Which best describes neurons? a/like all eukaryotic cells, neurons do not have the ability to regulate what substances go in and out of the cell. b/ like all eukaryotic cells, neurons have a nucleus that controls the activities of the cell. c/ unlike other eukaryotic cells, neurons cannot produce energy that can be used to carry out the life-sustaining processes of the cell. d/ unlike other eukaryotic cells, neurons have a cell membrane.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: