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Drosophila
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germ band
refers to body of insect during development
germ band extension
refers to body lengthening during development
extended germ band
the stage of maximus body lengthening
phylotypic stage of insect development
phylotypic stage
developmental stage at which members of an animal group most resemble each other
thorax
middle part of body
has 3 segments:
prothorax, mesothorax, metathorax
all segments develop a pair of legs on ventral side
meso and metathorax also develop a pair of wings on dorsal side
dipteran
has 2 wings
parasegments
segmental divisions in the embryo
not quite the same as segments seen in the larva and adult
inside insect body
nerve cord
: central nervous system
on ventral side
heart on dorsal side
oxygen diffuses through tracheal tubes
helometabolous
how does this happen in drosophila
undergoes complete metamorphosis
egg hatches into larva
larva molts twice (so 3 larval stages) then becomes a pupa
: body is remolded to form the adult
much of adult body formed from imaginal discs
Author
sabbyfish
ID
244086
Card Set
Drosophila
Description
test 2
Updated
2013-10-31T04:54:39Z
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