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  1. 1. Insects What are they?
  2. 2. Arthropods <ul><li>a hard external skeleton (called a exoskeleton) </li></ul><ul><li>a segmented body </li></ul><ul><li>at least three pairs of jointed legs </li></ul><ul><li>body divided into three major parts </li></ul><ul><li>have at least one pair of antennae </li></ul>
  3. 3. Arthropods <ul><li>they are invertebrates (no backbone) </li></ul><ul><li>they are cold blooded </li></ul><ul><li>they are divided into 30 different Orders (groups) based on mouthparts, wings, and development </li></ul><ul><li>showed up on Earth 400 million years ago </li></ul>
  4. 4. Life Cycle
  5. 5. Ant Life Cycle <ul><li>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. </li></ul><ul><li>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). </li></ul><ul><li>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. </li></ul><ul><li>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. </li></ul><ul><li>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. </li></ul>
  6. 6. Adaptations <ul><li>Mouthparts – Structure and Function </li></ul><ul><li>Chewing </li></ul><ul><li>Sucking </li></ul><ul><li>Sponging </li></ul><ul><li>Lapping </li></ul>
  7. 7. Chewing Mouthparts
  8. 8. Sucking Mouthparts
  9. 9. Wings <ul><li>insects developed wings to escape predators and to colonize new habitats </li></ul><ul><li>wings can provide protection for the softer parts of insects </li></ul><ul><li>wings also have changed in size to create fast flight times </li></ul>
  10. 10. Insect Senses <ul><li>Insects taste using their mouthparts and their FEET-some use their antennae </li></ul><ul><li>Insects smell using their antennae </li></ul><ul><li>Insects touch using small hairs found on their bodies (they can feel wind) </li></ul><ul><li>Insects hear using smalls hairs, usually found on their legs </li></ul><ul><li>Insects have two compound eyes (for movement, color, and images) </li></ul><ul><li>Insects can have up to three simple eyes (see light and dark) </li></ul>
  11. 12. Habitats <ul><li>Insects inhabit almost every type of environment except for salt water </li></ul><ul><li>They can be found on all continents </li></ul><ul><li>They live in plants, wood, living animals, and fresh water </li></ul><ul><li>Insects adapt their bodies to the environment that they live in </li></ul>
  12. 13. Insect Behavior <ul><li>It is mostly instinctive – instincts are determined by genes before it hatches from an egg </li></ul><ul><li>They are programmed to eat certain foods, to defend against attack </li></ul><ul><li>Insects do have the ability to learn – identify locations by sight </li></ul><ul><li>Insects also learn by trial and error </li></ul>
  13. 14. Insect Benefits <ul><li>Eat other pesky insects </li></ul><ul><li>Eat weeds </li></ul><ul><li>Eat dead plants and animals </li></ul><ul><li>Pollinate plants </li></ul><ul><li>Make honey </li></ul><ul><li>Make medication </li></ul><ul><li>Make clothing </li></ul><ul><li>Beautiful to look at and collect </li></ul><ul><li>Eaten by other animals </li></ul>
  14. 15. Harmful Insects <ul><li>Injury or death from bite or sting </li></ul><ul><li>Transmit viruses </li></ul><ul><li>Attack food sources </li></ul><ul><li>Eat homes </li></ul>