Why may there be variations in plants grown from seeds?

Because the seeds are formed as a result of sexual reproduction, which brings about genetic variation

Explanation:

Ideally, the chances of genetic variation in organisms increases as a result of sexual reproduction. Specifically, the meiotic process in sexual reproduction ensures this. Seeds are plant structures used for propagation, as they grow and develop into new organisms.

A plant propagated by SEEDS will possess variation because the seeds were formed from sexual reproduction i.e. fertilization of male gamete (pollen) and female ova. Note that each of these gametes that combined to form a seed, were produced by meiotic division.

prokaryotic cells do not have a nucleus in which the dna is stored in, it floats freely inside the cell.

eukaryote cells do have a nucleus in which the dna is stored in.