Question

1. all body cells in an organism contain the same dna. why do they look and act differently?

a. because different genes are turned on or off
b. because each cell has different dna
c. because dna changes in each cell during development
d. because cells gain new chromosomes as they specialize

Explanation:

Todos los células del cuerpo de un organismo tienen el mismo ADN. La diferencia en su apariencia y función se debe a la regulación génica, es decir, a qué genes están activados o desactivados en cada tipo de célula.

Answer:

A. Because different genes are turned on or off