作者rainingpig (rainingpig)
站内Biology
标题[问题] 研究所考古题orz
时间Thu Feb 1 00:06:28 2007
因为研所的考古题都没有答案,有些不确定答案的题目和不会的题目想请问各位~
大感谢^________^
1.In a mating between two people of intermediate skin color , each heterozygous
at all the three gene loci for skin color , what is the chance there child
will have every light skin?
(1)1/64 (2)1/4 (3)5/8 (4)9/64
2.Offspring produced by vegetative reproduction are
(1)haploid(2)tetraploid(3)genetically identical(4)inferior to offspring
produce by sexual reproduction
3.The effect of interspecific competition on niches is to make them
(1)narrower (2)broader (3)change location (4)more triangular
4.An elological pyrimid of biomass is representation of ecosystem's
(1)energy flow through each trophic level
(2)tissue of each trophic level
(3)population in each food web
(4)biologic material in relation to abiotic material
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