What type of blood vessel returns blood to the heart? a. artery b. vein c. capillary d. none of the above.

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

What must be done to breed dogs for a partical trait

Which locations on the map are low-pressure areas? a b c d e