When taking antibiotics the drug is actively killing the bacteria, explain how using antibiotics is a form of natural selection. Explain if the selective pressure is acting on the bacteria or on you.

What is thought to have caused the mass extinction at the end of the cretaceous period?

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

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