How long on a normal basis do a male and female when they have intercourse or made how long do they last

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

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 how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry