Chapter - 8 

 How Do Organisms Reproduce 

āϜীā§ąāĻŦোā§°ে āĻ•েāύেāĻ•ৈ āĻŦংāĻļāĻŦৃāĻĻ্āϧি āϕ⧰ে

EXERCISES:-

āĻŦ্⧟া⧟াāĻŽ:-

1. Asexual reproduction takes place through budding in

ā§§. āωāĻĻীāϝ়āĻŽাāύ ā§° āϜ⧰িāϝ়āϤে āĻ…āϝৌāύ āĻĒ্ā§°āϜāύāύ āĻšāϝ়

(a) amoeba.        (b) yeast.       (c) plasmodium.             (d) leishmania.
(āĻ•) āĻāĻŽিāĻŦা।       (āĻ–) āϚেāύি।       (āĻ—) āĻĒ্āϞাāϜāĻŽোāĻĄিāϝ়াāĻŽ।           (āϘ) āϞিāĻ›āĻŽেāύিāϝ়া।

Answer:-

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

⧍) āϤāϞ⧰ āĻ•োāύāϟো āĻŽাāύুāĻšā§° āύাā§°ী āĻĒ্ā§°āϜāύāύ āϤāύ্āϤ্ā§°ā§° āĻ…ংāĻļ āύāĻšāϝ়?

(a) Ovary         (b) Uterus      (c) Vas deferens           (d) Fallopian tube

(āĻ•) āĻĄিāĻŽ্āĻŦাāĻļāϝ়     (āĻ–) āϜ⧰াāϝ়ু     (āĻ—) āĻ­েāĻ› āĻĄিāĻĢেā§°েāύ্āϏ     (āϘ) āĻĢেāϞ’āĻĒিāϝ়াāύ āϟিāωāĻŦ

Answer:-

3. The anther contains

ā§Š/ āĻāύ্āĻĨাā§°āϤ āĻĨাāĻ•ে

(a) sepals.                (b) ovules.       (c) carpel.          (d) pollen grains.

(āĻ•) āĻĢুāϞ⧰ āĻ—ুāϟি।     (āĻ–) āĻĄিāĻŽ্āĻŦাāĻŖু।        (āĻ—) āĻ•াā§°্āĻĒেāϞ।     (āϘ) āĻĒā§°েāĻ— āĻĻাāύা।

Answer:-

4. What are the advantages of sexual reproduction over asexual reproduction? 

ā§Ē/ āĻ…āϝৌāύ āĻĒ্ā§°āϜāύāύāϤāĻ•ৈ āϝৌāύ āĻĒ্ā§°āϜāύāύ⧰ āϏুāĻŦিāϧা āĻ•ি āĻ•ি?

Answer:-

5. What are the functions performed by the testis in human beings?

ā§Ģ/ āĻŽাāύুāĻšā§° āĻ…āĻŖ্āĻĄāĻ•োāώে āĻ•ি āĻ•ি āĻ•াāĻŽ āϕ⧰ে?

Answer:-

6. Why does menstruation occur?

ā§Ŧ/ āĻ‹āϤুāϏ্ā§°াā§ą āĻ•িāϝ় āĻšāϝ় ?

Answer:-

7. Draw a labelled diagram of the longitudinal section of a flower.

ā§­) āĻĢুāϞ āĻāϟাā§° āĻĻীā§°্āϘাāϝ়িāϤ āĻ…ংāĻļā§° āϞেāĻŦেāϞāϝুāĻ•্āϤ āĻĄাāϝ়েāĻ—্ā§°াāĻŽ āφঁāĻ•িāĻŦ।

Answer:-

8. What are the different methods of contraception?

ā§Ž) āĻ—ā§°্āĻ­āύিā§°োāϧ⧰ āĻŦিāĻ­িāύ্āύ āĻĒāĻĻ্āϧāϤি āĻ•ি āĻ•ি?

Answer:-

9. How are the modes for reproduction different in unicellular and multicellular organisms?

⧝) āĻāĻ•āĻ•োāώী āφ⧰ু āĻŦāĻšুāĻ•োāώী āϜীā§ąāϤ āĻĒ্ā§°āϜāύāύ⧰ āϧ⧰āĻŖ āĻ•েāύেāĻ•ৈ āĻŦেāϞেāĻ— āĻŦেāϞেāĻ—?

Answer:-

10. How does reproduction help in providing stability to populations of species?

ā§§ā§Ļ) āĻĒ্ā§°āϜাāϤিā§° āϜāύāϏংāĻ–্āϝাāĻ• āϏ্āĻĨিāϤিāĻļীāϞāϤা āĻĒ্ā§°āĻĻাāύ āϕ⧰াāϤ āĻĒ্ā§°āϜāύāύে āĻ•েāύেāĻĻā§°ে āϏāĻšাāϝ় āϕ⧰ে?

Answer:-

11. What could be the reasons for adopting contraceptive methods?

ā§§ā§§) āĻ—ā§°্āĻ­āύিā§°োāϧāĻ• āĻĒāĻĻ্āϧāϤি āĻ—্ā§°āĻšāĻŖ āϕ⧰াā§° āĻ•াā§°āĻŖ āĻ•ি āĻš’āĻŦ āĻĒাā§°ে?

Answer:-



Type by - Pinku Moni bora .



Post ID: DABP001672