The primary colors of visible light are red, orange, yellow, green, blue, and violet.
A. True
B. False

What organ systems are working to you cool down after a workout?

Which type of neuron stimulates muscles to contract?

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