Tectonic plates are able to move because of

a) sliding of the continents toward the oceans

b) gravitational differences between different parts of earth as it revolves around the sun

c) relatively dense oceanic crust sinking into the weak asthenosphere at subduction zones

d) the sinking of the continents into oceanic crust at the mid-ocean ridge

answer; i believe the correct answer to the above question is ( friction)

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.