Chapter 34 -6

Question 1

Characteristics of scorpions?

Answer 1

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

Question 2

Characteristics of mites?

Answer 2

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

Question 3

What happens w/ chigger bites?

Answer 3

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

Question 4

Characteristics of limulus horseshoe crab?

Answer 4

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

Question 5

How do horseshoe crabs reproduce?

Answer 5

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

Question 6

Phylum Arthropoda, subphylum crustacea consists of what animals?

Answer 6

shrimp, barnacles, crayfish, lobsters, crabs

Question 7

What is the structure of subphylum crustaceae?

Answer 7

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

Question 8

What are the sensory organs of crustaceae?

Answer 8

antennae & antennules

Question 9

Phylum arthropoda, subphyulm uniramia consists of what animals?

Answer 9

centipedes, millipedes, insects

Question 10

What are the characteristics of centipede?

Answer 10

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

Question 11

What are the characteristics of millipede?

Answer 11

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