Biology Flashcards
1
Q
Why are cells so small?
A
The surface to volume ratio accounts for the smaller size of cells. As a cell gets larger in volume, the surface available to intake nutrients and expel wastes gets smaller. A cell needs a surface area that suits its needs.
2
Q
What are the three statements involved in cell theory?
A
1) all living things are composed of cells.
2) the cell is the basic unit of life.
3) new cells arise only from pre existing cells.
