Which type of system would a tropical rainforest be?

biological

ecological

interpersonal

social

if we wanted to describe and better understand the structure of the rings of saturn, we might develop a

scale.

system.

machine.

model.

which of the following could not be an example of input?

nitrogen gas

cold

light

these could all be input.

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.