Apurebred wingless red eyed fruit fly is crossed with a purebred winged sepia-eyed fruit fly to produce f1 flies. the f1 flies are crossed to produce f2 flies. what is the phenotypic ratio of the f2 flies

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )