How did ptolemy attempt to explain the apparent retrograde, or backwards motion, of several of the planets?.

True or false most plants are c3 plants, because they use molecules of carbohydrate known as g3p in their photosynthesis process.

What are the base pairing rules? how does this allow for dna replication

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. a parakeet that is heterozygous for blue feathers (dominant) is crossed with a parakeet that is homozygous for white feathers (recessive). according to the punnett square for this cross, what percentage of offspring is predicted to have blue feathers? 25 percent 50 percent 75 percent 100 percent