Cleidoic eggs are found in
birds
mammals
insects
molluscs
Correct Answer :
B. mammals
Related Questions
Metamorphosis is a characteristic feature of
direct ontogenic development
indirect ontogenic development
chordates
embryogenesis in mammals
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
The intestine of tadpole is
straight
curved
coiled
zig-zag
The sexual embrage of the male and female frogs is called
copulation
amphimixis
syngamy
amplexus
During normal development the activation of the egg is achieved by
vitellogenesis
oogenesis
spermatogenesis
fertilization
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
Antifertilizin is secreted by
fertilized egg
spermatozoa
unfertilized egg
egg membranes
Which of the following develops from ectoderm ?
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
In frog, gastrulation is completed by
epiboly
emboly
both and
delamination
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
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
Which one has the capacity to reproduce without fertilization of eggs ?
Spider
Crow
Honeybee
Earthworm
The cellular movements during gastrula-tion are called
epiboly
emboly
morphogenetic movements
involution
Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these
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
Human egg is
centrolecithal
microlecithal
mesolecithal
telolecithal
The allantoic vesicle arises from
foregut
midgut
hindgut
somatopleure
Human beings are
monoecious
dioecius
intersexual
hermaphrodites
A true coelom is covered by
ectoderm
endoderm
mesoderm
ecto and mesoderm
During metamorphosis, the disappearance of larval organs is called
histogenesis
paedogenesis
histolysis
paedomorphosis
The nervous system, epidermis and hairs and nails are derivatives of
endoderm
mesoderm
ectoderm
chordomesoderm
The first phase in the sexual reproduction of organisms is
spermatogenesis
oogenesis
spermiogenesis
gametogenesis
In the growing oocyte, the nucleus enlarges in size due to an increase in
Proteins
Nucleoplasm
DNA
RNA
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
Which of the following does not show metamorphosis ?
Frog
Housefly
Hydra
Mosquito
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis
Constructive change in the development of frog from tadpole is
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric