Week 2 Flashcards
What Is I33W?
3 legs
3 body sections
1 pair of antennae
wings
what is Insect Metamorphosis?
Metamorphosis: change in form (shape)
Complete Metamorphosis: juvenile stages
(larva, pupa) look different from adult
stage.
Gradual Metamorphosis: juvenile stages
(nymph) are a miniature of the adult stage.
what are Arthropod Characteristics?
Hard outer covering (exoskeleton)
ex = outside; as in exit
function: protective armor & prevents from drying out
molting: shedding exoskeleton
Segmented body
Jointed appendages
legs: flexibility of movement
antenna: sense organ
Most diverse animal group (insects)
what are Crustaceans (C5)
2-3 body sections
5 (to 8) or more pairs of legs
2 pairs of antennae
Example: crab, lobster, crayfish, shrimp, pill
bug
Environment: mostly marine; few land
What are Arachnids (A24)
2 body sections
4 pairs of legs
no antennae
Example: spider, mite, tick, scorpion
Environment: land, dry areas, hot climates
What are Milipedes and Centipedes (CMN)
2 body sections
Many pairs of legs 40-60 legs
1 pair of antenea
Centipede:1 pair of segemnted legs
Milipede: 2 pairs of segemnted legs
What is Mollusk Characteristics
soft body (unsegmented)
w/wo hard outer shell
mantle (covering internal organs & secretes shell)
foot
open circulatory system
Example: clams, oysters, scallops, snails,
mussels, squid, octopus, cuttlefish
what is Gastropods
1] radula (ribbon of tiny teeth)
2] creeping foot moves on
slippery mucus
what is Bivalves:
two-shelled Mollusk
two shells
filter feeders
what is Cephalopods
tentacles (modified foot)
swim by jet propulsion
with/without shell
nautilus: shell
squid/cuttlefish: tiny shell inside body
octopus: no shell
closed circulatory system
complex nervous system
large brain: intelligent
WHAT ARE WORM CHARACTERISTICS
long, narrow body without legs
bilateral symmetry
tissues, organs, organs systems present
first simple brain (bundle of nerve tissue)
