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| Question | Answer |
| What is the definition of Metamorphosis? | A change of physical form structure or substance |
| What are the three types of Metamorphosis? | Amiteabelous (bigger), Hemimetabolous (wings), Holometabolous (complete) |
| What is the definition of a niche? | What "you" do to make a living |
| What is an Instar? | the stage of an insect between molts, typically 4-5 before adult |
| What are the 2 main parts of an insect egg? | vitelline Membrane (membranous inside) Chorion Shell The hard outside |
| What are 3 key characteristics of an insect egg? | cytoplasm, nucleus, and yolk |
| What is the purpose of the cytoplasm? | supports developing nucleus |
| What is the function of the nucleus? | Will become the insect itself |
| What is the function of the yolk? | for nutrients |
| How does an insect go from egg to insect? | Mitosis: After fertilization the nucleus divides to form embryo this develops using the yolk's nutrients the cells continue to divide forming a germ layer the germ layer becomes the various tissues and organs of the body |
| What is Polyembryony? | a technique used by insects to lay 100's of identical eggs at a time |
| How does Polyembryony work? | 1 egg splits into several embryos |
| Where is Polyembryony most prevalent? | mostly in parasitic wasps |
| What is Eclosion? | Hatching! |
| What is Diapause? | a dormancy defense mechanism used by all insects |
| What are the 3 reasons an Insect may go into Diapause? | Response to Environmental conditions (too hot or cold) Photoperiod (the sun isn't out as much anymore) Reduced Metabolism |
| What are some of the key characteristics of Diapause? | Obligatory in some insects optional in others & May occur in any life stage |
| Why do insects Molt? | Molting is necessary for growth and metamorphosis in all Arthopods |
| How do insects Molt? | They take in air or water to expand the body then shed the exoskeleton |
| What are the two major stages of Molting? | Apolysis & Ecdysis |
| What is Apolysis? | Seperation of the old cuticle making a new one |
| What is Ecdysis? | shedding the old cuticle |
| What are the Molting Hormones and their functions? | Brain Hormone - (causes positive change) Ecdysone - Molting Hormone (negative) Juvenile Hormone - Youth Hormone (negative) |
| What does the Juvenile Hormone do? | surpresses development of adult features during molting |
| How is Juvenile Hormone produced? | by neurosecretory cells in the brain or glands of the stomatogastric NS |
| How does an Insect Molt (chemically)? | The brain hormone circulates hemolymph when that reaches the prothoracic glands it stimulates the ecdysone The ecdysone triggers molting hormone BOOM Molted Insect |
| *MQ - Where do insects have cuticle? | Foregut, Hindgut , & Trachea |
| What are Imaginal Discs? | anatomical structures of the adult form from dormant discs in the immature when Juvenile Hormone goes away during pupation |
| What triggers Ecdysone in the Molting Process? | Apolysis (separation of epidermis & cell division) + Ecdysis (cuticle splits and shed) |
| What are IGR's? | Insect Growth Regulators |
| What are IGRs used for? | Pesticides |
| What are the pros and cons to IGRs? | general low toxicity to people and animals, safe on pets in environment chitin inhibitors hurt crustaceans and fish may be slow acting 2-10 days may not kill all stages |
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