The gestation period of elephant is about
11 months
10 months
15 months
22 months
Correct Answer :
D. 22 months
Related Questions
Sertoli cells are located in
caput epididymis
cauda epididymis
seminiferous tubules
germinal epithelium
The human sperm was first seen and described by
Hamm and Leeuwenhock
Spallazani
De Graff
VonBaer
Placenta is the region, where
foetus is supplied by maternal blood
foetus receives maternal blood and nutrition
embryo is enclosed by membranes
embryo is attached to mother by umbilical cord
Secodary sexual character in man is
breast
thyroid
ovary
testis and ovaries
Gestation period in man is a about
10 weeks
28 weeks
32 weeks
35 weeks
The site of fertilization in the female mammalian reproductive system is
vagina
uterus
fallopian tube
ovarian fimbriae
In which of the animals, the fertilization occurs externally in water ?
Hydra
Earthworm
Frog
Cockroach
The testes secrete a group of hormones called
progestogens
androgens
estrogens
tropic hormones
In the human menstrual cycle, ovulation occurs around
day 10
day 14
day 8
day 22
The structure formed after release of ova from Graffian follicles and secretory in nature, is
corpus callosum
corpus luteum
corpus albicans
corpus striatum
Sustentacular cells are found in
testis of mammals
testis of Ascaris
ovary of mammals
pancreas of frog
The simplest type of placenta found in man is
Haemochorial
Epitheliochorial
Syndesmochorial
Haemo-endothelial
Cryptorchidism is a condition in which testes are
surgically removed
not developed in foetus
unable to produce sperms
unable to descend into scrotal sacs
Those person in which testes does not descend into scrotal sac
show normal secondary sexual characters as the Leydig cells are unaffected
are normal in every respect except that they lack ability to procreate
the testes are comparatively smaller in size
all of these
Failure of descending testis into the scrotum is known as
paedogenes
castration
cryptorchidism
impotency
The female rabbit is
spontaneous ovulator
seasonal ovulator
induced ovulator
natural ovulator
One of the following accessory glands in the male reproductive system produces secretions that neutralise the acidity in the urethra and in the female genital tract. This is necessary for survival of sperms. This fluid is secreted by
seminal vesicle
prostrate gland
cowper's gland
coagulating gland
In the testis of rabbit, the hormone secreting cells are
spermatogonia
spermatocytes
sustentacular cells
cells of Leydig
The part of reproductive system in male which neither produces hormones nor sperms is
seminal vesicles
cowper's glands
prostrate glands
all of these
Which of the following animals are hermaphrodites?
Tapeworm
Leech
Earthworm
All of these
Gubernaculun connects
testis to scrotum
ovary to the body wall in abdomen
the two muscles
the two bones
Allantois of the mammalian embryo helps in
respiration
excretion
protection
nutrition
The sperm count increases
if a person takes hot bath at 43 - 45°C for 30 minutes per day
if a person wears althletic supporters
during summer months
during winter months
Amnion helps in
respiration
excretion
nutrition
protection from shocks
Amniotic fluid protects the foetus from
degeneration
encystment
jerks
none of these
After a sperm has entered an ovum in the process of fertilization, entry of further sperms is prevented by
development of the vitelline membrane
development of the pigment coat
condensation of yolk
formation of fertilization membrane
The testis are found in the abdomen in
kangaroo
elephant
rabbit
goat
The seminal vesicle in rabbit is found at the junction of
prostrate and Cowper's glands
porstrate and vasa deferens
prostrate and urethra
vasa deferens and testis
Embryo of a mammal is surrounded by
yolk
amniotfe fluid
both
none of these
Fertilizers are substances emitted from
mature eggs
immature eggs
sperms
polar body