insect development and life cycle
DESCRIPTION
Insect development and life cycle. INSECTS LARVAE. CAMPODEIFORM elongated, flattened, active Weel developed legs & antennae Many beetles & Neuroptera (lace- wing). CARABIFORM (pg 29) flattened, well-developed legs Carabidae (beetle) short legs, short cerci and a flattened body. - PowerPoint PPT PresentationTRANSCRIPT
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INSECT DEVELOPMENT AND LIFE CYCLE
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INSECTS LARVAE CAMPODEIFORM elongated, flattened, active Weel developed legs & antennae Many beetles & Neuroptera (lace- wing)
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CARABIFORM (pg 29) flattened, well-developed legs Carabidae (beetle) short legs, short cerci and a flattened
body.
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SCARABAEIFORM sluggish, cylindrical, c-shaped well-developed head and thoracic legs Scarabaeidae (beetle)
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ELATERIFORM Wireworm elongate, cylindrical, with a hard
exoskeleton and tiny legs Elateridae (click beetle)
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ERUCIFORM Catterpillar-like Cylindrical, obvious head, short antennae Butterflies and moths
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PLATYFORM Very flattened larva Leg hidden or none Diptera (flies), Lepidoptera, Coleoptera
(beetle)
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VERMIFORM Maggot (berengga) legless, head undeveloped Diptera (flies) circular in cross section and tapering to a
point, they do not possess legs
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INSECTS PUPAE EXARATE (EKSARAT) the appendages, legs etc., are free and
capable of movement Most orders except butterflies
(lepidoptera) & flies (Diptera)
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OBTECT (OBTEK) the legs and other appendages are
closely appressed to the rest of the body not capable of free movement butterflies
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COARCTATE (KOARKTAT) Enclosed within the last larval skin acts as a cocoon protects the pupa flies (Diptera, of the sub-order
Cyclorrhapha.).
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ASEXUAL REPRODUCTION Benefit:
Rapid increase in number Close match between organism & environment Save time: don’t have ti find and court mate
Disadvantage: offspring (anak) not variable 3 modes(cara):
1) HERMAPHRODISM: egg & sperm produce by same individual
2) GYNOGENESIS: egg is activated by the presence of sperm in order to develop. However, the sperm cell does not contribute any genetic material to the offspring.
3) PARTHENOGENESIS: reproduction without fertilization (persenyawaan)
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PARTHENOGENESIS 1) ARRHENOTOKY
unfertilised eggs develop into males Bees, ants, wasps
2) THELYTOKY Unfertilized eggs turn to female aphid
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EGG LAYING use ovipositor variaton:
long, tubular- sticking eggs into hard suface Long-horned grasshopper, parasitic wasp Some are short
ovipositor♀
6-7 cm
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Eggs hatch to produce larva/nymph METAMORPHOSIS:
1) AMETABOLOUS Without metamorphosis or unclear Silverfish (Thysanura)
2) HEMIMETABOLOUS (EXOPTERYGOTA) Incomplete m/morphosis (eggnymph/naiadadult) a) Paurometabolous: the nymph and the adult would
live in the same environment (grasshopper,cricket) b) Heterometabolous: the nymph & adult live in
different environments. For example, Odonata naiad live in the water and cicada nymph underground, whereas the adults are aerial.
3) HOLOMETABOLOUS (ENDOPTERYGOTA) Complete m/morphosis (egglarvapupaadult)
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