Study of Scanning Electron Microscope images The relationship - - PowerPoint PPT Presentation

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Study of Scanning Electron Microscope images The relationship - - PowerPoint PPT Presentation

Nov 24, 2023 251 likes •428 views

Study of Scanning Electron Microscope images The relationship between the structure of insects and their mode of living Group A What is an insect? Class: Invertebrates Phylum: Arthropods Three part body: head thorax abdomen Three pairs of

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Study of Scanning Electron Microscope images The relationship between the structure of insects and their mode of living

Group A

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What is an insect?

Class: Invertebrates Phylum: Arthropods Three part body: head thorax abdomen Three pairs of joined legs, compound eyes and a pair of antenna Most diversed animals

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Comparison of differences in structure(legs, eyes and mouth)

Asian Tiger Mosquito Aphid

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Asian tiger mosquito

  • Order: Diptera
  • Blood sucking( female only)
  • Transmission of disease
  • Larvae in polluted water
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Aphid

  • Family: Apidoidea
  • Sap-sucking
  • Live on leaves on trees and

shrubs

  • Most destructive insects

pests

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Legs( magnified by 1.5k) (Asian tiger mosquito)

  • Hooked claws for clinging

to skin

  • Hairy pads for sticking to

smooth surface

  • Water repelling for

standing on water surface

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Legs(Magnified by 800) (Asian Tiger Mosquito)

  • Feathery scales for

walking on water

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Legs(Magnified by 1.2k) (Aphid)

  • Long and thin for

penetrating the stem

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Legs(manified by 6k) (Aphid)

  • Two-jointed , two-clawed

tarsi for clinging on to the stem

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Comparison of legs

CLAWS FEATHERY SCALE HAIRY PADS WATER REPELLENC E SHAPE ASIAN TIGER MOSQUITO

Facing the same direction Yes Yes Yes Long and thin

APHID

C-shaped No No No Long and thin

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Mouth(magnified by 1k) (Asian tiger mosquito)

  • Elongated( in female)
  • Two sensory palps( shorter in

male)

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Mouth(Magnified by 1.5k) (Aphid)

  • Stylets enclosed in rostrum
  • Long and needle like
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Comparison of mouth

SHAPE PRESENCE OF PALPS ENCLOSURE OF ROSTRUM ASIAN TIGER MOSQUITO

Elongated Yes No

APHID

Long and needle like No Yes

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Eyes(magnified by 600) (Asian Tiger mosquito)

  • Compound eyes distinctly

separated

  • Semi circular rows of
  • mmatidia
  • Ability to detect fast

movement

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Eyes(magnified by 8k) (Asian tiger mosquito)

  • Hexagonal
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Eyes(magnified by 2.5k) (Aphid)

  • Two compound eye
  • Circle in shape
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Comparison of eye

NUMBER OF COMPOUND EYES SHAPE OF COMPOUND EYES VIEW ANGLE ASIAN TIGER MOSQUITO

More Hexagonal Large

APHID

Less Circular Large