Which one identifies an acid ?
a. ph 11
b. ph 7
c. ph3

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.