How do fossils of lystrosaurus provide evidence that continents were once joined together but later broke apart?

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

This is the interaction of two organisms where one is and the other is neither nor harmed.

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine