Which phrase describes the way air particles vibrate with respect to the way a sound wave travels?

A. Opposite to
B. Parallel to
C. Equal to
D. Perpendicular to

the answer is parallel to

Explanation:

just took the apex quiz and got it right buttt sound waves are always longitudinal waves and longitudinal waves always move parallel :)

the correct answer is sex-linked recessive.

i just took the test

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.