Answer:
Polygenic is a phenotype that is influenced by more than one gene, Pleiotropy occurs when one gene influences two or more unrelated phenotypic traits.
Explanation:
A polygenic trait is influenced by something, while Pleiotropy influences two or more phenotypic traits...so in simple words, one is influenced by something and the other influences different things
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Can overload the immune system, causing you to become sick, and open to sicknesses.
Answer:
So, they do eat...they do reproduce...they are simple...and can move.
So if you were lazy and skipped a type of food mentioned or anything, please ask the entire question, with all the included words. This way I can evaluate from how/the way they say it.
Answer:
You take any of the "signs of change in populations of organisms and their environments". For imagine, Australopithecus (early man) turning to Homo sapiens. In that way they could tell that you took this journey.