用以下英语单词写一段话

用以下英语单词写一段话
这是个英语跟生物题目.
用以下10-15个单词写一段话.要求用此词性.
不可以像,今天我学了这些单词.,这样的句子.
单词是:
natural selection
fitness
adaptation
traits
survival of the fittest
descent with modification
speciation
extinction
homologous
vestigial
variation
mutations
genetic recombination
genetic drift
reproductive isolation
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如得满意回复,会加分至50或80.
需看句子质量.
个人知道意思,但是无法将词义连接起来.
我在生物科也发过类似的知道问题,

Natural selection is an inevitable process that selects for the fitness of organism with different traits.The common reference to 'survival of the fittest' simply refers to adaptation of a species through through extinction of the less fit genotype.Mutations accumulate in the genotype of organisms,resulting in descent with modification,a situation where the genome of the descent is not homologous to that of the parent.These changes in the genome may result in phenotypic variations,which in some cases lead to speciation.Since natural selection only selects for fitness,useless traits that do no negatively impact fitness is not selected against; humans,for example,still possesses a vestigial tail despite of its obvious inutility.Speciation is not to be confused with genetic recombination,in which case the same genetic information is rearranged within a population; speciation is the result of novel alleles due to various types of mutations.Small populations,which may have been created by genetic drift,is often exposed to the issue to reproductive isolation,otherwise known as inbreeding.This reduces the variability in the population,and reduces the viability of the population as a whole.
你学什么的?怎么有这种题?