Urey and Miller's experimental setup was able to produce many of the amino acids typically found in proteins. Some amino acids contain the element oxygen. Which starting material in the Urey-Miller experiment was the source of this element

Classify the descriptions and examples as endocrine or neural control

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

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