The wide distribution of rotifers in lakes can be attributed to
A) resting eggs which can withstand adverse conditions.
B) the distribution of eggs by wind.
C) the distribution of eggs by the feet of waterfowl.
D) ability to reproduce parthenogenetically.
E) all of the answers are correct.
Correct Answer:
Verified
Q45: The helmet-shaped,ciliated larva of nemerteans is the
A)onchosphere.
B)Muller.
C)pilidium.
D)miracidium.
E)cercaria.
Q46: Rotifers exchange respiratory gases
A)across the body surface.
B)through
Q47: Acanthocephalans are commonly called
A)roundworms.
B)blood worms.
C)flatworms.
D)probosis worms.
E)spiny-headed worms.
Q48: Animals in the phyla Cycliophora live exclusively
Q49: The acanthocephalan larval stage that emerges from
Q51: Some rotifers have a "shell" composed of
Q52: In the rotifer class _,amictic eggs develop
Q53: Covering the tegument of acanthocephalans is a
Q54: Nemerteans differ from flatworms in that they
Q55: Like the tapeworms,acanthocephalans lack
A)a nervous system.
B)a digestive
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