One of these enzymes is found in a laboratory rat; whereas the other is found in an arctic fish. Obviously these two animals will have very different body temperatures. Explain which enzyme (A or B) is from which animal (rat or arctic fish).

Identify the type of energy used in each action. the flexing of an arm muscle: a signal transduction process by a neuron: a ball at the top of a hill: 1. electrical energy 2. mechanical energy 3. gravitational potential energy

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.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?