flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
C. sperm lysins released from the acrosome
ovulation
oogenesis
vitellogenesis
folliculogenesis
fertilized egg
spermatozoa
unfertilized egg
egg membranes
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
centrolecithal
microlecithal
mesolecithal
telolecithal
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
ovuation
placentation
gestation
parturition
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
Proteins
Nucleoplasm
DNA
RNA
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
monoecious
dioecius
intersexual
hermaphrodites
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
ovulation
fertilization
implantation
entry of sperms into vagina
Frog
Housefly
Hydra
Mosquito
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
vitellogenesis
oogenesis
spermatogenesis
fertilization
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
Spider
Crow
Honeybee
Earthworm
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
endoderm
mesoderm
ectoderm
chordomesoderm
paedogamy
autogamy
isogamy
anisogamy
holoblastic
meroblastic
diploblastic
triploblastic
neurulation
tubulation
crania tion
none of these
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
4-5 years
6-8 years
8 - 10 years
12 -14 years
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
early blastula
late blastula
early gastrula
lategastrula
one cell
100 cells
1000 cells
10000 cells
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
mammals
lizards
fowls
earwigs
primary oocyte
secodnary oocyte
ootid
gonocyte