sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
A. sperms of same species are essential
straight
curved
coiled
zig-zag
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
birds
mammals
insects
molluscs
ova
sperm
both and
primary spermatogonia
foregut
midgut
hindgut
somatopleure
vitellogenesis
oogenesis
spermatogenesis
fertilization
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
man
hen's egg
frog
rabbit
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
Spider
Crow
Honeybee
Earthworm
copulation
amphimixis
syngamy
amplexus
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
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
early blastula
late blastula
early gastrula
lategastrula
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
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
3
8
4
12
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
Proteins
Nucleoplasm
DNA
RNA
ectoderm
endoderm
mesoderm
ecto and mesoderm
4-5 years
6-8 years
8 - 10 years
12 -14 years
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
paedogamy
autogamy
isogamy
anisogamy
neurulation
tubulation
crania tion
none of these