Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

Fossils may help scientist to determine how previous species and or humans lived in the past. It's beneficial to us because if we can determine how they live we can see how they died and what era they came from not only that it can help us in the future to prevent diseases that may have been a cause back then. We can also link what species of fossils are link to certain animals or plants also.

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"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."