Which statement describes commensalism? 1.A relationship where one species benefits and the other is not affected.

2.A relationship where both species benefit

3.A relationship where one species benefits and the other is harmed

4.A competition for the same food source

Plz ! ive been stuck on this forever

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.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a