Question

what is cell division?
cell division is the process by which daughter cells split into parent cells.
cell division is the process by which cells create copies of themselves.
cell division is the process by which parent cells divide into three or more daughter cells.
cell division is the process by which daughter cells make copies of their parent cell.

Explanation:

To determine the correct definition of cell division, we analyze each option:

• The first option is incorrect because daughter cells do not split into parent cells; rather, parent cells divide to form daughter cells.
• The second option is correct. Cell division (like mitosis or binary fission in prokaryotes) is the process where a cell (parent cell) replicates its genetic material and cytoplasmic components to produce new cells (daughter cells) that are essentially copies of the parent cell, thus creating copies of themselves.
• The third option is incorrect. In typical cell division (mitosis in eukaryotes, binary fission in prokaryotes), a parent cell divides into two daughter cells, not three or more (except in some special cases like meiosis in some organisms but even then, it's usually four daughter cells from one parent cell in meiosis, but the general definition of cell division refers to the process of a cell producing two or more daughter cells, but the key here is that the option says "three or more" which is not the standard general case, and also the direction is wrong as parent cells divide into daughter cells, not the other way around as the option implies).
• The fourth option is incorrect as it has an incomplete sentence and also the concept is wrong. Daughter cells do not make copies of the parent cell; the parent cell divides to form daughter cells.

Answer:

B. Cell division is the process by which cells create copies of themselves.