Which of the following conditions is necessary for a species to survive? a. All its organisms must reproduce.
b. Some of its organisms must reproduce.
c. All of its organisms must live in the same place.
d. All of its organisms must live to old age.

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

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