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
B. place of attachment in uterus wall where exchange of material between mother and foetus takes place
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
paedogamy
autogamy
isogamy
anisogamy
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
ova
sperm
both and
primary spermatogonia
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
neurulation
tubulation
crania tion
none of these
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
ovuation
placentation
gestation
parturition
primary oocyte
secodnary oocyte
ootid
gonocyte
vitellogenesis
oogenesis
spermatogenesis
fertilization
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
4-5 years
6-8 years
8 - 10 years
12 -14 years
endoderm
mesoderm
ectoderm
chordomesoderm
ovulation
oogenesis
vitellogenesis
folliculogenesis
Spider
Crow
Honeybee
Earthworm
holoblastic
meroblastic
diploblastic
triploblastic
ectoderm
endoderm
mesoderm
ecto and mesoderm
Frog
Housefly
Hydra
Mosquito
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
histogenesis
paedogenesis
histolysis
paedomorphosis
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
mammals
lizards
fowls
earwigs
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
early blastula
late blastula
early gastrula
lategastrula
3
8
4
12
foregut
midgut
hindgut
somatopleure