Which kind of wave would be observed in outer space between planets , where there is very little matter ? a . an electromagnetic wave , such as an x-ray b. an electromagnetic wave , such as a sound wave . c. a mechanical wave , such as an x-ray . d . a mechanical wave , such as a sound wave .

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.