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Insect Biology > Lecture 3 > Flashcards

Lecture 3 Flashcards

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1
Q

What are the three main patterns of development?

A

Ametaboly, hemimetaboly, holometaboly

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2
Q

What is ametaboly?

A

Little change in body form except for sexual maturation

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3
Q

what is hemimetaboly?

A

Gradual change in body form with external wing buds getting larger at each molt

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4
Q

what is holometaboly?

A

An abrupt change from a wingless immature insect to winged adult stage via a pupa stage

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5
Q

What are the three parts of the cuticle?

A

Epicuticle, exocuticle, endocuticle

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6
Q

What does the cuticle do?

A

Prevents water loss, maintains homeostasis, strong exoskeleton

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7
Q

What do the cuticle and epidermis together form?

A

Integument

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8
Q

What is the epidermis

A

single layer of cells that secretes the cuticle

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9
Q

What are the four cuticular extension types

A

Multicellular spine, seta/sensillium/macrotichia, acanthae and microtrichia

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10
Q

What are the two ways that colour is produced by insects

A

Physical colors resulting from light scattering/diffraction, pigmentary colours due to absorption of visible light by chemicals

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11
Q

What functions do colours have for insects?

A

Sexual displays, defenses, protection from UV/heat

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12
Q

What are the 4 mouthparts

A

labrum, mandibles, hypopharynx, labium

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13
Q

What is the labrum

A

front lip to contain food

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14
Q

what is the mandible

A

pair of jaws for crushing/grinding, goes side to side

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15
Q

what is the hypopharynx?

A

tongue like process mixes food and saliva

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16
Q

what is the labium?

A

back lip, pair of appendages fused together

17
Q

What are the 4 functions of antennae?

A

Chemoreceptors, mechanoreceptors, thermoreceptors and hygroreceptors

18
Q

What are the three components of the thorax?

A

prothorax, mesothorax and metathorax

19
Q

What two components form the pterothorax in some insects?

A

mesothorax and metothorax

20
Q

how many pairs of legs do insects have

A

3

21
Q

What are the six segments of a leg

A

coxa, trochanter, femur , tibia, tarsus, tarsal claws

22
Q

What is a tegmen

A

forewing modification, leathery front wing

23
Q

What is elytra

A

hardened forewing

24
Q

What are halteres

A

reduced hindwing, protected by calypters

25
Q

What kind of flight do frilled wings produce

A

clap and cling flight

Insect Biology (7 decks)

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