Q: What is the term for the average number of individuals in a population for a given area? Choices: - result density - population structure - Area Density - population density A:
population density

Q: In what state of matter are particles rigidly fixed in space and held tightly to neighboring particles? Choices: - Gases - liquids - energies - solids A:
solids

Q: Exchange occurs directly with the external environment in what type of organisms? Choices: - hematopoietic organisms - cell clusters - multicellular organisms - unicellular organisms A:
unicellular organisms