In an organism with a diploid number of 18, a skin cell has chromosomes, a developing sperm cell after the first meiotic division has chromosomes, and a newly formed zygote has chromosomes.

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

Why does the skin of your finger shrink when you wash clothes for a long time?

The distribution of related animals and plants across the world