NCERT Grade 10-Life Processes-Questions

NCERT Solutions for Class 10 Science

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Life Processes

Exercise 1

1.    The kidneys in human beings are parts of the system for

(a) nutrition          (b) respiration        (c) excretion       (d) transpiration

2.    The xylem in plants are responsible for

(a) transport of water                      (b) transport of food

(c) transport of amino acids           (d) transport of oxygen

3.    The autotrophic mode of nutrition requires

(a) carbon dioxide and water          (b) chlorophyll

(c) sunlight                                         (d) all of the above

4.    The breakdown of pyruvate to give carbon dioxide, water and energy takes place in

(a) cytoplasm     (b) mitochondria  (c) chloroplast     (d) nucleus

5.    How are fats digested in our bodies? Where does this process take place?

6.    What is the role of saliva in the digestion of food?

7.    What are the necessary conditions for autotrophic nutrition and what are its by-products.

8.   What are differences between aerobic and anaerobic respiration? Name some organisms that use anaerobic mode of respiration.

9.    How are the alveoli designed to maximize the exchange of gases?

10.  What would be the consequence of a deficiency of hemoglobin in our bodies?

11.   Describe double circulation in human beings. Why is it necessary?

12.   What are differences between the transport of materials in xylem and phloem?

13.   Compare the functioning of alveoli in the lungs and nephron in the kidneys with respect to their structure and functioning.

Exercise 2

14.   Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?

15.   What criteria do we use to decide whether something is alive?

16.   What are outside raw materials used for by an organism?

17.   What processes would you consider essential for maintaining life?

Exercise 3

18.   What are difference between autotrophic and heterotrophic nutrition?

19.   Where do plants get each of the raw materials required for photosynthesis?

20.  What is the role of the acids in our stomach?

21.   What is the function of digestive enzymes?

22.   How is small intestine deigned to absorb digested food?

Exercise 4

23.   What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration?

24.   What are different ways in which glucose is oxidized to provide energy in various organisms?

25.   How is oxygen and carbon dioxide transported in human beings?

26.   How are the lungs designed in human beings to maximize the area for exchange of gases?

Exercise 5

27.   What are the components of the transport system in human beings? What are the functions of these components?

28.  Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds?

29.  What are the components of transport system in highly organized plants?

30.  How are water and minerals transported in plants?

31.   How is food transported in plants?

Exercise 6

32.   Describe the structure and functioning of nephron.

33.  What are the methods used by plants to get rid of excretory products?

34.  How is amount of urine produced regulated?

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