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

The immediate cause of induction of ovulation in female is the large plasma surge of

• progesterone

• estradiol

• LH

• FSH

Acrosome is formed by

• nucleus

• Golgi apparatus

• mitochondria

• none of these

Accessory sexual character in female is promoted by

• androgen

• progesterone

• estrogen

• testosterone

The embryo at 16 celled stage is known as

• morula

• gastrula

• blastula

• blastomere

Sertoli cells are found in testis. These cells are

• nurse cells

• reproductive cells

• receptor cells

• None of the above

Progesterone is secreted by

• Corpus luteum

• Utreus

• Placenta

• Graafian follicle

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

Ovulation takes place in a month between

• 11-14 day

• 14-16 day

• 15-28 days

• 21-26 day

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