Which statement correctly describes an interaction of the respiratory and
circulatory systems?
A. Breathing speeds up when heart rate slows down.
B. Breathing and heart rate slow down during exercise.
C. Breathing and heart rate speed up during exercise.
D. Heart rate speeds up when breathing slows down.

Describe two recent or ongoing space missions.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Which statements best describe monsoons? check all that apply. they force cool, moist air from oceans to rise. they are winds that blow in the opposite direction of a normal wind. they bring rain in the summer and drought in the winter they increase rainfall in south asia, africa, and australia. they influence precipitation as wind moves near a mountain.