B\u00e0i 1 (trang 14 SGK Sinh 11):<\/b>\u00a0Ch\u1ee9ng minh c\u1ea5u t\u1ea1o c\u1ee7a m\u1ea1ch g\u1ed7 th\u00edch nghi v\u1edbi ch\u1ee9c n\u0103ng v\u1eadn chuy\u1ec3n n\u01b0\u1edbc v\u00e0 c\u00e1c ion kho\u00e1ng t\u1eeb r\u1ec5 l\u00ean l\u00e1.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

C\u1ea5u t\u1ea1o c\u1ee7a m\u1ea1ch g\u1ed7 th\u00edch nghi v\u1edbi ch\u1ee9c n\u0103ng v\u1eadn chuy\u1ec3n n\u01b0\u1edbc v\u00e0 ion kho\u00e1ng t\u1eeb r\u1ec5 l\u00ean l\u00e1:<\/p>\n

– M\u1ea1ch g\u1ed7 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o b\u1edfi 2 lo\u1ea1i t\u1ebf b\u00e0o l\u00e0 qu\u1ea3n b\u00e0o v\u00e0 m\u1ea1ch \u1ed1ng. M\u1ea1ch g\u1ed7 v\u1eadn chuy\u1ec3n d\u1ecbch m\u1ea1ch g\u1ed7 (n\u01b0\u1edbc, ion kho\u00e1ng) t\u1eeb r\u1ec5 l\u00ean th\u00e2n, l\u00e1.<\/p>\n

– T\u1ebf b\u00e0o c\u00f3 c\u1ea5u t\u1ea1o d\u1ea1ng \u1ed1ng, v\u00e1ch t\u1ebf b\u00e0o \u0111\u01b0\u1ee3c linhin (lignin) h\u00f3a: t\u1ebf b\u00e0o b\u1ec1n ch\u1eafc, ch\u1ecbu n\u01b0\u1edbc, c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc d\u1ec5 d\u00e0ng b\u00e1m l\u00ean th\u00e0nh m\u1ea1ch \u0111\u1ec3 di chuy\u1ec3n l\u00ean tr\u00ean.<\/p>\n

– Khi chuy\u1ec3n h\u00f3a ch\u1ee9c n\u0103ng d\u1eabn n\u01b0\u1edbc v\u00e0 ion kho\u00e1ng, t\u1ebf b\u00e0o m\u1ea1ch g\u1ed7 l\u00e0 c\u00e1c t\u1ebf b\u00e0o ch\u1ebft: t\u0103ng t\u1ed1c \u0111\u1ed9 v\u1eadn chuy\u1ec3n n\u01b0\u1edbc do kh\u00f4ng c\u00f3 c\u00e1c th\u00e0nh ph\u1ea7n t\u1ebf b\u00e0o (m\u00e0ng sinh ch\u1ea5t, ch\u1ea5t nguy\u00ean sinh, kh\u00f4ng b\u00e0o,\u2026) c\u1ea3n tr\u1edf \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u1ecbch m\u1ea1ch g\u1ed7<\/p>\n

– C\u00e1c t\u1ebf b\u00e0o m\u1ea1ch g\u1ed7 x\u1ebfp s\u00e1t nhau, t\u1ebf b\u00e0o c\u00f3 c\u00e1c l\u1ed7 b\u00ean: thu\u1eadn ti\u1ec7n v\u1eadn chuy\u1ec3n d\u1ecbch m\u1ea1ch g\u1ed7 t\u1eeb t\u1ebf b\u00e0o n\u00e0y sang t\u1ebf b\u00e0o kh\u00e1c theo chi\u1ec1u ngang, h\u1ea1n ch\u1ebf s\u1ef1 ng\u1eebng, t\u1eafc trong con \u0111\u01b0\u1eddng v\u1eadn chuy\u1ec3n v\u00e0 n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u1eadn chuy\u1ec3n.<\/p>\n

– C\u00e1c t\u1ebf b\u00e0o c\u00f9ng lo\u1ea1i n\u1ed1i v\u1edbi nhau theo ki\u1ec3u \u0111\u1ea7u c\u1ee7a t\u1ebf b\u00e0o n\u00e0y g\u1eafn v\u1edbi \u0111\u1ea7u c\u1ee7a t\u1ebf b\u00e0o kia th\u00e0nh nh\u1eefng \u1ed1ng d\u00e0i t\u1eeb r\u1ec5 l\u00ean l\u00e1: t\u1ea1o s\u1ef1 li\u00ean k\u1ebft gi\u1eefa c\u00e1c t\u1ebf b\u00e0o, gi\u1eefa c\u00e1c ph\u00e2n t\u1eed trong d\u00f2ng d\u1ecbch v\u1edbi nhau, n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u1eadn chuy\u1ec3n.<\/p>\n

B\u00e0i 2 (trang 14 SGK Sinh 11):<\/b>\u00a0\u0110\u1ed9ng l\u1ef1c n\u00e0o gi\u00fap d\u00f2ng n\u01b0\u1edbc v\u00e0 c\u00e1c ion kho\u00e1ng di chuy\u1ec3n \u0111\u01b0\u1ee3c t\u1eeb r\u1ec5 l\u00ean l\u00e1 \u1edf nh\u1eefng c\u00e2y g\u1ed7 cao l\u1edbn h\u00e0ng ch\u1ee5c m\u00e9t?<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n