What is the function of the shark rectal gland?
A) It is involved in osmoregulation.
B) It is responsible for excretion of undigested residue.
C) It secretes a hypotonic solution.
D) It concentrates electrolytes necessary for homeostasis in a hypertonic environment.
Correct Answer:
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Q2: Tissues of sharks are isotonic to seawater,but
Q3: Freshwater fish reside in hypotonic environments.They do
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