All organisms are made up of cells. organisms can have
a.
200-300 cells each.
b.
either many cells or no cells.
c.
only one cell each.
d.
one cell or many cells.

one cells or many cells

Explanation: that organism made up of one cells are called unicellular and organism made up of two or more than are called as multicellular organisms

for e.g unicellular organism are amoeba

multicellular are plants fungi and animals

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).