What is the main purpose of cell division in unicellular organisms?

To reproduce and create new, genetically identical organisms through a process called binary fission.

In multicellular organisms, what are two purposes of cell division?

Growth of the organism and replacement of worn out or injured cells.

The DNA must replicate or copy itself.

It condenses into an X-shaped structure with two genetically identical sister chromatids joined by a centromere.

7th GradeScience40 min

I can describe and explain the basic needs of cells for growth and reproduction.

5 min

Overview of Cell Division

Nucleus Biology

8 min

Key concepts students will learn:

•
Cells use a process called cell division to make new cells called daughter cells.
•
Before a cell divides, its DNA must replicate or copy itself so that the information can be passed on to each daughter cell.
•
Human somatic cells have 23 pairs of chromosomes for a total of 46, while gametes have a total of 23 chromosomes.

12 min

8 questions • Multiple choice & Short answer

5 min

“Describe two reasons why cells reproduce. Give an example of each.”

Get the complete package: