A researcher studies how nitrogen moves from the atmosphere into the different living organisms in an area. This is an example of: a) community ecology
b) ecosystem ecology
c) global ecology
d) population ecology

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

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

What is the difference between an igneous, sedimentary and metamorphic rock