Which species is/are most closely related to species S?

What was the land like over 500 million years ago? what was under the sea?

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots