Answer:
a. plasticity.
Explanation:
Plasticity is an organisms ability to change physiologically depending on the environmental circumstances, it is the ability of an organism to change in response to an external stimuli by applying an appropriate physiological adaptive response.
A. identical twins have identical DNA.
A prokaryote<span> is a unicellular organism that lacks a membrane-bound nucleus (</span>karyon<span>), mitochondria, or any other membrane-bound organelle.</span>