The state of energy balance is determined by subtracting the calories expended from the calories consumed. a. true b. false

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.