A scientific hypothesis must be testable and yield results. It must state the intended or predicted result of the experiment
The answer is A or the first one
I believe the answer is comparative anatomy. It is the study of the similarities and differences in the structures of different species. Similar body parts may be homologies or analogies, such that both provide evidence of evolution. Similarities in embryos are evidence of common ancestry. For example all vertebrates embryos have gill slits and tails.
<span>This is the "Follicle stimulating hormone (FSH)." This FSH hormone is essential to the reproductive system in general.
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