Question

Differentiate between the following pairs of words.
(a) external and internal fertilisation
(b) sexual and asexual reproduction
(c) ovulation and fertilisation
(d) menopause and menarche

Answer 1

(a)

External fertilisation	Internal fertilisation
The gametes are released outside the body and fertilisation takes place outside the body.	The gametes fuses within the body of the female parent.
For example, frogs use external fertilisation.	For example, humans use internal fertilisation.

(b)

Sexual reproduction	Asexual reproduction
It requires two parents and special cells called gametes.	It involves only one parent.
For example, humans use sexual reproduction.	For example, amoebas use asexual reproduction.

(c)

Ovulation	Fertilisation
It is release of ova or eggs from the ovary.	It is the fusion of male and female gametes.

(d)

Menopause	Menarche
It marks the stoppage of the menstrual cycle.	It marks the start of the menstrual cycle.
It occurs at the age of 45-50 years.	It occurs at the age of 10-12 years.