Flashcards
AEPS - Metamorphosis
Flashcards do conjunto (32)
- 1What is the definition of Metamorphosis?A change of physical form structure or substance
- 2What are the three types of Metamorphosis?Amiteabelous (bigger), Hemimetabolous (wings), Holometabolous (complete)
- 3What is the definition of a niche?What "you" do to make a living
- 4What is an Instar?the stage of an insect between molts, typically 4-5 before adult
- 5What are the 2 main parts of an insect egg?vitelline Membrane (membranous inside)
Chorion Shell The hard outside - 6What are 3 key characteristics of an insect egg?cytoplasm, nucleus, and yolk
- 7What is the purpose of the cytoplasm?supports developing nucleus
- 8What is the function of the nucleus?Will become the insect itself
- 9What is the function of the yolk?for nutrients
- 10How 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 - 11What is Polyembryony?a technique used by insects to lay 100's of identical eggs at a time
- 12How does Polyembryony work?1 egg splits into several embryos
- 13Where is Polyembryony most prevalent?mostly in parasitic wasps
- 14What is Eclosion?Hatching!
- 15What is Diapause?a dormancy defense mechanism used by all insects
- 16What 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 - 17What are some of the key characteristics of Diapause?Obligatory in some insects optional in others
& May occur in any life stage - 18Why do insects Molt?Molting is necessary for growth and metamorphosis in all Arthopods
- 19How do insects Molt?They take in air or water to expand the body then shed the exoskeleton
- 20What are the two major stages of Molting?Apolysis & Ecdysis
- 21What is Apolysis?Seperation of the old cuticle making a new one
- 22What is Ecdysis?shedding the old cuticle
- 23What are the Molting Hormones and their functions?Brain Hormone - (causes positive change)
Ecdysone - Molting Hormone (negative)
Juvenile Hormone - Youth Hormone (negative) - 24What does the Juvenile Hormone do?surpresses development of adult features during molting
- 25How is Juvenile Hormone produced?by neurosecretory cells in the brain or glands of the stomatogastric NS
- 26How 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 - 27*MQ - Where do insects have cuticle?Foregut, Hindgut , & Trachea
- 28What are Imaginal Discs?anatomical structures of the adult form from dormant discs in the immature when Juvenile Hormone goes away during pupation
- 29What triggers Ecdysone in the Molting Process?Apolysis (separation of epidermis & cell division) + Ecdysis (cuticle splits and shed)
- 30What are IGR's?Insect Growth Regulators
- 31What are IGRs used for?Pesticides
- 32What 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
Informações
- Descrição
- AEPS Metamorphosis Notes
- Criado por
- Whitney A · out 2018
- Atualizado
- 24 out 2018
- Visualizações
- 15
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