Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
Correct Answer :
A. ovulation
Related Questions
Which one has the capacity to reproduce without fertilization of eggs ?
Spider
Crow
Honeybee
Earthworm
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
Oogonia entering the growth phase of oogenesis is called
primary oocyte
secodnary oocyte
ootid
gonocyte
Sexual reproduction in larval condition is known as
paedogamy
autogamy
isogamy
anisogamy
In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called
spermiation
spermiogenesis
spermatogenesis
androgenesis
In the growing oocyte, the nucleus enlarges in size due to an increase in
Proteins
Nucleoplasm
DNA
RNA
The first phase in the sexual reproduction of organisms is
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
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
How many cleavages are completed in 16 cell stages of frog's egg ?
3
8
4
12
Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
Antifertilizin is secreted by
fertilized egg
spermatozoa
unfertilized egg
egg membranes
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
Grey cresent is present in
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
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
If an unfertilized frog's egg is pricked with a micro-needle, it will
die immediately
start dividing
will remain undivided
transform into a tadpole at a faster rate
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis
The intestine of tadpole is
straight
curved
coiled
zig-zag
In frog's egg the divisoin is
holoblastic
meroblastic
diploblastic
triploblastic
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 substance fertilizin is secreted by
ova
sperm
both and
primary spermatogonia
The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
Metamorphosis is a characteristic feature of
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
In frog, gastrulation is completed by
epiboly
emboly
both and
delamination
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 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
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these