Brianna is mapping trees in a section of land. She observes that some of the trees are clumped together, some are uniformly separated, and some appear to be spaced randomly. What is she describing? A. the population density
B. the population distribution
C. the population growth
D. the population outline

the cell theory states that all living things including animals, as well as plants, are made of cells.

most community's take hundreds of years to become stable

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.