. Some organisms, like lizards who bask in the sun, use to help regulate their environment.

location, internal

Explanation:

Lizards usually use the sun and shade to regulate their body temperature

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.