Please help... This is middle school stuff. It'll be easy for you.

Volcano eruptions-when one plate is submerged below another, it melts and goes back to the surface as magma and creates a volcano

Earthquakes- when 2 plates slide against or hit each other

Seafloor spreading- where divergent plates move away from esch other, magma goes up to the surface and solidifies

Mountain formation- When two convergent continental plates hit each other. Continental plates are light so instead of submerging, they both rise higher to the surface and creates high land(mountains)

HOPE THIS HELPS

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.