Cytological examination of resting and contracted muscle provides important support for the sliding filaments model for how skeletal muscle contracts. this evidence includes the observation that during contraction the

The correct answer is that the H zone becomes narrower.

The H-band refers to the region of the thick filaments, which is not overlaid by the actin (thin filaments). Within the H-zone is a thin M-line, which is formed of cross-connecting components of the cytoskeleton.

At the time of muscle contraction, the A-bands do not vary in their length, whereas the H-zone and the I-bands shorten. This makes the Z-lines come near to each other.

her affection for her parents makes her an especially sympathetic character.

it is because according to the process , scientific inquiry is a process with many steps because each step occurs to the scientist and if you just skip a step there would be no steps to scientific inquiry.