What needs to happen first for fertilization to take place? The ovary releases an egg into the uterus. Sperm travels to the Fallopian tube. The protective covering of the egg hardens.

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

What is the most important inorganic material for livings things? ! due tomorrow!

Why do the circulatory systems of land vertebrates have separate circuits to the lungs and to the rest of the body?