The area where open water fish roam is known as ____.
A. the pelagic province
B. the intertidal zone
C. the neritic zone
D. hydrothermal vents
E. the benthic province
Answer: A
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You are bitten by a mosquito that carries Plasmodium. Decide whether each statement is true or false
______ Histamine is released at the site of the bite and swelling occurs. ______ There is no response because single-cell eukaryotes have no effect on humans. ______ Cytotoxic T cells recognize and kill Plasmodium. ______ The complement system will lyse the infected cells. ______ There will be a strong secondary response since everyone is vaccinated for malaria at birth. What will be an ideal response?
Why do many non-native species, such as a prickly pear cactus brought to Australia from South America, rapidly become abundant when first introduced?
A) Non-native species increase their reproductive rate when introduced. B) The climate in the new site is more favorable than in its native site. C) The carrying capacity at the new site is higher than that at the native site. D) There are fewer predators and parasites capable of attacking the non-native species in the new site. E) Growth changes from an S-curve to a J-curve at the new site.
Bile aids in fat digestion by
A) removing the fatty acid chains from the glycerol. B) acting directly as a lipid-digesting enzyme. C) converting lipids to proteins, which can then be digested by proteases. D) breaking fat into small fat droplets that can then be digested by enzymes.
Without the activities of microorganisms, the functioning of Earth's ecosystems would cease
Indicate whether the statement is true or false