Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. a rose plant homozygous for red flowers and long stems is crossed with a rose plant heterozygous for red flowers and homozygous for short stems. how many of the offspring will exhibit red, long-stemmed flowers?

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

Explain why ecosystem diversity results in species diversity in a healthy biosphere

Which of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis