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

The correct answer is option A) An electromagnetic wave, such as an x-ray.

Explanation-

Sound wave is a mechanical wave, which needs a medium for its propagation. There is no medium between planets that is it is an empty space or vacuum.

Hence, sound wave can not propagate in between planets.

X ray is an electromagnetic wave, which needs no medium for its propagation. It can travel in space with the velocity of light.

Thus, the correct option is A).

answer; i believe that the correct answer is(d) nondisjunction during meiosis;