Which germ layer gives rise to the muscle layer of the uterus?
A) ectoderm
B) mesoderm
C) endoderm
Correct Answer:
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Q15: One trend in the evolution of animals
Q15: The only animals that lack tissues are:
A)sponges.
B)chordates.
C)chytrids.
D)cnidarians.
E)nematodes.
Q16: A multicellular organism that lacks cell walls
Q18: The skin and nervous tissues develop from
Q19: Between the organs and the body wall,
Q21: What causes schistosomiasis, a devastating disease that
Q22: Giant squids are classified as:
A)arthropods.
B)mollusks.
C)echinoderms.
D)chordates.
E)platyhelminthes.
Q23: Which cnidarian is the basis of an
Q24: The simplest multicellular animals that have only
Q25: Insects are:
A)annelids.
B)arthropods.
C)mollusks.
D)beetles.
E)arachnids.
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