The breathing rate is controlled by chemoreceptors that detect
Select one:
a. levels of oxygen in the alveolar air space.
b. levels of oxygen in the blood.
c. levels of carbon dioxide in the alveolar air space.
d. levels of carbon dioxide in the blood.
e. level of stretching of the rib muscles and diaphragm.
d. levels of carbon dioxide in the blood.
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The ATP made during fermentation is generated by _____
A) the electron transport chain B) substrate-level phosphorylation C) chemiosmosis D) oxidative phosphorylation E) aerobic respiration
Capillary action is one of the forces that aids water's upward movement in plants. The narrower the diameter of the tube, the farther the water column will rise. Capillary action is a result of water molecules:
A. producing sufficient surface tension to overcome the pull of gravity. B. having a strong cohesive force and attaching to the surrounding vessel walls. C. storing heat and thus moving faster because of heat of vaporization. D. having an adhesive force, which allows them to attach to the vessel walls. E. being associated with hydrophobic molecules, which can result in upward movement.
Sitting in the sun on a hot day, a dog starts to pant and finally gets up and moves into the
shade. These activities help the dog maintain a constant body temperature; thus, this is an example of what process found in all living organism?
a. energy acquisition b. reproduction c. homeostasis d. evolution
In which habitat would you expect to encounter community assemblages that are most similar?
A. A savannah and a tropical rain forest. B. Freshwater streams in North America and Europe. C. A freshwater lake within a deciduous forest. D. The pelagic and intertidal zones of the same ocean.