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13 Cards in this Set

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Describe three major adaptations that contribute to the success of insects.
varied life cycles, high reproductive output, small size, hard exoskeleton, jointed appendages
How are insects different from spiders?
Spiders have two body regions, six pairs of appendages, book lungs, simple eyes, and spin silk. Insects generally have three body regions, three pairs of legs, one pair of antennae, spiracles, and compound eyes.
Describe three sensory adaptations of insects.
Insects have compound eyes, antennae, tympanums, and sensitive hairs over parts of the body.
Compare the stages of complete and incomplete metamorphosis.
Compete metamorphosis has found stages: egg, larva, pupa, and adult. Incomplete metamorphosis has three stages: egg, nymph, and adult.
Why might complete metamorphosis have greater adaptive value for an insect than incomplete metamorphosis?
Complete metamorphosis is an advantage because the larvae do not compete with adults for food.
Some plants produce substances that prevent insect larvae from forming pupae. How might this chemical production be a disadvantage to the plant?
Although the larval stage is most destructive to plants, many plants require the adult insects for pollination.
first pair of an arachnid's six pairs of appendages; located near the mouth, they are often modified into pincers or fangs.
chelicerae
second pair of an arachnid's six pairs of appendages that are often adapted for handling food and sensing
pedipalps
silk-producing glands located at the rear of a spider
spinnerets
in insects, series of chemically-controlled changes in body structure from juvenile to adult; may be complete or incomplete
metamorphosis
in insects, the free-living, wormlike stage of metamorphosis, often called a caterpillar.
larva
stage of insect metamorphosis where tissues and organs are broken down and replaced by adult tissues; larva emerges from pupa as a mature adult.
pupa
stage of incomplete metamorphosis where an insect hatching from an egg has the same general appearance as the adult insect but is smaller and sexually immature
nymph