Question

question 7 of 10
how does the expression of genes result in variations among cells?
a. each cell in an organism has a unique set of genes for the proteins it needs.
b. cells use all of their genes all the time to make sure they always have what they need.
c. the types of genes in a cell change over time as the needs of the cell change.
d. when genes are turned on, the cell will make specific proteins that it needs.

Explanation:

do not change over time (except in cases of mutation, which is not the normal mechanism for cell - to - cell variation in gene expression).

Answer:

do not change over time (except in cases of mutation, which is not the normal mechanism for cell - to - cell variation in gene expression).