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Transcript

  • 1. Insects What are they?
  • 2. Arthropods
    • a hard external skeleton (called a exoskeleton)
    • a segmented body
    • at least three pairs of jointed legs
    • body divided into three major parts
    • have at least one pair of antennae
  • 3. Arthropods
    • they are invertebrates (no backbone)
    • they are cold blooded
    • they are divided into 30 different Orders (groups) based on mouthparts, wings, and development
    • showed up on Earth 400 million years ago
  • 4. Life Cycle
  • 5. Ant Life Cycle
    • The life cycle of the ant consists of four stages: egg, larva, pupa, and adult. Fertilized eggs produce female ants (queens, workers, or soldiers); unfertilized eggs produce male ants.
    • Egg : Ant eggs are oval shaped and tiny (they are on the order of 1 mm long, but the queen's egg is many times larger).
    • Larva : The worm-like larvae have no eyes and no legs; they eat food regurgitated by adult ants. The larvae molt (shed their skin) many times as they increase in size.
    • Pupa : After reaching a certain size, the larva spins a silk-like cocoon around itself (against a solid object, like the wall of the chamber) and pupates. During this time the body metamorphoses (changes) into its adult form.
    • Adult : The pupa emerges as an adult. The entire life cycle usually lasts from 6 to 10 weeks. Some queens can live over 15 years, and some workers can live for up to 7 years.
  • 6. Adaptations
    • Mouthparts – Structure and Function
    • Chewing
    • Sucking
    • Sponging
    • Lapping
  • 7. Chewing Mouthparts
  • 8. Sucking Mouthparts
  • 9. Wings
    • insects developed wings to escape predators and to colonize new habitats
    • wings can provide protection for the softer parts of insects
    • wings also have changed in size to create fast flight times
  • 10. Insect Senses
    • Insects taste using their mouthparts and their FEET-some use their antennae
    • Insects smell using their antennae
    • Insects touch using small hairs found on their bodies (they can feel wind)
    • Insects hear using smalls hairs, usually found on their legs
    • Insects have two compound eyes (for movement, color, and images)
    • Insects can have up to three simple eyes (see light and dark)
  • 11.  
  • 12. Habitats
    • Insects inhabit almost every type of environment except for salt water
    • They can be found on all continents
    • They live in plants, wood, living animals, and fresh water
    • Insects adapt their bodies to the environment that they live in
  • 13. Insect Behavior
    • It is mostly instinctive – instincts are determined by genes before it hatches from an egg
    • They are programmed to eat certain foods, to defend against attack
    • Insects do have the ability to learn – identify locations by sight
    • Insects also learn by trial and error
  • 14. Insect Benefits
    • Eat other pesky insects
    • Eat weeds
    • Eat dead plants and animals
    • Pollinate plants
    • Make honey
    • Make medication
    • Make clothing
    • Beautiful to look at and collect
    • Eaten by other animals
  • 15. Harmful Insects
    • Injury or death from bite or sting
    • Transmit viruses
    • Attack food sources
    • Eat homes