1.1.10 In humans, oxygen and carbon dioxide are exchanged between the
alveoli in the lungs and the blood in the circulatory system. Which of
the following processes allows for the exchange of these gases in the
human body?
A. osmosis
B. simple diffusion
C. active transport
D. facilitated diffusion

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

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.

Give an example of a trait that is controlled by more than one gene.