All vertebrates have ________.
A) hair and a backbone
B) a skull and a backbone
C) four limbs and a backbone
D) scales and a backbone
Correct Answer:
Verified
Q30: Most chordates are _.
A)invertebrates
B)vertebrates
C)mammals
D)None of the above
Q31: The body symmetry of adult echinoderms could
Q32: Which arthropod subgroup includes the spiders?
A)Arachnids
B)Crustaceans
C)Insects
D)None of
Q33: Which type of worm lacks a complete
Q34: Which arthropod subgroup includes animals with six
Q36: Echinoderms can be best described as _.
A)eukaryotic
Q37: Worms all appear to be closely related
Q38: Which of the following phyla is the
Q39: Which worm phylum lacks body segmentation?
A)Flatworms
B)Annelids
C)Roundworms
D)Both flatworms
Q40: What are the key characteristics of arthropods?
A)Fused
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