A. Plants
They are not an example abiotic factor
Put it in a container of water. Then measure the volume of water before and after. The difference is the volume of the stone.
similarities:
The immune system and the nervous system maintain extensive communication, including 'hardwiring' of sympathetic and parasympathetic nerves to lymphoid organs. Neurotransmitters such as acetylcholine, norepinephrine, vasoactive intestinal peptide, substance P and histamine modulate immune activity.
