When the eggs are released from the ovary of frogs they are at the
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
Correct Answer :
B. secondary oocyte stage
Related Questions
A true coelom is covered by
ectoderm
endoderm
mesoderm
ecto and mesoderm
Constructive change in the development of frog from tadpole is
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
How many cleavages are completed in 16 cell stages of frog's egg ?
3
8
4
12
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these
Which of the following do not show parental care over their young ones ?
mammals
lizards
fowls
earwigs
Cleidoic eggs are found in
birds
mammals
insects
molluscs
Human egg is
centrolecithal
microlecithal
mesolecithal
telolecithal
During normal development the activation of the egg is achieved by
vitellogenesis
oogenesis
spermatogenesis
fertilization
The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
Antifertilizin is secreted by
fertilized egg
spermatozoa
unfertilized egg
egg membranes
In the human female, the primary oocytes remain small without any growth for
4-5 years
6-8 years
8 - 10 years
12 -14 years
Which of the following develops from ectoderm ?
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
Sexual reproduction in larval condition is known as
paedogamy
autogamy
isogamy
anisogamy
In frog's egg the divisoin is
holoblastic
meroblastic
diploblastic
triploblastic
Embryo sac in a hen's egg is formed by
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
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
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
Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
In the growing oocyte, the nucleus enlarges in size due to an increase in
Proteins
Nucleoplasm
DNA
RNA
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
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 nervous system, epidermis and hairs and nails are derivatives of
endoderm
mesoderm
ectoderm
chordomesoderm
Which one has the capacity to reproduce without fertilization of eggs ?
Spider
Crow
Honeybee
Earthworm
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
Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
When the eggs are released from the ovary of frogs they are at the
primary oocyte stage
secondary oocyte stage
ootid stage
matured ova stage
Metamorphosis is a characteristic feature of
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis