They found fossils of algae, snails, and clams in layer D. Given that information, where do you think they found fossil evidence of simple land plants and amphibians? A) A. B) E. C) F. D) G.

Describe how alleles and genes are related

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture