In an estuary a zooplankton consumes a phytoplankton with a small globule of pcbs attached to it. a fish consumes the zooplankton as well as many other zooplankton. a larger fish consumes the small fish and then a gull consumes the larger fish. the increased concentration of the chemical at the top of the food chain is an example of

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4