Ions or large polar molecules cannot pass through the phospholipid bilayer!
Telomerase is active in gametes and most cancer cells, but is normally absent from, or at very low levels in, most somatic cells.
B is the answer to this question!
All life has a common ancestor which can be traced through different lineages. Due to the fact that any new generation comes from two parents who do not share the same features. As the number of generations increases the resemblance to previous ancestors begins to minimize. For example I have brown eyes just like my mother, however, my great great grandmother had hazel eyes.
Cancer is a mutation of multiple cells through the cell cycle. cancer doesn’t only effect one cell, but effects many