How long did it take N. E.A. R. to reach Eros? A 4years
B 4.5 years
C 5years
D 5.5 Years

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Which direction does the energy flow in this energy pyramid ?