Which is the most recently evolved embryonic tissue in animals?
A) mesoderm
B) ectoderm
C) endoderm
D) periderm
E) epiderm
Correct Answer:
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Q12: Which animal lacks symmetry, has no embryonic
Q13: Most animal lineages evolved during the _
Q14: Which animal has radial symmetry, a gastrovascular
Q15: Snails are examples of _.
A) cephalopods
B) pseudopods
C)
Q16: Which animal lacks a "true" coelom?
A) flatworms
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)
Q21: What is the function of a clitellum
Q22: The smartest of all invertebrates is the
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