All members of the phylum Chordata share
A) a notochord present sometime in their lives.
B) a vertebral column.
C) gills present throughout their lives.
D) tails present throughout their lives.
E) exoskeletons.
Correct Answer:
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Q3: The exoskeleton of arthropods
A)grows with the animal.
B)is
Q4: In sponges, the choanocytes or collar cells
A)are
Q5: Mammals have two traits that set them
Q6: In cnidarians, nematocysts are important in
A)food digestion.
B)excretion
Q7: It is generally thought that four critical
Q9: Birds are able to maintain relatively constant
Q10: Most members of the phylum Platyhelminthes
A)are free-living.
B)exhibit
Q11: All of the following are general characteristics
Q12: The mantle in mollusks
A)secretes the shell and
Q13: It is generally thought that animals have
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