What is the main food source for walruses?
a. Molluscs and echinoderms
b. Penguins
c. Seagrass
d. Fish and worms
a
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What would be the most direct result of an individual having an inability to produce surfactant in their alveoli?
A. The alveoli would physically collapse. B. The alveoli would be much more likely to harbor infections. C. The alveoli would fill with fluid due to an ion transport defect. D. Oxygen exchange with the blood would be impaired due to a thickening of the epithelium. E. Carbon dioxide exchange with the blood would be impaired due to an inhibition of carbonic anhydrase.
In the past century, warming temperatures have caused sea level to rise:
a. 20 centimeters b. 20 feet c. 20 inches d. 2.0 centimeters e. 2 meters
Bryophytes, like club mosses and certain other tracheophyte plants, require
A. soil to reproduce sexually. B. shade to reproduce sexually. C. water to reproduce sexually. D. sunlight to reproduce sexually. E. air to reproduce sexually.
What observation(s) would distinguish a dividing animal cell from a dividing plant cell?
A) decondensing chromosomes positioned at opposite poles of the spindle B) a bipolar spindle constructed from microtubules C) the presence of centrioles would be a feature unique to plant cells D) a constriction in the plasma membrane forming along the spindle equator E) all of the choices are unique to animal cells