All cells in a complicated multicellular organism
A) contain the same genome.
B) have the same function.
C) express the same parts of the genome at the same time during development.
D) control the expression of the genome.
E) randomly express parts of the genome.

Question

Quizplus · Accepted Answer

All cells in a complicated multicellular organism contain the same genome, but they differentiate into different cell types with different functions. This differentiation is achieved through the selective expression of different parts of the genome, which is controlled by the cells themselves. Therefore, D is the correct choice. Choices A, B, and C are incorrect because they imply that all cells in a multicellular organism are identical, which is not true. Choice E is incorrect because it suggests that gene expression is random, which is also not true as gene expression is highly regulated.

All Cells in a Complicated Multicellular Organism