The difficulties of maintaining a long-term immune memory to influenza viruses are due to

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

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Why is it important to study each branch of earth science?