20.1-20.3 Flashcards
largest and most diverse group of animals
invertebrates
animals without backbones
invertebrates
invertebrates with jointed apendages
arthropods
external skeleton
exoskeleton (found in arthropods)
most varied and numerous of all God’s living creatures
insects (more than 70% of all animals species)
scientists who study insects
entomologists
three regions of insects
head, thorax, and abdomen
process by which insects mature
metamorphosis
insect begins life as an egg that hatches into a nymph (immature form of the insect that looks much like the adult but different body proportions and lacks wings)
incomplete metamorphosis
egg develops into larva (worm-like eating and growing stage), then forms cocoon or chrysalis and enters resting stage of its life as a pupa before becoming the adult insect
complete metamorphosis
one of the most common and most familiar insects
grasshopper
eyes that detect only light and shadow
simple eyes
eyes that are sensitive to shape, color, and movement
compound eyes
components of an insect’s mouth
mouthparts
portion of an insect’s body with legs and wings attached that acts as the locomotion center
thorax
respiratory openings
spiracles
_____ do not have a closed system of blood vessels like mammals and humans
insects
egg-laying portion of an insect
ovipositor
straight wing
orthoptera
crickets, grasshoppers, locusts, mantises, and roaches are _____
orthoptera
toothed insects
odonata
dragonflies and damselflies are _____
odonata
half wings
hemiptera
order that consists of true bugs
hemiptera
bedbug, chinch bug, squash bug, and stinkbug
hemiptera
same wings
homoptera
cicada, scale insects, plant lice, mealybugs, and leafhoppers
homoptera
scale wings
lepidoptera
butterflies and moths
lepidoptera
two winged insects
diptera
fly, gnat, mosquito
diptera
sheath-winged insects
coleoptera
beetle, firefly, and ladybug
coleoptera
membrane-winged insects
hymenoptera
social insects
hymenoptera
ant, bee, wasp
hymenoptera
egg-laying female bee
queen
non-egg-laying female bees
workers
male bees
drones
true or false: honeybee colonies only have one queen
true
true or false: ant colonies have only one queen
false; they can have more than one
small, insect-like arthropods
arachnids
two body regions of spiders
cephalothorax and abdomen
waist of a spider
pedicel
short appendages of a spider that are used to seize and kill or crush its prey
chelicerae
appendages of a spider used to crush and cut the prey
pedipalps
spider circulatory system
open circulatory system
part of a spider respiratory system
book lung
organs that spiders use to spin silk
spinnerets
look like spiders but are not
daddy longlegs (harvestmen)
2 legs per body segment
centipede
4 legs per body segment
millipedes
arachnids mostly active at night that are found in temperate and tropical climates and have a long, segmented abdomen with a stinger
scorpions
parasitic arachnids
mites (cause red, itchy skin) and ticks (transmit disease)
