Examples why cells are small?

Answer 1

DNA is found in the nucleus of the cell, and when the cell is small, the information stored in that DNA is able to meet all of the cells needs. But as a cell increases in size, it usually does not make extra copies of DNA. Just think about a small town library with a few thousand books. If the town gets larger, there will be more and more people borrowing books, just like in a cell.

Answer 2

It could be any of these reasons:

1) Cells are small to keep the surface area to volume ratio high. This will allow for

efficient transport of nutrients into - and wastes out of - the cell.

2) The small size of cells enables rapid communication between cells. Such

communication may be in the form of electrical or chemical signals.

3) A small cell can replicate faster than a large one. Replicating to repair damaged

cells is essential to an organism's survival.

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* Not all cells are 'small' - an ostrich egg may be 6 inches across, and is a single cell.
Cell size depends on surface area to volume ratio. Being small means that there is a low volume, and a large surface area. This means that heat can be lost easily (a good thing, as respiration produces heat as a waste product), and materials can be exchanged efficiently.

Answer 3

Cells are small to keep the surface area to volume ratio high. The small size of cells enables rapid communication between cells. - See more at: http://www.chacha.com/question/what-are-two-reasons-why-cells-must-be-so-small#sthash.R7HBRmYU.dpuf

Answer 4

Cells are small because of the cell membrane.