Chapter 34 -6 Flashcards

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1
Q

Characteristics of scorpions?

A

poisonous sting
transition organism
terrestrial w/ crab characteristics
first arthropod to live on land

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2
Q

Characteristics of mites?

A

microscopic chelicerates
8 leggs w/ cephalothorax & abdomen
Chiggers & dustmites members

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3
Q

What happens w/ chigger bites?

A

uses chelicerate to make hole in hosts skins
injects saliva & enzymes into wound
tissue hardens into a stylostome - penetrates skin
intense itching - allergic reactions to chiggers’ saliva

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4
Q

Characteristics of limulus horseshoe crab?

A

transition
marine
spider characteristics (no chewing mouth)
collected for blood to enrich agar for pathogen growth

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5
Q

How do horseshoe crabs reproduce?

A

female mates w/ multiple males along shoreline at high tide
at full moon (spring tide)
hatching occurs in 2 weeks at new moon

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6
Q

Phylum Arthropoda, subphylum crustacea consists of what animals?

A

shrimp, barnacles, crayfish, lobsters, crabs

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7
Q

What is the structure of subphylum crustaceae?

A
chelapeds & walking legs on cephalothorax
chewing mouth (mandibles & maxillapeds)
swimmerettes on abdomen
uropods & telson are fins on abdomen
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8
Q

What are the sensory organs of crustaceae?

A

antennae & antennules

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9
Q

Phylum arthropoda, subphyulm uniramia consists of what animals?

A

centipedes, millipedes, insects

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10
Q

What are the characteristics of centipede?

A

1 pr. legs/segment
predaceous w/ poison bite
fast moving

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11
Q

What are the characteristics of millipede?

A

2 pr legs on abdominal segments
herbivore/saprovore
slow moving - rolls into balls when threatened
some secrete cyanide for defense

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