The sexual embrage of the male and female frogs is called
copulation
amphimixis
syngamy
amplexus
Correct Answer :
D. amplexus
Related Questions
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
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 of the following does not show metamorphosis ?
Frog
Housefly
Hydra
Mosquito
Development of egg without fertilization is termed as
parthenogenesis
parthenocarpy
polyembryony
paedogenesis
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
A freshly unfertilised egg of hen contains
one cell
100 cells
1000 cells
10000 cells
During metamorphosis, the disappearance of larval organs is called
histogenesis
paedogenesis
histolysis
paedomorphosis
In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called
spermiation
spermiogenesis
spermatogenesis
androgenesis
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 sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called
hyaluronidase
hyaluronic acid
androgamone
cryanogamone
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 allantoic vesicle arises from
foregut
midgut
hindgut
somatopleure
During the development of frog, the ar-chenteron is formed in
early blastula
late blastula
early gastrula
lategastrula
The substance fertilizin is secreted by
ova
sperm
both and
primary spermatogonia
During cleavage, the embryo
enlarges in size
decreases in size
retains the same size at the beginning
gradually enlarges in size
The formation of the neural tube is known as
neurulation
tubulation
crania tion
none of these
The expulsion of completely developed foetus from the uterus is known as
ovuation
placentation
gestation
parturition
Cleidoic eggs are found in
birds
mammals
insects
molluscs
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
Human beings are
monoecious
dioecius
intersexual
hermaphrodites
Embryo sac in a hen's egg is formed by
ectoderm
meso derm
somatic mesoderm and endoderm
splanchnic mesoderm and ectoderm
Meroblastic cleavage is found in
man
hen's egg
frog
rabbit
In frog's egg the divisoin is
holoblastic
meroblastic
diploblastic
triploblastic
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
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
The cellular movements during gastrula-tion are called
epiboly
emboly
morphogenetic movements
involution
During normal development the activation of the egg is achieved by
vitellogenesis
oogenesis
spermatogenesis
fertilization
Sexual reproduction in larval condition is known as
paedogamy
autogamy
isogamy
anisogamy
How many cleavages are completed in 16 cell stages of frog's egg ?
3
8
4
12
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