e0i v\u00e0 gi\u1ea3m c\u1ea1nh tranh c\u00f9ng lo\u00e0i.<\/p>\n
25:<\/strong>\u00a0M\u1eadt \u0111\u1ed9 c\u1ee7a qu\u1ea7n th\u1ec3 l\u00e0<\/p>\n
A.\u00a0<\/strong>s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trung b\u00ecnh c\u1ee7a qu\u1ea7n th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong m\u1ed9t kho\u1ea3ng th\u1eddi gian x\u00e1c \u0111\u1ecbnh n\u00e0o \u0111\u00f3.<\/p>\n

\nB.<\/strong>s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 cao nh\u1ea5t \u1edf m\u1ed9t th\u1eddi \u0111i\u1ec3m x\u00e1c \u0111\u1ecbnh n\u00e0o \u0111\u00f3 trong m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch n\u00e0o \u0111\u00f3 c\u1ee7a qu\u1ea7n t\u1ec3.<\/p>\n

\nC.<\/strong>kh\u1ed1i l\u01b0\u1ee3ng sinh v\u1eadt th\u1ea5p nh\u1ea5t \u1edf m\u1ed9t th\u1eddi \u0111i\u1ec3m x\u00e1c \u0111\u1ecbnh trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1ec3 t\u00edch c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

\nD.<\/strong>s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 trung b\u00ecnh tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch hay th\u1ec3 t\u00edch c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n
26:<\/strong>\u00a0Lo\u00e0i n\u00e0o sau \u0111\u00e2y c\u00f3 ki\u1ec3u t\u0103ng tr\u01b0\u1edfng s\u1ed1 l\u01b0\u1ee3ng g\u1ea7n v\u1edbi h\u00e0m m\u0169?<\/p>\n
A.\u00a0<\/strong>R\u00e1i c\u00e1 trong h\u1ed3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>\u1ebech nh\u00e1i ven h\u1ed3.<\/p>\n

\nC.<\/strong>Ba ba ven s\u00f4ng.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>Vi khu\u1ea9n lam trong h\u1ed3.<\/p>\n
27:<\/strong>\u00a0N\u1ebfu ngu\u1ed3n s\u1ed1ng kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n, \u0111\u1ed3 th\u1ecb t\u0103ng tr\u01b0\u1edfng c\u1ee7a qu\u1ea7n th\u1ec3 \u1edf d\u1ea1ng<\/p>\n
A.\u00a0<\/strong>t\u0103ng d\u1ea7n \u0111\u1ec1u.<\/p>\n

\nB.<\/strong>\u0111\u01b0\u1eddng cong ch\u1eef J.<\/p>\n

\nC.<\/strong>\u0111\u01b0\u1eddng cong ch\u1eef S.<\/p>\n

\nD.<\/strong>gi\u1ea3m d\u1ea7n \u0111\u1ec1u.<\/p>\n
28:<\/strong>\u00a0Ph\u1ea7n l\u1edbn qu\u1ea7n th\u1ec3 sinh v\u1eadt trong t\u1ef1 nhi\u00ean t\u0103ng tr\u01b0\u1edfng theo d\u1ea1ng<\/p>\n
A.\u00a0<\/strong>t\u0103ng d\u1ea7n \u0111\u1ec1u.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>\u0111\u01b0\u1eddng cong ch\u1eef J.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nC.<\/strong>\u0111\u01b0\u1eddng cong ch\u1eef S.\u00a0\u00a0\u00a0\u00a0\u00a0D.<\/strong>gi\u1ea3m d\u1ea7n \u0111\u1ec1u.<\/p>\n
29:<\/strong>\u00a0K\u00edch th\u01b0\u1edbc c\u1ee7a m\u1ed9t qu\u1ea7n th\u1ec3 kh\u00f4ng ph\u1ea3i l\u00e0<\/p>\n
A.\u00a0<\/strong>t\u1ed5ng s\u1ed1 c\u00e1 th\u1ec3 c\u1ee7a n\u00f3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>t\u1ed5ng sinh kh\u1ed1i c\u1ee7a n\u00f3.<\/p>\n

\nC.<\/strong>n\u0103ng l\u01b0\u1ee3ng t\u00edch lu\u1ef9 trong n\u00f3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>k\u00edch th\u01b0\u1edbc n\u01a1i n\u00f3 s\u1ed1ng.<\/p>\n
30:<\/strong>\u00a0Khi n\u00f3i v\u1ec1 quan h\u1ec7 gi\u1eefa k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 v\u00e0 k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3, th\u00ec c\u00e2u\u00a0sai<\/strong>\u00a0l\u00e0:<\/p>\n
A.\u00a0<\/strong>Lo\u00e0i c\u00f3 k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 nh\u1ecf th\u01b0\u1eddng c\u00f3 k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 l\u1edbn.<\/p>\n

\nB.<\/strong>Lo\u00e0i c\u00f3 k\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 l\u1edbn th\u01b0\u1eddng c\u00f3 k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 nh\u1ecf.<\/p>\n

\nC.<\/strong>K\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 c\u1ee7a lo\u00e0i t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee7a qu\u1ea7n th\u1ec3.<\/p>\n

\nD.<\/strong>K\u00edch th\u01b0\u1edbc c\u01a1 th\u1ec3 v\u00e0 k\u00edch th\u01b0\u1edbc qu\u1ea7n th\u1ec3 c\u1ee7a lo\u00e0i th\u01b0\u1eddng c\u00f3 t\u01b0\u01a1ng quan sao cho ph\u00f9 h\u1ee3p v\u1edbi ngu\u1ed3n s\u1ed1ng.<\/p>\n
31:<\/strong>\u00a0\u0110\u1ec3 di\u1ec7t s\u00e2u \u0111\u1ee5c th\u00e2n l\u00faa, ng\u01b0\u1eddi ta th\u1ea3 ong m\u1eaft \u0111\u1ecf v\u00e0o ru\u1ed9ng l\u00faa. \u0110\u00f3 l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ea5u tranh sinh h\u1ecdc d\u1ef1a v\u00e0o<\/p>\n
A.\u00a0<\/strong>c\u1ea1nh tranh c\u00f9ng lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>kh\u1ed1ng ch\u1ebf sinh h\u1ecdc.<\/p>\n

\nC.<\/strong>c\u00e2n b\u1eb1ng sinh h\u1ecdc.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>c\u00e2n b\u1eb1ng qu\u1ea7n th\u1ec3.<\/p>\n
32:<\/strong>\u00a0Qu\u1ea7n x\u00e3 r\u1eebng U Minh c\u00f3 lo\u00e0i \u0111\u1eb7c tr\u01b0ng l\u00e0<\/p>\n
A.\u00a0<\/strong>t\u00f4m n\u01b0\u1edbc l\u1ee3.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>c\u00e2y tr\u00e0m.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nC.<\/strong>c\u00e2y mua.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>b\u1ecd l\u00e1.<\/p>\n
33:<\/strong>\u00a0T\u00ednh \u0111a d\u1ea1ng v\u1ec1 lo\u00e0i c\u1ee7a qu\u1ea7n x\u00e3 l\u00e0<\/p>\n
A.\u00a0<\/strong>m\u1ee9c \u0111\u1ed9 phong ph\u00fa v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i trong qu\u1ea7n x\u00e3.<\/p>\n

\nB.<\/strong>m\u1eadt \u0111\u1ed9 c\u00e1 th\u1ec3 c\u1ee7a t\u1eebng lo\u00e0i trong qu\u1ea7n x\u00e3.<\/p>\n

\nC.<\/strong>t\u1ec9 l\u1ec7 % s\u1ed1 \u0111\u1ecba \u0111i\u1ec3m b\u1eaft g\u1eb7p m\u1ed9t lo\u00e0i trong t\u1ed5ng s\u1ed1 \u0111\u1ecba \u0111i\u1ec3m quan s\u00e1t.<\/p>\n

\nD.<\/strong>s\u1ed1 lo\u00e0i \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong qu\u1ea7n x\u00e3.<\/p>\n
34:<\/strong>\u00a0Qu\u1ea7n x\u00e3 sinh v\u1eadt l\u00e0<\/p>\n
A.\u00a0<\/strong>t\u1eadp h\u1ee3p nhi\u1ec1u qu\u1ea7n th\u1ec3 sinh v\u1eadt thu\u1ed9c c\u00f9ng lo\u00e0i, c\u00f9ng s\u1ed1ng trong m\u1ed9t kh\u00f4ng gian x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u00fang c\u00f3 m\u1ed1i quan h\u1ec7 m\u1eadt thi\u1ebft, g\u1eafn b\u00f3 v\u1edbi nhau.<\/p>\n

\nB.<\/strong>t\u1eadp h\u1ee3p nhi\u1ec1u qu\u1ea7n th\u1ec3 sinh v\u1eadt thu\u1ed9c c\u00e1c lo\u00e0i kh\u00e1c nhau, c\u00f9ng s\u1ed1ng trong m\u1ed9t kh\u00f4ng gian x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u00fang \u00edt quan h\u1ec7 v\u1edbi nhau.<\/p>\n

\nC.<\/strong>t\u1eadp h\u1ee3p nhi\u1ec1u qu\u1ea7n th\u1ec3 sinh v\u1eadt thu\u1ed9c hai lo\u00e0i kh\u00e1c nhau, c\u00f9ng s\u1ed1ng trong m\u1ed9t kh\u00f4ng gian x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u00fang c\u00f3 m\u1ed1i quan h\u1ec7 m\u1eadt thi\u1ebft, g\u1eafn b\u00f3 v\u1edbi nhau.<\/p>\n

\nD.<\/strong>m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c\u00a0 qu\u1ea7n th\u1ec3 sinh v\u1eadt thu\u1ed9c c\u00e1c lo\u00e0i kh\u00e1c nhau, c\u00f9ng s\u1ed1ng trong m\u1ed9t kh\u00f4ng gian v\u00e0 th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh, c\u00f3 m\u1ed1i quan h\u1ec7 g\u1eafn b\u00f3 v\u1edbi nhau nh\u01b0 m\u1ed9t th\u1ec3 th\u1ed1ng nh\u1ea5t.<\/p>\n
35:<\/strong>\u00a0V\u00ed d\u1ee5 n\u00e0o sau \u0111\u00e2y ph\u1ea3n \u00e1nh quan h\u1ec7 h\u1ee3p t\u00e1c gi\u1eefa c\u00e1c lo\u00e0i?<\/p>\n
A.\u00a0<\/strong>Vi khu\u1ea9n lam s\u1ed1ng trong n\u1ed1t s\u1ea7n r\u1ec5 \u0111\u1eadu.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>Chim s\u00e1o \u0111\u1eadu tr\u00ean l\u01b0ng tr\u00e2u r\u1eebng.<\/p>\n

\nC.<\/strong>C\u00e2y phong lan b\u00e1m tr\u00ean th\u00e2n c\u00e2y g\u1ed7.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>C\u00e2y t\u1ea7m g\u1eedi s\u1ed1ng tr\u00ean th\u00e2n c\u00e2y g\u1ed7.<\/p>\n
36:<\/strong>\u00a0T\u1ea1i sao c\u00e1c lo\u00e0i th\u01b0\u1eddng ph\u00e2n b\u1ed1 kh\u00e1c nhau trong kh\u00f4ng gian theo chi\u1ec1u th\u1eb3ng \u0111\u1ee9ng ho\u1eb7c theo chi\u1ec1u ngang?<\/p>\n
A.\u00a0<\/strong>Do m\u1ed1i quan h\u1ec7 h\u1ed7 tr\u1ee3 gi\u1eefa c\u00e1c lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nB.<\/strong>Do nhu c\u1ea7u s\u1ed1ng kh\u00e1c nhau.<\/p>\n

\nC.<\/strong>Do m\u1ed1i quan h\u1ec7 c\u1ea1nh tranh gi\u1eefa c\u00e1c lo\u00e0i.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>Do h\u1ea1n ch\u1ebf v\u1ec1 ngu\u1ed3n dinh d\u01b0\u1ee1ng.<\/p>\n
37:<\/strong>\u00a0Di\u1ec5n th\u1ebf sinh th\u00e1i l\u00e0<\/p>\n
A.\u00a0<\/strong>qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i c\u1ee7a qu\u1ea7n th\u1ec3 t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ef1 thay \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\nB.<\/strong>qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i c\u1ee7a h\u1ec7 sinh th\u00e1i qua c\u00e1c giai \u0111o\u1ea1n, t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng<\/p>\n

\nC.<\/strong>qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i tu\u1ea7n t\u1ef1 c\u1ee7a qu\u1ea7n x\u00e3 qua c\u00e1c giai \u0111o\u1ea1n, t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng<\/p>\n

\nD.<\/strong>qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i tu\u1ea7n t\u1ef1 c\u1ee7a lo\u00e0i qua c\u00e1c giai \u0111o\u1ea1n, t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ef1 bi\u1ebfn \u0111\u1ed5i c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n
38:<\/strong>\u00a0\u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y\u00a0kh\u00f4ng<\/strong>\u00a0\u0111\u00fang v\u1edbi di\u1ec5n th\u1ebf th\u1ee9 sinh?<\/p>\n
A.\u00a0<\/strong>M\u1ed9t qu\u1ea7n x\u00e3 m\u1edbi ph\u1ee5c h\u1ed3i thay th\u1ebf qu\u1ea7n x\u00e3 b\u1ecb hu\u1ef7 di\u1ec7t.<\/p>\n

\nB.<\/strong>Trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng thu\u1eadn l\u1ee3i v\u00e0 qua qu\u00e1 tr\u00ecnh bi\u1ebfn \u0111\u1ed5i l\u00e2u d\u00e0i, di\u1ec5n th\u1ebf th\u1ee9 sinh c\u00f3 th\u1ec3 h\u00ecnh th\u00e0nh n\u00ean qu\u1ea7n x\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/p>\n

\nC.<\/strong>Trong \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i, di\u1ec5n th\u1ebf th\u1ee9 sinh c\u00f3 th\u1ec3 h\u00ecnh th\u00e0nh n\u00ean qu\u1ea7n x\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/p>\n

\nD.<\/strong>Trong th\u1ef1c t\u1ebf th\u01b0\u1eddng b\u1eaft g\u1eb7p nhi\u1ec1u qu\u1ea7n x\u00e3 c\u00f3 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i r\u1ea5t th\u1ea5p m\u00e0 h\u00ecnh th\u00e0nh qu\u1ea7n x\u00e3 b\u1ecb suy tho\u00e1i.<\/p>\n
39:<\/strong>\u00a0\u0110i\u1ec1u n\u00e0o sau \u0111\u00e2y\u00a0kh\u00f4ng\u00a0<\/strong>\u0111\u00fang v\u1edbi di\u1ec5n th\u1ebf nguy\u00ean sinh?<\/p>\n
A.\u00a0<\/strong>Kh\u1edfi \u0111\u1ea7u t\u1eeb m\u00f4i tr\u01b0\u1eddng tr\u1ed1ng tr\u01a1n.<\/p>\n

\nB.<\/strong>C\u00e1c qu\u1ea7n x\u00e3 sinh v\u1eadt bi\u1ebfn \u0111\u1ed5i tu\u1ea7n t\u1ef1, thay th\u1ebf l\u1eabn nhau v\u00e0 ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n \u0111a d\u1ea1ng.<\/p>\n

\nC.<\/strong>Kh\u00f4ng th\u1ec3 h\u00ecnh th\u00e0nh n\u00ean qu\u1ea7n x\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/p>\n

\nD.<\/strong>H\u00ecnh th\u00e0nh qu\u1ea7n x\u00e3 t\u01b0\u01a1ng \u0111\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/p>\n
40:<\/strong>\u00a0Nguy\u00ean nh\u00e2n b\u00ean trong g\u00e2y ra di\u1ec5n th\u1ebf sinh th\u00e1i l\u00e0<\/p>\n
A.\u00a0<\/strong>s\u1ef1 c\u1ea1nh tranh trong lo\u00e0i thu\u1ed9c nh\u00f3m \u01b0u th\u1ebf. \u00a0\u00a0
\nB.<\/strong>s\u1ef1 c\u1ea1nh tranh trong lo\u00e0i ch\u1ee7 ch\u1ed1t.
\nC.<\/strong>s\u1ef1 c\u1ea1nh tranh gi\u1eefa c\u00e1c nh\u00f3m lo\u00e0i \u01b0u th\u1ebf\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\nD.<\/strong>s\u1ef1 c\u1ea1nh tranh trong lo\u00e0i \u0111\u1eb7c tr\u01b0ng.<\/p>\n
<\/span><\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u0110\u1ec1 ki\u1ec3m tra 1 ti\u1ebft m\u00f4n Sinh 12 1:\u00a0C\u00f3 c\u00e1c lo\u1ea1i m\u00f4i tr\u01b0\u1eddng ph\u1ed5 bi\u1ebfn l\u00e0: A.\u00a0m\u00f4i tr\u01b0\u1eddng \u0111\u1ea5t, m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc, m\u00f4i tr\u01b0\u1eddng tr\u00ean c\u1ea1n, m\u00f4i tr\u01b0\u1eddng sinh v\u1eadt…. <\/p>\n","protected":false},"author":1,"featured_media":7494,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,450,472],"tags":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/7492"}],"collection":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/comments?post=7492"}],"version-history":[{"count":0,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/posts\/7492\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media\/7494"}],"wp:attachment":[{"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/media?parent=7492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/categories?post=7492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/onthitot.com\/wp-json\/wp\/v2\/tags?post=7492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}