All 4 of the macromolecules that make up living things are all based molecules, making them organic molecules.
a. oxygen
b. carbon
c. hydrogen
d. nitrogen

What role do traits play in affecting an organisms ability to reproduce? finches

When analyzing tree rings, what do scientists assume a thin ring indicates?

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve