According to cell theory
a) all organisms are composed of tissues
b) the smallest unit of life is a nucleus
c) animals but not plants are composed of many cells
d) a multicellular organism is of many cells
e) new cells arose only from preexisting cells

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up