The embryo at 16 celled stage is known as
morula
gastrula
blastula
blastomere
A.
morula
Morula is the embryo at the 16 celled stage. It is a mass of cells resulting from the cleavage of the ovum before the formation of a blastula.
Blastomere is any type of cell produced during cleavage.
Blastula is the early developmental stage of a metazoan, following morula stage and consists of single, spherical layer of cells that encloses a hollow, central cavity.
The immediate cause of induction of ovulation in female is the large plasma surge of
progesterone
estradiol
LH
FSH
Refer to the given figure and choose the correct option regarding its parts labelled as A-F
B-Graafian follicle, F-Corpus luteum
C-Graafian follicle, A-Ovum
B-Primary follicle, C-Tertiary follicle showing antrum
E-Corpus callosum, D-Antrum cavity
Grey crescent is the area
at the point of entry of sperm into ovum
just opposite to the site of entry of sperm into ovum
at the animal poles
at the vegetal pole
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
Sertoli cells are found in testis. These cells are
nurse cells
reproductive cells
receptor cells
None of the above
