Cells vary in size as well as shape, but all cells are very small.
Most cells are too small to be seen without a microscope.
Cells vary in size as well as shape and cannot be seen without a microscope.
What vary in size as well as shape and cannot be seen without a microscope?
Options:
[A] bushes
[B] matter
[C] cells
[D] grains
[E] sand
[F] bones
[G] apples
[H] small