BIOC19H3 Lecture Notes - Rhodnius Prolixus, Corpus Allatum, Hemimetabolism
Document Summary
Top row shows a caterpillar pupa butterfly. The dragonfly"s life stages are different because they inhabit different environments (juvenile in water while the adult is on land) Types of insect metamorphosis (slide 4: ametabolous (without metamorphosis) Life cycle: egg immature form adult. Adults differ from immature forms in size and maturity of reproductive organs. Types of insect metamorphosis (slide 5: parametabolous (gradual metamorphosis) Life cycle: egg nymphal instar adult. Adults differ from immature forms in size and in possession of fully developed reproductive organs, but also adults have wings. Wings develop externally and gradually with each molt: wingless wing bud wings. Young and adult forms live in same environment, eat same food and have same life style. Types of insect metamorphosis (slide 6: hemimetabolous (incomplete metamorphosis) Life cycle: egg naiad instar adult. Same as parametabolous, but young and adult forms do not live in same environment. Eggs laid underwater naiad hatches undergoes successive molts adult lives outside of water.
