Which one of the following correctly describes the location of some body parts in the earthworm Pheretima?

• Two pairs of  accessory glands in 16-18 segments

• Four pairs of spermathecae in 4-7 segments

• One pair of ovaries attached at intersegmental septum of 14th and 15th segments

• One pair of ovaries attached at intersegmental septum of 14th and 15th segments

Which one of the following is the most likely reason of not occurring regular menstruation cycle in females? 

• Fertilisation of the ovum

• maintenance of the hypertrophical endometrial lining

• Maintenance of high concentration of sex hormones in the blood stream

• Maintenance of high concentration of sex hormones in the blood stream

Seminal plasma in human is rich in 

• fructose, calcium and certain enzymes

• fructose and calcium but has no enzymes

• glucose and certain enzymes but has no calcium

• glucose and certain enzymes but has no calcium

The correct sequence of spermatogenetic stages leading to the formation of sperms in mature human testis is

• spermatocyte-spermatoogonia-spermatid-sperms

• spermatogonia-spermatocyte-spermatid

• spermatid-spermatocyte-spermatogonia-sperms,

• spermatid-spermatocyte-spermatogonia-sperms,

In human adult females, oxytocin

• is secreted by the anterior pituitary

• stimulates the growth of mammary glands

• stimulates pituitary to secrete vasopressin

• stimulates pituitary to secrete vasopressin

In humans, at the end of the first meiotic division, the male germ cells differentiate into the

• Primary spermatocytes

• Secondary spermatocytes

• spermatids

• spermatids

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?

• Chorion

• Allantois

• Yolk sac

• Yolk sac

48.

Which one of the following pairs of organs includes only the endocrine glands?

• Parathyroid and adrenal 

• Pancreas and parathyroid

• Thymus and testes

• Thymus and testes

Which part of ovary in mammals acts as an endocrine gland after ovulation?

• Graaffian follicle

• Stroma

• Germinal epithelium

• Germinal epithelium

In the human female, menstruation can be deferred by the administration of

• LH only

• Combination of FSH and LH

• Combination of estrogen and progesterone 

• Combination of estrogen and progesterone