What is the function of a clitellum in earthworms?
A) anchoring an animal to its substrate
B) digestion
C) cushions organs
D) glues two organisms together for sperm exchange
E) keeps blood from clotting
Correct Answer:
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Q16: Which animal lacks a "true" coelom?
A) flatworms
Q17: Which is the most recently evolved embryonic
Q18: Squids are examples of _.
A) cephalopods
B) pseudopods
C)
Q19: Drugs used to treat AIDS and herpes
Q20: What are nematocysts?
A) reproductive cells
B) excretory organs
C)
Q22: The smartest of all invertebrates is the
Q23: Which of the following is a defining
Q24: A mite is most closely related to
Q25: Most tunicate adults are _.
A) herbivores
B) photoautotrophs
C)
Q26: Which of the following invertebrates is most
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