What did the miller-urey experiment demonstrate?

a. earths early atmosphere contained abundant oxygen
b. early earth was constantly bombarded with comets.
c. small organic molecules formed from gas mixture of earth's early atmosphere.
d. organisms were spontaneously generated on early earth.

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?