Earths lower mantle lies just below what?

Identify the missing parts of the carbon cycle

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or 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?