*Actin filaments - resist pulling forces and convert chemical activity into mechanical motion. This is an endothelial cell stained to show actin filaments in the cytoskeleton:
A biochemical process that releases energy. For example, respiration.
In evolution, any change in the structure or functioning of an organism that makes it better suited to its environment.
Adenosine Diphosphate (ADP)
A nucleotide that is of fundamental importance as a carrier of energy in all organisms. It is composed of adenine, ribose and three phosphoryl groups; successive release of phosphate gives rise to ADP and adenosine monophosphate (AMP).
one of two or more alternate states of a gene that typically arise by mutation.