B\u00e0i 1 (trang 194 SGK Sinh h\u1ecdc 12):\u00a0Th\u1ebf n\u00e0o l\u00e0 chu\u1ed7i v\u00e0 l\u01b0\u1edbi th\u1ee9c \u0103n? Cho v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 2 chu\u1ed7i th\u1ee9c \u0103n.<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n – M\u1ed9t chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m nhi\u1ec1u lo\u00e0i c\u00f3 quan h\u1ec7 dinh d\u01b0\u1ee1ng v\u1edbi nhau v\u00e0 m\u1ed7i lo\u00e0i l\u00e0 m\u1ed9t m\u1eaft x\u00edch c\u1ee7a chu\u1ed7i.<\/p>\n – Trong m\u1ed9t l\u01b0\u1edbi th\u1ee9c \u0103n m\u1ed9t lo\u00e0i sinh v\u1eadt kh\u00f4ng ph\u1ea3i ch\u1ec9 tham gia v\u00e0o m\u1ed9t chu\u1ed7i th\u1ee9c \u0103n m\u00e0 c\u00f2n tham gia \u0111\u1ed3ng th\u1eddi v\u00e0o c\u00e1c chu\u1ed7i th\u1ee9c \u0103n kh\u00e1c, h\u00ecnh th\u00e0nh n\u00ean nhi\u1ec1u m\u1eaft x\u00edch chung. T\u1ea5t c\u1ea3 c\u00e1c chu\u1ed7i th\u1ee9c \u0103n v\u1edbi nhi\u1ec1u m\u1eaft x\u00edch chung h\u1ee3p th\u00e0nh m\u1ed9t l\u01b0\u1edbi th\u1ee9c \u0103n.<\/p>\n – V\u00ed d\u1ee5 v\u1ec1 hai lo\u1ea1i chu\u1ed7i th\u1ee9c \u0103n:<\/p>\n Chu\u1ed7i th\u1ee9c \u0103n \u0111\u01b0\u1ee3c m\u1edf \u0111\u1ea7u b\u1eb1ng sinh v\u1eadt t\u1ef1 d\u01b0\u1ee1ng, sau \u0111\u00f3 \u0111\u1ebfn \u0111\u1ed9ng v\u1eadt \u0103n sinh v\u1eadt t\u1ef1 d\u01b0\u1ee1ng v\u00e0 ti\u1ebfp n\u1eefa l\u00e0 c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0103n \u0111\u1ed9ng v\u1eadt. V\u00ed d\u1ee5, c\u00e2y ng\u00f4 \u2192 s\u00e2u \u0103n l\u00e1 ng\u00f4 \u2192 nh\u00e1i \u2192 r\u1eafn h\u1ed5 mang \u2192 di\u1ec1u h\u00e2u.<\/p>\n Chu\u1ed7i th\u1ee9c \u0103n m\u1edf \u0111\u1ea7u b\u1eb1ng sinh v\u1eadt ph\u00e2n gi\u1ea3i, sau \u0111\u1ebfn c\u00e1c lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0103n th\u1ecbt. V\u00ed d\u1ee5, l\u00e1, c\u00e0nh c\u00e2y kh\u00f4, m\u1ee5c n\u00e1t \u2192 m\u1ed1i \u2192 nh\u1ec7n \u2192 th\u1eb1n l\u1eb1n.<\/p>\n B\u00e0i 2 (trang 194 SGK Sinh h\u1ecdc 12):\u00a0Cho v\u00ed d\u1ee5 v\u1ec1 c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng c\u1ee7a 1 qu\u1ea7n x\u00e3 t\u1ef1 nhi\u00ean v\u00e0 1 qu\u1ea7n x\u00e3 nh\u00e2n t\u1ea1o.<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n * V\u00ed d\u1ee5 v\u1ec1 c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng c\u1ee7a m\u1ed9t qu\u1ea7n x\u00e3 t\u1ef1 nhi\u00ean (qu\u1ea7n x\u00e3 \u0111\u1ed3ng c\u1ecf):<\/p>\n – Sinh v\u1eadt s\u1ea3n xu\u1ea5t: c\u00e2y c\u1ecf, c\u00e2y b\u1ee5i<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 1: s\u00e2u \u0103n l\u00e1 c\u00e2y, r\u1ec7p, chu\u1ed9t<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 2: chim s\u00e2u, r\u1eafn<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc cao nh\u1ea5t: di\u1ec1u h\u00e2u<\/p>\n – Sinh v\u1eadt ph\u00e2n gi\u1ea3i: vi khu\u1ea9n, n\u1ea5m, m\u1ed1i, giun \u0111\u1ea5t<\/p>\n * V\u00ed d\u1ee5 v\u1ec1 c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng c\u1ee7a 1 qu\u1ea7n x\u00e3 t\u1ef1 nhi\u00ean (qu\u1ea7n x\u00e3 su\u1ed1i):<\/p>\n – Sinh v\u1eadt s\u1ea3n xu\u1ea5t: t\u1ea3o l\u1ee5c, t\u1ea3o silic, thu\u1ef7 t\u1ee9c<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 1: mu\u1ed7i n\u01b0\u1edbc, t\u00f4m, c\u00e1.<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 2: nh\u1ec7n n\u01b0\u1edbc, c\u00e1 qu\u1ea3<\/p>\n – Sinh v\u1eadt ph\u00e2n gi\u1ea3i: vi khu\u1ea9n, giun<\/p>\n – Ch\u1ea5t h\u1eefu c\u01a1 t\u1eeb ngo\u00e0i theo d\u00f2ng su\u1ed1i: c\u00e1c m\u1ea9u l\u00e1 c\u00e2y, c\u00e0nh c\u00e2y, r\u00e1c,\u2026<\/p>\n * V\u00ed d\u1ee5 v\u1ec1 b\u1eadc dinh d\u01b0\u1ee1ng qu\u1ea7n x\u00e3 nh\u00e2n t\u1ea1o (qu\u1ea7n x\u00e3 \u0111\u1ed3ng l\u00faa):<\/p>\n – Sinh v\u1eadt s\u1ea3n xu\u1ea5t: c\u00e2y l\u00faa<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 1: s\u00e2u \u0111\u1ee5c th\u00e2n l\u00faa, r\u1ec7p, chu\u1ed9t<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc 2: chim s\u00e2u, r\u1eafn<\/p>\n – Sinh v\u1eadt ti\u00eau th\u1ee5 b\u1eadc cao nh\u1ea5t: di\u1ec1u h\u00e2u<\/p>\n – Sinh v\u1eadt ph\u00e2n gi\u1ea3i: vi khu\u1ea9n, n\u1ea5m, m\u1ed1i, giun \u0111\u1ea5t<\/p>\n B\u00e0i 3 (trang 194 SGK Sinh h\u1ecdc 12):\u00a0Ph\u00e2n bi\u1ec7t ba lo\u1ea1i th\u00e1p sinh th\u00e1i.<\/strong><\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n * Ba lo\u1ea1i th\u00e1p sinh th\u00e1i:<\/p>\n – Th\u00e1p s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 sinh v\u1eadt \u1edf m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng.<\/p>\n – Th\u00e1p sinh kh\u1ed1i x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng t\u1ed5ng s\u1ed1 c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c sinh v\u1eadt tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch hay th\u1ec3 t\u00edch \u1edf m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng.<\/p>\n – Th\u00e1p n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean s\u1ed1 n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c t\u00edch lu\u1ef9 tr\u00ean m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch hay th\u1ec3 t\u00edch, trong m\u1ed9t \u0111\u01a1n v\u1ecb th\u1eddi gian \u1edf m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng.<\/p>\n * M\u1ed7i lo\u1ea1i th\u00e1p c\u00f3 \u01b0u \u0111i\u1ec3m v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/p>\n – Th\u00e1p s\u1ed1 l\u01b0\u1ee3ng d\u1ec5 x\u00e2y d\u1ef1ng song \u00edt c\u00f3 gi\u00e1 tr\u1ecb v\u00ec k\u00edch th\u01b0\u1edbc c\u00e1 th\u1ec3 c\u0169ng nh\u01b0 ch\u1ea5t s\u1ed1ng c\u1ea5u t\u1ea1o n\u00ean c\u00e1c lo\u00e0i c\u1ee7a c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng kh\u00e1c nhau, kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t, n\u00ean vi\u1ec7c so s\u00e1nh kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n – Th\u00e1p sinh kh\u1ed1i c\u00f3 gi\u00e1 tr\u1ecb cao h\u01a1n th\u00e1p s\u1ed1 l\u01b0\u1ee3ng. Do m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng \u0111\u1ec1u \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng s\u1ed1 l\u01b0\u1ee3ng ch\u1ea5t s\u1ed1ng, n\u00ean ph\u1ea7n n\u00e0o c\u00f3 th\u1ec3 so s\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng v\u1edbi nhau. Tuy nhi\u00ean, th\u00e1p sinh kh\u1ed1i c\u0169ng c\u00f3 nhi\u1ec1u nh\u01b0\u1ee3c \u0111i\u1ec3m: Th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc v\u00e0 gi\u00e1 tr\u1ecb n\u0103ng l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t s\u1ed1ng trong c\u00e1c b\u1eadc dinh d\u01b0\u1ee1ng l\u00e0 kh\u00e1c nhau. Th\u00e1p sinh kh\u1ed1i kh\u00f4ng ch\u00fa \u00fd t\u1edbi y\u1ebfu t\u1ed1 th\u1eddi gian trong vi\u1ec7c t\u00edch lu\u1ef9 sinh kh\u1ed1i \u1edf m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng.<\/p>\n – Th\u00e1p n\u0103ng l\u01b0\u1ee3ng l\u00e0 lo\u1ea1i th\u00e1p ho\u00e0n thi\u1ec7n nh\u1ea5t. Tuy nhi\u00ean, x\u00e2y d\u1ef1ng th\u00e1p n\u0103ng l\u01b0\u1ee3ng kh\u00e1 ph\u1ee9c t\u1ea1p, \u0111\u00f2i h\u1ecfi nhi\u1ec1u c\u00f4ng s\u1ee9c, th\u1eddi gian.<\/p>\n B\u00e0i 4 (trang 194 SGK Sinh h\u1ecdc 12):\u00a0H\u00e3y ch\u1ecdn ph\u01b0\u01a1ng \u00e1n tr\u1ea3 l\u1eddi \u0111\u00fang.<\/strong><\/p>\n Quan s\u00e1t m\u1ed9t th\u00e1p sinh kh\u1ed1i, ch\u00fang ta c\u00f3 th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin n\u00e0o sau \u0111\u00e2y?<\/p>\n a) C\u00e1c lo\u00e0i trong chu\u1ed7i v\u00e0 l\u01b0\u1edbi th\u1ee9c \u0103n.<\/p>\n b) N\u0103ng su\u1ea5t c\u1ee7a sinh v\u1eadt \u1edf m\u1ed7i b\u1eadc dinh d\u01b0\u1ee1ng.<\/p>\n c) M\u1ee9c \u0111\u1ed9 dinh d\u01b0\u1ee1ng \u1edf t\u1eebng b\u1eadc v\u00e0 to\u00e0n b\u1ed9 qu\u1ea7n x\u00e3.<\/p>\n d) Quan h\u1ec7 gi\u1eefa c\u00e1c lo\u00e0i trong qu\u1ea7n x\u00e3.<\/p>\n L\u1eddi gi\u1ea3i:<\/b><\/p>\n \u0110\u00e1p \u00e1n: c.<\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" B\u00e0i 1 (trang 194 SGK Sinh h\u1ecdc 12):\u00a0Th\u1ebf n\u00e0o l\u00e0 chu\u1ed7i v\u00e0 l\u01b0\u1edbi th\u1ee9c \u0103n? Cho v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 2 chu\u1ed7i th\u1ee9c \u0103n. L\u1eddi gi\u1ea3i: – M\u1ed9t chu\u1ed7i th\u1ee9c \u0103n g\u1ed3m nhi\u1ec1u lo\u00e0i c\u00f3 quan h\u1ec7 dinh d\u01b0\u1ee1ng v\u1edbi nhau v\u00e0 m\u1ed7i lo\u00e0i l\u00e0 m\u1ed9t m\u1eaft x\u00edch c\u1ee7a chu\u1ed7i. – Trong m\u1ed9t l\u01b0\u1edbi […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1307],"tags":[1397,1398],"yoast_head":"\n