A skeletal muscle is a composition of several components bundled one into the other which structural level in the muscle does contraction occurs to bring about contraction in the whole muscle?

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

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.

occluded front i think