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09 Metamorphosis - TFTD Metamorphosis Metamorphosis Noun...

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TFTD: Metamorphosis Metamorphosis . Noun. Etymology: Greek, from meta = after + morphē = form 1 : a : change of physical form, structure, or substance b : a striking alteration in appearance, character, or circumstances 2 : a developmental change in the form or structure of an animal (as a butterfly or a frog) occurring subsequent to birth or hatching
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Ametabolous Hemimetabolous Holometabolous
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Instars = stage of an insect between molts Nymphs or larvae Usually 4-5 instars before pupal or adult stage
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The Insect Egg The egg shell of insects is layered much like the exoskeleton and is comprised of a Vitelline membrane Chorion (shell)
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Insect Eggs
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More eggs
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Embryonic Growth Eggs contain cytoplasm , a nucleus and yolk After fertilization the embryo begins development using the yolk to supply its nutrients
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Embryo development The cells continue to divide, forming germ layers that will become the various tissues and organs of the body
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Embryogenesis
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Polyembryony 1 egg splits into several embryos Mostly in parasitic wasps Allows rapid increase in offspring
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Eclosion (hatching) Once fully formed the embryo can either go into diapause or hatch from the egg
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