Marine invertebrates that have surfaces permeable to salts and water so that they are always in osmotic equilibrium with their seawater environment are
A) osmotic regulators.
B) hyperosmotic.
C) hypoosmotic.
D) osmotic conformers.
E) stenohaline.
Correct Answer:
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A)gain water by osmosis.
B)absorb salt
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A)Protonephridium
B)Mesonephridium
C)Metanephridium
D)Nephridium
E)Eunephridium
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A) modern
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