Chapter 6
āĻ āϧ্ā§াā§ ā§Ŧ
Life Processes
āĻীā§ąāύ āĻĒ্ā§°āĻ্ā§°িāϝ়া
EXERCISES
āĻŦ্ā§াā§াāĻŽ
ā§§/ āĻŽাāύুāĻšā§° āĻŦৃāĻ্āĻāĻŦোā§° āĻŦ্āĻ¯ā§ąāϏ্āĻĨাāĻোā§° āĻāĻা āĻ ংāĻļā§° āĻŦাāĻŦে
(āĻ) āĻĒুāώ্āĻি। (āĻ) āύিāώ্āĻাāĻļāύ।
(āĻ) āĻļ্āĻŦাāϏ-āĻĒ্ā§°āĻļ্āĻŦাāϏ। (āĻ) āĻĒā§°িāĻŦāĻšāĻŖ।
2. The xylem in plants are responsible for
⧍) āĻāĻĻ্āĻিāĻĻāϤ āĻĨāĻা āĻাāĻāϞেāĻŽā§° āĻŦাāĻŦে āĻĻাāϝ়ী
(a) transport of water. (c) transport of amino acids.
(āĻ) āĻĒাāύী āĻĒā§°িāĻŦāĻšāĻŖ। (āĻ) āĻāĻŽিāύো āĻāĻিāĻĄā§° āĻĒā§°িāĻŦāĻšāĻŖ।
(āĻ) āĻাāĻĻ্āϝ āĻĒā§°িāĻŦāĻšāĻŖ। (āĻ) āĻ āĻ্āϏিāĻেāύ⧰ āĻĒā§°িāĻŦāĻšāĻŖ।
3. The autotrophic mode of nutrition requires
ā§Š/ āĻ āĻোāĻ্ā§°āĻĢিāĻ āϧ⧰āĻŖā§° āĻĒুāώ্āĻিā§° āĻĒ্ā§°āϝ়োāĻāύ
(āĻ) āĻাā§°্āĻŦāύ āĻĄাāĻ āĻ āĻ্āϏাāĻāĻĄ āĻā§°ু āĻĒাāύী। (āĻ) āϏূā§°্āϝ্āϝ⧰ āĻĒোāĻšā§°।
(āĻ) āĻ্āϞ’ā§°’āĻĢিāϞ। (āĻ) āĻāĻĒā§°ā§° āϏāĻāϞোāĻŦোā§°।
4. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
ā§Ē) āĻĒাāĻā§°ুāĻেāĻā§° āĻাāĻি āĻাā§°্āĻŦāύ āĻĄাāĻ āĻ āĻ্āϏাāĻāĻĄ, āĻĒাāύী āĻā§°ু āĻļāĻ্āϤি āĻĻিāϝ়া āĻšāϝ়
5. How are fats digested in our bodies? Where does this process take place?
ā§Ģ/ āĻāĻŽাā§° āĻļā§°ীā§°āϤ āĻā§°্āĻŦি āĻেāύেāĻৈ āĻšāĻāĻŽ āĻšāϝ়? āĻāĻ āĻĒ্ā§°āĻ্ā§°িāϝ়াāĻো āĻ’āϤ āϏংāĻāĻিāϤ āĻšāϝ়?
6. What is the role of saliva in the digestion of food?
ā§Ŧ) āĻাāĻĻ্āϝ āĻšāĻāĻŽāϤ āϞাāϞাā§° āĻূāĻŽিāĻা āĻি?
7. What are the necessary conditions for autotrophic nutrition and what are its by products?
ā§/ āĻ āĻোāĻ্ā§°āĻĢিāĻ āĻĒুāώ্āĻিā§° āĻŦাāĻŦে āĻĒ্ā§°āϝ়োāĻāύীāϝ় āĻā§°্āϤāϏāĻŽূāĻš āĻি āĻি āĻā§°ু āĻāϝ়াā§° āĻāĻĒāĻাāϤ āϏাāĻŽāĻ্ā§°ীāϏāĻŽূāĻš āĻি āĻি?
8. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
ā§Ž) āĻā§°োāĻŦিāĻ āĻā§°ু āĻāύাā§°োāĻŦিāĻ āĻļ্āĻŦাāϏ-āĻĒ্ā§°āĻļ্āĻŦাāϏ⧰ āĻŽাāĻāϤ āĻĒাā§°্āĻĨāĻ্āϝ āĻি āĻি? āĻļ্āĻŦাāϏ-āĻĒ্ā§°āĻļ্āĻŦাāϏ⧰ āĻāύাā§°োāĻŦিāĻ āĻĒāĻĻ্āϧāϤি āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻিāĻুāĻŽাāύ āĻীā§ąā§° āύাāĻŽ āϞিāĻা।
9. How are the alveoli designed to maximise the exchange of gases?
⧝) āĻেāĻā§° āĻŦিāύিāĻŽāϝ় āϏ⧰্āĻŦাāϧিāĻ āĻā§°িāĻŦ āĻĒā§°াāĻৈ āĻļ্āĻŦাāϏāύাāϞীāĻŦোā§° āĻেāύেāĻৈ āĻĄিāĻাāĻāύ āĻā§°া āĻšৈāĻে?
10. What would be the consequences of a deficiency of haemoglobin in our bodies?
ā§§ā§Ļ) āĻāĻŽাā§° āĻļā§°ীā§°āϤ āĻšিāĻŽ’āĻ্āϞāĻŦিāύ⧰ āĻ āĻাā§ą āĻš’āϞে āĻি āĻĒā§°িāĻŖāϤি āĻš’āĻŦ?
Ans-
11. Describe double circulation of blood in human beings. Why is it necessary?
ā§§ā§§) āĻŽাāύুāĻšā§° āϤেāĻā§° āĻĻুāĻুāĻŖ āĻĒā§°িāϏāĻ্āĻাāϞāύ āĻŦā§°্āĻŖāύা āĻā§°া। āĻিāϝ় āĻĒ্ā§°āϝ়োāĻāύীāϝ়?
12. What are the differences between the transport of materials in xylem and phloem?
⧧⧍) āĻাāĻāϞেāĻŽ āĻā§°ু āĻĢ্āϞ’āĻāĻŽāϤ āĻĒāĻĻাā§°্āĻĨā§° āĻĒā§°িāĻŦāĻšāĻŖā§° āĻŽাāĻāϤ āĻĒাā§°্āĻĨāĻ্āϝ āĻি?
13. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
ā§§ā§Š) āĻšাāĻঁāĻĢাāĻঁāϤ āĻĨāĻা āĻāϞāĻিāĻ ’āϞি āĻā§°ু āĻŦৃāĻ্āĻā§° āύেāĻĢ্ā§°āύ⧰ āĻাā§°্āϝ্āϝāĻāϞাāĻĒā§° āĻāĻ āύ āĻā§°ু āĻাā§°্āϝ্āϝāĻ্āώāĻŽāϤাā§° āϏৈāϤে āϤুāϞāύা āĻā§°া।
Ans-