How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading? a. They show when Earth's poles reversed.
b. They show how the density of the seafloor has changed.
c. They reveal a matching pattern on either side of the ridge.
d. They reveal differences in the mineral composition of newly created rock.

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.

it is called the mitotic spindle

to this one it would be receptive field