What is the original source of energy for gasoline? O plants
O Sun
O petroleum
O fossil fuels

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

This is the interaction of two organisms where one is and the other is neither nor harmed.