Which is the structure labeled a?

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

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?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity