Question

which of these is not part of the cell theory? all cells come from other cells all cells have a nucleus all living things are made of cells a cell is the basic unit of life after fertilization, gametes join to make a haploid cell called gamete stem somatic zygote

Explanation:

1. Cell theory states that all living things are made of cells, a cell is the basic unit of life, and all cells come from pre - existing cells. Prokaryotic cells do not have a nucleus, so "All cells have a nucleus" is not part of cell theory.
2. Gametes are haploid cells. After fertilization, two gametes fuse to form a diploid cell called a zygote.

Answer:

1. B. All cells have a nucleus
2. D. zygote