Insects
This presentation is the property of its rightful owner.
Sponsored Links
1 / 8

Insects PowerPoint PPT Presentation


  • 200 Views
  • Uploaded on
  • Presentation posted in: General

Insects. Insects. Insects have thrived for more than 300 million years (long before rise and fall of dinosaurs) Very successful through evolution and adaptation Insects account for ¾ of the earth’s animal species. Characteristics. Adaptations leading to success (all arthropods)

Download Presentation

Insects

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Insects

Insects


Insects1

Insects

  • Insects have thrived for more than 300 million years (long before rise and fall of dinosaurs)

  • Very successful through evolution and adaptation

  • Insects account for ¾ of the earth’s animal species


Characteristics

Characteristics

  • Adaptations leading to success (all arthropods)

    • Segmented body

    • Jointed appendages

    • Exoskeleton


Unique to insects

Unique to Insects

  • Divided into three tagmata

    • Head

    • Thorax

    • Abdomen

  • Have mandibles and one pair of antennae on the head

  • Antennae and other appendages are unbranched

  • Three pairs of jointed legs

  • Many one or two pairs of wings

  • Abdomen has 9 to 11 segments

    • Never has wings or legs in adult

  • Most are small


Entomology

Entomology

  • The study of insects

  • Entomologists classify insects in more than 30 orders

  • Based on:

    • Structure of mouthparts

    • Number of wings

    • Type of development


Success of insects

Success of Insects

  • Insects live almost everywhere on earth (not in deep ocean)

  • Identified more than 700,000 species

  • Estimated 10 million may exist


Success of insects1

Success of Insects

  • Success mainly due to flying

    • Escape predation

    • Move to new environments

  • Exoskeletons

  • Small size = less competition

  • Short life spans and high reproduction rate

    • Natural selection occurs quickly


  • Login