the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
A. the spermatids differentiate into spermatozoa
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
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
endoderm
mesoderm
ectoderm
chordomesoderm
ovulation
fertilization
implantation
entry of sperms into vagina
Proteins
Nucleoplasm
DNA
RNA
man
hen's egg
frog
rabbit
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
ectoderm
endoderm
mesoderm
ecto and mesoderm
die immediately
start dividing
will remain undivided
transform into a tadpole at a faster rate
paedogamy
autogamy
isogamy
anisogamy
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
epiboly
emboly
morphogenetic movements
involution
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
one cell
100 cells
1000 cells
10000 cells
foregut
midgut
hindgut
somatopleure
ova
sperm
both and
primary spermatogonia
straight
curved
coiled
zig-zag
vitellogenesis
oogenesis
spermatogenesis
fertilization
ovuation
placentation
gestation
parturition
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
early blastula
late blastula
early gastrula
lategastrula
spermiation
spermiogenesis
spermatogenesis
androgenesis
histogenesis
paedogenesis
histolysis
paedomorphosis
holoblastic
meroblastic
diploblastic
triploblastic
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
epiboly
emboly
both and
delamination
monoecious
dioecius
intersexual
hermaphrodites