Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
Correct Answer :
A. parthenogenesis
Related Questions
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
The formation, development and matura- j tion of the female gamete is called
ovulation
oogenesis
vitellogenesis
folliculogenesis
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
The intestine of tadpole is
straight
curved
coiled
zig-zag
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
The process of synthesis of yolk by the oocyte is termed
folliculogenesis
oogenesis
vitellogenesis
spermiogenesis
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
Oral contraceptives check
ovulation
fertilization
implantation
entry of sperms into vagina
The cellular movements during gastrula-tion are called
epiboly
emboly
morphogenetic movements
involution
Which of the following do not show parental care over their young ones ?
mammals
lizards
fowls
earwigs
Grey cresent is present in
zygote of frog
brain of rabbit
eye of frog
retina of cockroach
Which of the following does not show metamorphosis ?
Frog
Housefly
Hydra
Mosquito
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
The sexual embrage of the male and female frogs is called
copulation
amphimixis
syngamy
amplexus
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
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
Which of the following develops from ectoderm ?
Spinal cord and brain
Liver and heart
Eye and skin
Notochord and vertebral colum.
The allantoic vesicle arises from
foregut
midgut
hindgut
somatopleure
During cleavage, the embryo
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
During the development of frog, the ar-chenteron is formed in
early blastula
late blastula
early gastrula
lategastrula
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
Oogonia entering the growth phase of oogenesis is called
primary oocyte
secodnary oocyte
ootid
gonocyte
Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
Embryo sac in a hen's egg is formed by
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
How many cleavages are completed in 16 cell stages of frog's egg ?
3
8
4
12
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these
Constructive change in the development of frog from tadpole is
disappearance of tail
food habit becoming carnivore
land habit
excretion beocmes mesonephric
The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
hyaluronidase
hyaluronic acid
androgamone
cryanogamone