If the earth were closer to the sun, the intense heat might evaporate the oceans and create an atmosphere similar to the atmosphere of

c

explanation:

i think

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.