If a man has red-green color blindness, a sex linked dominant trait, what is a possible genotype of his father? I. XR Y
II. Xr Y
III. XR XR
IV XR XT
A. I and II
B. I, II, and IV
C. Only III
D. I and III

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.

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement