Chapter 7: How do Organisms Reproducer ?

Multiple Choose Question and Answer :

1. Asexual reproduction takes place through budding in

(a) amoeba.

(b) yeast.

(c) plasmodium.

(d) leishmania.

Answer: (b) yeast.

[ Yeast reproduces asexually by a process called budding, where a small outgrowth forms on the parent cell and eventually separates to become a new individual. ]

2. Which of the following is not a part of the female reproductive system in human beings?

(a) Ovary

(b) Uterus

(c) Vas deferens

(d) Fallopian tube

Answer: (c) Vas deferens

[The Vas deferens is part of the male reproductive system, where it transports sperm.]

3. The anther contains

(a) sepals.

(b) ovules.

(c) carpel.

(d) pollen grains.

Answer: (d) pollen grains.

Answer: (d) pollen grains.

[The Anther is the part of the stamen in a flower that produces and contains pollen grains, which are involved in reproduction.]

Short Question and Answer :

4. What are the advantages of sexual reproduction over asexual reproduction?  [2M]

Answer: Sexual reproduction has several advantages over asexual reproduction. It produces variation in offspring because genes come from two parents, which helps the species adapt to changing environments. This increases the chances of survival when conditions change. It also allows for evolution over time, leading to the development of new traits that can benefit the species. In contrast, asexual reproduction produces identical offspring with no variation.

5. What are the functions performed by the testis in human beings? [2M]

Answer: In human beings, the testis performs two main functions. First, it produces sperms, the male gametes, which are required for fertilisation. Second, it secretes the hormone testosterone, which is responsible for the development of male secondary sexual characteristics such as facial hair, deepening of voice, and muscle growth.

6. Why does menstruation occur? [2M]

Answer: Menstruation occurs when the egg released by the ovary is not fertilised. Each month, the uterus prepares for a possible pregnancy by making its lining thick and spongy to nourish a fertilised egg. Since fertilisation does not happen, this lining is no longer needed and slowly breaks down, coming out of the body as blood and mucus through the vagina. This cycle usually happens once every month and is called menstruation.

Long Question and Answer :

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