Question

what does it mean by “cells turn on different genes?” a cells will only turn on, or express, the genes whose proteins are needed. b all cells turn on different genes, giving them different functions. c all cells have different genes, giving them different functions. d all of the above

Explanation:

Cells have a full set of genes but express only those whose proteins are required for their specific functions, leading to different - functioning cells. Option a is correct as it accurately describes gene - expression based on protein needs. Option b is also correct as different gene expression in cells gives them different functions. Option c is incorrect because most somatic cells in an organism have the same set of genes, not different ones. Since a and b are correct, the overall answer is d.

Answer:

d. all of the above