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What is special about the insect exoskeleton?
It is made of chitin but hardened by the protein sclerotin.
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What are ocelli?
Photoreceptors without a lense, cannot form images.
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What must occur in order for an insect to grow?
Molting
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What is metamorphosis?
A change in body form.
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What is the time between molts called?
Instar
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What is instar?
The time between molts of an insect.
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What is complete metamorphosis?
- Eggs create larva that feeds and grows.
- Larva pupate where it grows into the adult form.
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What is incomplete metamorphosis?
- Wings develop slowly from small wing buds.
- No pupa stage.
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What is the difference between complete and incomplete metamorphosis?
Incomplete metamorphosis does not have a pupa stage.
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What is direct development?
In wingless insects the juvenile looks like the adult except for size and sexual maturity.
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Where do scientists believe wings evolved from?
Gills
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What are the 8 orders of the class insecta?
- Lepidoptera
- Orthoptera
- Diptera
- Dermaptera
- Hemiptera
- Odonata
- Hymenoptera
- Coleoptera
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What are the key characteristics of the class hymenoptera?
2 pairs of membranous wings with the same texture.
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What are the key characteristics of the class lepidoptera?
- Powdery-like scales on wings.
- Mouth coiled beneath head.
- 2 pairs of similar texture wings.
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What are the key characteristics of the class orthoptera?
- Large hind legs for jumping.
- No wings.
- 1 pair of Cerci (tails)
- Antennae thread-like.
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What are the key characteristics of the class diptera?
One pair of membranous wings.
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What are the key characteristics of the class dermoptera?
- 2 Pairs of wings:
- Front wings short/leathery.
- Hind wings membranous.
- Flattened body.
- Pinchers/forcep-like cerci.
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What are the key characteristics of the class hemiptera?
- Mouth positioned in front of the eyes.
- Thick front wings
- Membranous back wings
- Front and back wings positioned in a triangle pattern overlapping.
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What are the key characteristics of the class odonata?
- Very large eyes.
- Long, thin wings.
- Slender, needle-like body.
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What are the key characteristics of the class coleoptera?
- Hard, shell-like front wings.
- Back wings encased underneath front wings.
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What order are bees, wasps, and ants in?
Hymenoptera
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What order are moths in?
Lepidoptera
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What order are crickets in?
Orthoptera
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What order are flies in?
Diptera
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What order are earwigs in?
Dermaptera
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What order are shield bugs in?
Hemiptera
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What order are dragonflies in?
Odonata
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What order are beetles in?
Coleoptera
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What order is this insect in, and what distinguishing features does it have?
- Hymenoptera
- 2 pairs of membranous wings of the same texture.
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What order is this insect in, and what distinguishing features does it have?
- Lepidoptera
- Powdery-like scales on wings.
- Wings similar texture.
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What order is this insect in, and what distinguishing features does it have?
- Orthoptera
- Large hind legs for jumping.
- Cerci
- Thread-like antennae.
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What order is this insect in, and what distinguishing features does it have?
- Diptera
- One pair of membranous wings.
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What order is this insect in, and what distinguishing features does it have?
- Dermaptera
- Pincher-like cerci
- Leathery front wings.
- Membranous back wings.
- Flattened body.
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What order is this insect in, and what distinguishing features does it have?
- Hemiptera
- Mouth positioned in front of eyes.
- Front and back wings crossed in a triangle pattern.
- Front wings thick
- Back wings membranous
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What order is this insect in, and what distinguishing features does it have?
- Odonata
- Very large eyes
- Long, thin wings.
- Long, thin bodies.
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What order is this insect in, and what distinguishing features does it have?
- Coleoptera
- Shell-like front wings encasing the backwings.
- Backwings membranous.
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