Which internal energy source is the most important in continuing to heat the terrestrial planets today?

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex

An animal cell (left) and a plant cell (right) are shown.which organelle, labeled x in the diagram, is found in both plant and animal cells?