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The mouthparts of ticks and mites are carried on an anterior projection called the __________.

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capitulum

Trilobites exist today as


A) freshwater dwellers.
B) terrestrial crustaceans.
C) aquatic insects.
D) horseshoe crabs.
E) fossils only;they are all extinct.

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Centipedes


A) are herbivorous.
B) have poison claws.
C) have five pairs of legs.
D) use gills for respiration.
E) are parthenogenetic and always oviparous.

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Some mites,such as the _______ ________ or family Tetranychidae,are very destructive to plants.

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spider mites

What is the evidence that suggests pycnogonids are more closely related to crustaceans than to other arthropods? Why is this evidence contrary to molecular evidence that suggests otherwise?

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The evidence that suggests pycnogonids a...

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Four classes of myriapods are Chilopoda,Pauropoda,Symphyla and _____________.

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Discuss features of ticks that make them such excellent vectors of human arthropod-borne diseases.

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Ticks are excellent vectors of human art...

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Members of the subphylum ________________ were abundant during the Cambrian period.

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Eurypterids


A) resembled insects.
B) are extinct.
C) are called sea spiders.
D) were very small aquatic scorpions.
E) were huge ancient scorpions that wandered on land.

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You find a white,soft-bodied myriapod in the soil in a flower pot.It has long antenna but lacks eyes and fang-like claws.It most likely is a


A) pauropod.
B) symphylan.
C) centipede.
D) millipede.
E) None of the choices is correct.

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The correct order for layers of ectoskeleton from outside to inside is


A) endocuticle-epicuticle-exocuticle.
B) endocuticle-exocuticle-epicuticle.
C) exocuticle-endocuticle-epicuticle.
D) epicuticle-exocuticle-endocuticle.
E) exocuticle-epicuticle-endocuticle.

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Groups of segments fused or combined into functional groups are called __________.

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You would be most likely to find a pauropod if you examined


A) the fur of a mammal,since they are parasites.
B) under a rock in a stream.
C) moist soil,leaf litter,or decaying debris.
D) inside the juicy tissues of a host plant.
E) an intertidal pool.

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During mating in spiders,the male inserts his ____________ into the genital opening of the female.

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Another name for the harvestman is ________ ________.

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The excretory system of insects and spiders works by


A) excreting wastes across the digestive system membrane.
B) active transport of just the waste molecules across the tubules.
C) transport of all ions and solutes across the tubule and retrieval of water and useful ions in the rectum.
D) excretion of only ions and wastes in the rectum.
E) packaging and sealing off toxic wastes until the organism dies.

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Spiders and insects have an excretory system composed of


A) permeable surface cuticle.
B) enclosed book lungs.
C) flame cells.
D) green glands.
E) malpighian tubules.

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Chelicerates have six pairs of appendages that include a pair of pedipalps,four pairs of walking legs,and a pair of ____________________.

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A male spider inseminates a female spider by


A) normal abdomen to abdomen mating.
B) external fertilization where a male spider dances a female over a spermatophore packet.
C) injecting sperm with his pedipalps and then rapidly retreating before being eaten.
D) transferring sperm via silk.
E) avoiding the dangerous female spider altogether and fertilizing the eggs after they are laid in an egg case.

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C

The millipedes


A) bear two pairs of legs on most body segments.
B) are very beneficial because they feed on insects.
C) are more active than centipedes because they have more legs.
D) have flattened bodies in contrast to centipedes.
E) lack spiracles and tracheae and therefore differ from centipedes.

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