The present giraffe has a long neck as compared to
its ancestors. it could be due to
(a) natural selection
(b) isolation
(c) speciation
(d) inheritance of acquired character

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

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

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.