Multiple Choice
Nematocysts are expelled when the
A) osmotic pressure reaches 140 atmospheres.
B) hydrostatic pressure exceeds the osmotic pressure.
C) internal hydrostatic pressure increases when water enters.
D) cnidocil stimulates the cnidocyte to decrease hydrostatic pressure and increase osmotic pressure.
E) None of the choices is correct
Correct Answer:

Verified
Correct Answer:
Verified
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