Sexual reproduction in animals always requires a) fertilization, the union of sp

Question

Sexual reproduction in animals always requires a) fertilization, the union of sperm and eggs. b) production of sperm c) cloning of animals. d) an aquatic environment. e) fragmentation of a single parent. The follicle mostly secretes a) estrogen b) progesterone c) LH d) FSH e) androgen Which of the follow produces the sperm cells? a) prostate gland b) vas deferens c) testis d) seminal vesicles e) bulbourethral gland Which of the following produces male sex hormones? a) prostate gland b) vas deferens c) testis d) seminal vesicles e) bulbourethral gland The female external reproductive structures include a) the uterus b) the oviducts c) the clitoris and the labia d) the ovaries e) the vagina Which of the following cell types produce large amounts of androgens? a) Sertoli cells. b) Follicle cells c) Sperm cells. d) Oocytes. e) Leydig cells Which of the following hormones triggers ovulation and corpus luteum formation? a) estrogen b) releasing hormones c) FSH d) progesterone e) LH Fertilization forms a a) oocyte b) zygote c) blastula d) gastrula e) larva

Explanation / Answer

22. Sexual reproduction in animals always require

A.Fertilization, the union of sperm and egg.

Since the fertilization is an even in which the male and female gamete fuse with each other to form a zygote which in turn develops into an embryo.

23.Follicle mostly secretes

A.Estrogen

It is a steroid hormone secreted by the matured graffian follicle. It main estrogen secreted is the estradiol.

24.Which of the following produces sperm cells.

C.Testes

Testes are the male gonads that produce the sperm cells which further undergo maturation in the seminiferous tubule.

25.Which of thefollowing produces mal sex hormones

C. Testes

The main male sex hormone testosterone is secreted by the testis

26.The female external reproductive structure includes

E. Vaginaa

Since it is thefemale reproductive organ forthe entry of the male gamates

27. Which cells produce large amount of androgens

E. Leydig cells

These are the cells that produce the steroid hormone androgens in males

28. Which of the following triggers ovulation in females and corpus lehrein formation

E. LH

The rise in level of leutinising hormone LH in females triggers ovulation

29. Fertilization forms a

B. Zygote

This is by the fusion of male gamete with female oocyte.

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