paedogamy
autogamy
isogamy
anisogamy
A. paedogamy
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
neurulation
tubulation
crania tion
none of these
a cord between mother and foetus
place of attachment in uterus wall where exchange of material between mother and foetus takes place
outer covering of foetus
allantoic part of the uterus
4-5 years
6-8 years
8 - 10 years
12 -14 years
Frog
Housefly
Hydra
Mosquito
monoecious
dioecius
intersexual
hermaphrodites
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
copulation
amphimixis
syngamy
amplexus
straight
curved
coiled
zig-zag
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
3
8
4
12
birds
mammals
insects
molluscs
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
ova
sperm
both and
primary spermatogonia
ovulation
oogenesis
vitellogenesis
folliculogenesis
fertilized egg
spermatozoa
unfertilized egg
egg membranes
Spider
Crow
Honeybee
Earthworm
spermiation
spermiogenesis
spermatogenesis
androgenesis
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
epiboly
emboly
morphogenetic movements
involution
epiboly
emboly
both and
delamination
vitellogenesis
oogenesis
spermatogenesis
fertilization
mammals
lizards
fowls
earwigs
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
one cell
100 cells
1000 cells
10000 cells