Insects-largest number of invertebrates Have three body parts –Head, thorax, abdomen –Antennae –May or may not have wings –Six legs attached to the thorax –exoskeleton
Insects Why are insects needed for the earth? 1.help to develop medicine 2. helps the chain of life 3.recyclers of the earth
Metamorphis Two kinds of metamorphis –Complete and incomplete –Egg, larva, chrysalis, adult
Incomplete Metamorphis Egg, small (aphid)or a nymph, and adult Nymph-small adult w/o wings Beetles are a great example
Why Study insects? Entomologists are? How many insects are there? 75% of all animals are insects!!
Insects are Arthropods Have jointed legs Exoskeleton Arthro-joints Poda-legs
Spiders/ticks Have two body parts: head abdomen Eight legs No antennae Exoskseleton Spinnerts Lobsters, scorpions