CLASS INSECTA - PowerPoint PPT Presentation

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CLASS INSECTA

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  1. CLASS INSECTA

  2. General description of the taxon Body is divided into head, thorax and abdomen Have 3 pairs of legs (1 pair on each thoraic segment) They are made of 1 pair multijionted antennae on the head They have a pair of compound eyes attach in the head

  3. Unique and shared features They undergo metamorphosis Their body is covered by exoskeleton Most of them have 1-2 pairs of wings for flying They can be found in colonies

  4. Identification Techniques Body region and structure appearance (head, thorax & abdomen) They are determined for having one pair of antennae They have 3 pairs of legs making a total of 6 legs per individual External respiratory is by spiracles

  5. Classification of the taxon (from kingdom)

  6. The orders found within the taxon Collembola- they are wingless insect example the ants Diptera-made of wings, some are parasites like mosquitoes Hemiptera-consist of triangular back e.gtrue bug

  7. The Close Relative of Class Insecta

  8. The values and threats of the taxon VALUES • Insect like bees facilitates pollination in plants • Some insects are used as food to other animals • They create employment opportunities e.g honey bees THREATS • Deforestation activities destructs their habitats • Bush fire. most of insects found in ground and trees as there habitats • Use of chemical insecticides

  9. Other relevant facts Disadvantages of class insecta includes; Crop destruction e.g grasshoppers Some insect have dangerous venom e.g bees & wasps