fertilized egg
spermatozoa
unfertilized egg
egg membranes
B. spermatozoa
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
Spider
Crow
Honeybee
Earthworm
centrolecithal
microlecithal
mesolecithal
telolecithal
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
vitellogenesis
oogenesis
spermatogenesis
fertilization
4-5 years
6-8 years
8 - 10 years
12 -14 years
birds
mammals
insects
molluscs
endoderm
mesoderm
ectoderm
chordomesoderm
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
epiboly
emboly
both and
delamination
ova
sperm
both and
primary spermatogonia
histogenesis
paedogenesis
histolysis
paedomorphosis
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
copulation
amphimixis
syngamy
amplexus
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
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
Proteins
Nucleoplasm
DNA
RNA
primary oocyte
secodnary oocyte
ootid
gonocyte
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
fertilized egg
spermatozoa
unfertilized egg
egg membranes
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
early blastula
late blastula
early gastrula
lategastrula
ovulation
oogenesis
vitellogenesis
folliculogenesis
neurulation
tubulation
crania tion
none of these
straight
curved
coiled
zig-zag
ovulation
fertilization
implantation
entry of sperms into vagina
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
paedogamy
autogamy
isogamy
anisogamy