Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
Correct Answer :
B. hen's egg
Related Questions
The substance fertilizin is secreted by
ova
sperm
both and
primary spermatogonia
The first phase in the sexual reproduction of organisms is
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called
spermiation
spermiogenesis
spermatogenesis
androgenesis
Grey cresent is present in
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
The intestine of tadpole is
straight
curved
coiled
zig-zag
During fertilization the spermatozoa penetrate through the egg membranes with the help of
flagellum
acrosome
sperm lysins released from the acrosome
mitochondira located at the middle piece
Spermatoliosis is a process by which
the spermatids differentiate into spermatozoa
primary spermatcyte is tarnsformed into a secondary spermatocyte
spermatogonea complete multiplication phase
secondary spermatocyte extrudes polar bodies
In frog's egg the divisoin is
holoblastic
meroblastic
diploblastic
triploblastic
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
A true coelom is covered by
ectoderm
endoderm
mesoderm
ecto and mesoderm
During normal development the activation of the egg is achieved by
vitellogenesis
oogenesis
spermatogenesis
fertilization
Which of the following does not show metamorphosis ?
Frog
Housefly
Hydra
Mosquito
During the development of frog, the ar-chenteron is formed in
early blastula
late blastula
early gastrula
lategastrula
Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
Human beings are
monoecious
dioecius
intersexual
hermaphrodites
In the growing oocyte, the nucleus enlarges in size due to an increase in
Proteins
Nucleoplasm
DNA
RNA
Metamorphosis is a characteristic feature of
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
In forg, the sperms released from the testis take the following route to reach the ureter:
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
The sexual embrage of the male and female frogs is called
copulation
amphimixis
syngamy
amplexus
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis
Blastopore in frogs development occurs in
blastula and opens in blastocoel
blastula and opens in archenteron
gastrula and opens in blastocoel
gastrula and opens in archenteron
Which of the following develops from ectoderm ?
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
Mammalian placenta is
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
During cleavage, the embryo
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
Laternal line system of sense organs present in the skin of tadpole larva
completely disappears during metamorphosis
partialy retained during metamorphosis
partially disappears during later stages of metamorphosis
fully retained in the adult frog
Which one has the capacity to reproduce without fertilization of eggs ?
Spider
Crow
Honeybee
Earthworm
For fertilization of the frog's egg
sperms of same species are essential
sperms do not need penetration
sperms of any animal can fertilize
only presence of male is sufficient
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
Antifertilizin is secreted by
fertilized egg
spermatozoa
unfertilized egg
egg membranes
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit