做考古题不会又找不到答案的小问题 请高手们指教了 1. About how much of the sugar formed in a plant is used by the plant itself during cellular respiration? a)1% b)10% c)50% d)98% e)100% 2. Genes that are inactive for long periods of time tend to be bound to a) each other b) methyl group c) actin and myosin d) the nucleolus e) sulfate 3. Restriction enzymes are synthesized by a) bacteria only b) yeast and bacteria c) eukaryotic cell d) all kinds of cells 4. The maximum frequency of a recombination of genes at two loci is (I.e.% recombinant from its zygotes) a)25% b)50% c)75% d)100% 5. Of all the texa, the only one that exists in nature as a biologically cohesive unit is the a) species b) genus c) phylum or division d)kingdom 6. The most diverse and widespread of all contamporary plants are the a) mosses b) ferns c) conifers d) angiosperms 7. The parts of neurons that recieve neurotransmitters and pass on graded electronic potentials toward the soma are the a) myelin sheaths b) axons c) axon hillocks d) dendrites 对生物高手来说应该很简单吧.... 可是我花了一个下午翻遍书都找不到确定的答案... -- ◢◣ ︵︵ █▔◣ █▔█ █▔▔ █▔█ █▆▉ █ █▔█ █◣█ █▔● ◢◤█◣◢◣ ︵︵ █ █ █▁◤ █▁▁ █▁█ ▉▉▉ █ █▁█ █◥█ █ █ 梦之大地 逼逼ㄟ四 █▁◤ █ █ █▁▁ █ █ ▉▉▉ █▁ █ █ █ █ █▁◤ ※ Origin: <bbs.ccns.ncku.edu.tw> ◆ From: 61.62.6.157