Which is a factor that prevents us from finding Precambrian fossils?
O A. Rocks did not form in that era.
B. There was no life in that era.
O C. Most rocks from that era are deeply buried.
O D. Most fossils have been destroyed by meteorite impacts.

Which osmotic and ionic strategies must marine teleost fishes employ?

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..