How does the nucleus control which proteins are made by the ribosomes? 1. It controls which genes get used.

2. It controls the number of ribosomes.

3. It controls the speed with which proteins are made.

4. It controls the order in which proteins are made.

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

26 a medida que cambia el clima, ¿qué tipo de reproducción más probablemente de a una especie mayores posibilidades de supervivencia?

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems