Insect Diversity at University Of Stellenbosch | Flashcards & Summaries

Lernmaterialien für Insect Diversity an der University of Stellenbosch

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What chemical triggers a molt and what does it end?

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Juvenile hormone trigger and it represents the end of a growth stage (instar)

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What forms (3) and occurs (2) post-ecdysis?

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Wax layer, cement layer and endocuticle form and cuticular expansion and sclerotization occurs

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What is the name of the space left by cuticle seperation?

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Exuvial space

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2. Discuss briefly the feeding and nesting habits of the various families of the Isoptera

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Termitidae the most common 80% nest in above ground mounds

Kalotermitidae - nest in trees eating the wood, the most primitive group use pseudergates

Rhinotermitidae - Nest in the soil and eat wood in contact with the soil. also use pseudergates.

Hodotermitidae - Harvester termites - damage lawn grasses, young trees, wallpaper, books and carpets. 

Termopsidae - The least common in RSA, damage little property as nest and eat damp/rotting dead wood. No worker caste but pseudergates too.


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Homology

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Evolutionary related

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Give the name of the structures responsible for diffraction (1)

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Diffraction gratings

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What promotes Ecdysone production (1) in what? (1)

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Pro-thoracico-tropic  Hormone (PTTH) through prothoracic glands

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Physical colours are presented by... (1)  through ... (3)

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By Reflection through

  • Scattering
  • Interference
  • diffraction
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What do high JH levels promote? And no JH?

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Ecdysone to promote larva to larva molts. 

No JH = formation of adult

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What hormone and process 1st takes place in Pre-ecdysis?

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Ecdysone causes epidermal cells to increase.

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characters (advanced, derived)

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Apomorphic

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What does systematics deal with?

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Species diversity and phylogeny

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Q:

What chemical triggers a molt and what does it end?

A:

Juvenile hormone trigger and it represents the end of a growth stage (instar)

Q:

What forms (3) and occurs (2) post-ecdysis?

A:

Wax layer, cement layer and endocuticle form and cuticular expansion and sclerotization occurs

Q:

What is the name of the space left by cuticle seperation?

A:

Exuvial space

Q:

2. Discuss briefly the feeding and nesting habits of the various families of the Isoptera

A:

Termitidae the most common 80% nest in above ground mounds

Kalotermitidae - nest in trees eating the wood, the most primitive group use pseudergates

Rhinotermitidae - Nest in the soil and eat wood in contact with the soil. also use pseudergates.

Hodotermitidae - Harvester termites - damage lawn grasses, young trees, wallpaper, books and carpets. 

Termopsidae - The least common in RSA, damage little property as nest and eat damp/rotting dead wood. No worker caste but pseudergates too.


Q:

Homology

A:

Evolutionary related

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Q:

Give the name of the structures responsible for diffraction (1)

A:

Diffraction gratings

Q:

What promotes Ecdysone production (1) in what? (1)

A:

Pro-thoracico-tropic  Hormone (PTTH) through prothoracic glands

Q:

Physical colours are presented by... (1)  through ... (3)

A:

By Reflection through

  • Scattering
  • Interference
  • diffraction
Q:

What do high JH levels promote? And no JH?

A:

Ecdysone to promote larva to larva molts. 

No JH = formation of adult

Q:

What hormone and process 1st takes place in Pre-ecdysis?

A:

Ecdysone causes epidermal cells to increase.

Q:

characters (advanced, derived)

A:

Apomorphic

Q:

What does systematics deal with?

A:

Species diversity and phylogeny

Insect Diversity

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