Outline for Zoology-Invertebrates (4)

To catch prey, spiders

spin webs of silk, sticky protein, to capture and immobilize prey through biting and secreting enzymes that liquify prey

Which is more threatening: smaller or larger scorpions?

Smaller

Ticks & mites are

parasites

Deer tick carries

lyme disease; special bacteria infects ticks for lyme disease; affects multiple organ systems

Picture of mites

Picture of scorpions

Crustacea

lobsters, shrimp, crabs, isopods (rollie pollies)

Scorpion

cephalothorax & stinging apparatus

Bodies of crustaceans

cephalothorax & abdomen; two pairs of antennae & pair of mandibles

Crayfish

abdomen, cephalothorax, carapace, 4 antennae, swimmerets, walking legs, & compound eye

Picture of crayfish

Swimmerets

move in sequence, starting at the back of the animal and moving forward

Carapace

protects cephalothorax & organs on crustaceans; made of chitin

Picture of shrimp

Picture of barnacles

Copepods & barnacles

sessile; attached & don’t move around as adults

Two pairs of wings

beetles, butterflies, bees, wasp

One pair of wings

flies, dragonflies

No wings

bugs, ants, grasshoppers

Insects

three part body plan, six legs, mandibles

Tracheae

multiple windpipes; openings are called spiracles on posterior end

Gradual/incomplete metamorphosis

egg, nymph (resemble smaller adults), adult; grasshoppers

Complete metamorphosis

egg, larva, pupa, & adult; butterfly

Pupa

dormant; sleep & develop into adult

Purpose of metamorphosis

diversifies diet & hides from prey

Centipede

hundred legged animal; carnivore

Millipede

thousand legged animal; herbivores; defense with hydrogen cyanide