Which energy source produces less negative environmental impacts

A)Renewable Energy Sources
B)Fossil Fuels

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Polar zones are cold and tend to be dry because of a pressure system of cold. low high

The diagram shows the results when two parents are crossed. the letters represent alleles for a trait that is controlled by three different genes. which best describes this inheritance pattern? multiple allele because a trait is controlled by three different genes polygenic because the offspring have alleles from both parents multiple allele because the offspring have alleles from both parents polygenic because a trait is controlled by three different genes