At the time of organogenesis, genes regulate the process at different levels and at different time due to:
Promoter
Regulator
Intron
Exon
Test-tube baby means a baby born when:
The ovum is fertilized externally and there after implanted in the uterus .
It develops from a non-fertilized egg .
It is developed in a test tube .
It is developed through tissue culture method .
The function of copper-T is to prevent:
Fertilization
Egg maturation
Ovulation
Implantation of blastocyst
Which part of ovary in mammals acts as an endocrine gland after ovulation?
Graafian follicle
Stroma
Germinal epithelium
Vitelline membrane
Bartholin's glands are situated:
On either side of vagina in humans
On either side of vas deference in humans
On the sides of the head of some amphibians
At the reduced tail end of birds
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for:
Responsiveness to touch
Interaction with the environment and progressive evolution
Reproduction
Growth and movement
Cleavage in mammalian egg is:
Equal holoblastic
Unequal holoblastic
Superficial meroblastic
Discoidal meroblastic
If mammalian ovum fails to get fertilized, which one of the following is unlikely?
Corpus luteum will disintegrate.
Estrogen secretion further decreases.
Primary follicle starts developing.
Progesterone secretion rapidly declines.
What is true for cleavage?
Size of embryo increases
Size of cells decreases
Size of cells increases
Size of embryo decreases
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is:
Spermatocyte - spermatogonia - spermatid - sperms
Spermatogonia - spermatocyte - spermatid - sperms
Spermatid - spermatocyte - spermatogonia - sperms
Spermatogonia - spermatid - spermatocyte - sperms