Plant and animal cells share many similar structures. which of the following structures are found in both plant and animal cells? i. cell membrane ii. cell wall iii. chloroplast iv. cytoplasm v. nucleus

The structures that are doing in both types of cells are the cell membrane, cytoplasm, and nucleus. The cell wall and the chloroplasts are only found in plant cells.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -