1. Differentiate between:

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1. Differentiate between:

Biology | Class 10 | ICSE | Selina | The Reproductive System

1. Differentiate between:

(a) Semen and sperm

(b) Implantation and pregnancy

(c) Follicle and corpus luteum

(d) Amnion and allantois

(e) Prostate gland and Cowper’s gland (the nature of secretion)

(f) Identical twins and fraternal twins

Solution:-

(a)

Semen	Sperm
The mixture of sperms and secretions from the seminal vesicles, prostate, Cowper’s, and urethral glands is referred to as sperm.	The male gamete produced by the testes is sperm.

(b)

Implantation	Pregnancy
Implantation is the process of attaching the blastocyst to the uterine wall/endometrium.	The state of having an unborn child inside one’s body.

(c)

Follicle	Corpus luteum
Follicle is a fluid-filled sac that contains an immature egg, or oocyte During ovulation, a mature egg is released from a follicle.	The ovary’s emptied follicle develops into a hormone-producing tissue called corpus luteum once the ovum is released, and the uterus lining thickens even more.

(d)

Amnion	Allantois
The amnion is a sac that forms around the embryo before the allantois is formed.	The villi are two sets of tiny finger-like projections that make up the placenta. The uterine wall produces one pair of villi, while an extension from the embryo produces the other.

(e)

Prostate gland	Cowper’s gland
As the sperm passes through the urethra, it secretes an alkaline fluid. It neutralises acid in a woman’s vaginal canal.	Cowper’s gland is a lubricating gland that opens into the urethra in human males.

(f)

Identical twins	Fraternal twins
During the early phases of cell division, a single fertilised egg may split and separate into two halves..	At any given time, two eggs are released from the ovaries, and both may be fertilised to generate two persons..

i

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