Which system carries food and oxygen to cells?

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?

Which would be the most useful source of evidence to support mcneill's contention?

Which of the following is not a potential result of deforestation?