Trilobites exist today as
A) freshwater dwellers.
B) terrestrial crustaceans.
C) aquatic insects.
D) horseshoe crabs.
E) fossils only;they are all extinct.
Correct Answer:
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Q13: Sea spiders
A)are extinct.
B)feed on fluids of soft-bodied
Q14: Eurypterids
A)resembled insects.
B)are extinct.
C)are called sea spiders.
D)were very
Q15: Spiders and insects have an excretory system
Q16: A male spider inseminates a female spider
Q17: Spiders breathe by means of
A)gills.
B)diffusion across the
Q19: Arthropods are
A)carnivorous.
B)herbivorous.
C)omnivorous.
D)both carnivorous and herbivorous.
E)All of the
Q20: Horseshoe crabs
A)are,like their relatives the trilobites and
Q21: The mites and ticks carry their mouthparts
Q22: Chelicerates have six pairs of appendages that
Q23: For scorpions,mating is particularly risky for the
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