spermatogenesis
oogenesis
spermiogenesis
gametogenesis
D. gametogenesis
histogenesis
paedogenesis
histolysis
paedomorphosis
Vasa efferentia, Bidder's canal, uriniferous tubule and nephrotome
Vasa efferentia, Bidder's canal, and uriniferous tubule
Vasa efferentia, uriniferous tubule nd Bidder's canal.
Vasa deferentia, uriniferous tubule and Bidder's canal
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
man
hen's egg
frog
rabbit
neurulation
tubulation
crania tion
none of these
4-5 years
6-8 years
8 - 10 years
12 -14 years
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
monoecious
dioecius
intersexual
hermaphrodites
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
die immediately
start dividing
will remain undivided
transform into a tadpole at a faster rate
foregut
midgut
hindgut
somatopleure
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
3
8
4
12
Spider
Crow
Honeybee
Earthworm
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
ova
sperm
both and
primary spermatogonia
ovuation
placentation
gestation
parturition
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
vitellogenesis
oogenesis
spermatogenesis
fertilization
straight
curved
coiled
zig-zag
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
spermiation
spermiogenesis
spermatogenesis
androgenesis
ectoderm
endoderm
mesoderm
ecto and mesoderm
copulation
amphimixis
syngamy
amplexus
zygote of frog
brain of rabbit
eye of frog
retina of cockroach