Which of the following represents oxygen's potential path as it cycles? a. plant releases oxygen. oxygen molecules diffuse. bear inhales. b. oxygen percolates through the soil. oxygen enters the ocean and evaporates. dog inhales. c. squirrel exhales. oxygen falls as part of rain. oxygen is taken in through a plant's roots. d. cat exhales. oxygen molecules diffuse. plant takes in oxygen for photosynthesis.

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 did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Which organelle breaks down sugar molecules that supply energy to the cell ?