On what basis have biologists determined that archaea and bacteria are not closely related?
a. they cannot interbreed.
b. they look very different.
c. their dna is very different.
d. they live in very different places.

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.

i need an image of the diagram