NCERT Solutions for Class 10 Science Unit 6

Life Processes Class 10

Unit 6 Life Processes Exercise Solutions

Life Process : Various functions carried out by living beings; which are necessary to maintain and continue life are called life process.

Following are the life processes in living beings:-
  • Nutrition
  • Respiration
  • Transport of substances
  • Excretion
  • Movement
  • Reproduction
  • Nutrition
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Question : Solutions of Questions on Page Number : 95

Q1 :  

Why is diffusion insufficient to meet the oxygen requirementsof multi-cellular organisms like humans?


Answer :

Multicellular organisms such as humans possess complex body designs. They have specialised cells and tissues for performing various necessary functions of the body such as intake of food and oxygen. Unlike unicellular organisms, multicellular cells are not in direct contact with the outside environment. Therefore, diffusion cannot meet their oxygen requirements.

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Q2 :  

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


Answer :

Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not. However, a living organism can also have movements, which are not visible to the naked eye. Therefore, the presence of life processes is a fundamental criterion that can be used to decide whether something is alive or not.

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Q3 :  

What are outside raw materials used for by an organism?


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Q4 :  

What processes would you consider essential for maintaining life?


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Q5 :  

What are the differences between autotrophic nutrition and heterotrophic nutrition?


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Q6 :  

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


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Q7 :  

What is the role of the acid in our stomach?


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Q8 :  

What is the function of digestive enzymes?


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Q9 :  

How is the small intestine designed to absorb digested food?


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Q10 :  

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


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Q11 :  

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


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Q12 :  

How is oxygen and carbon dioxide transported in human beings?


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Q13 :  

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


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Q14 :  

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


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Q15 :  

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


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Q16 :  

What are the components of the transport system in highly organised plants?


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Q17 :  

How are water and minerals transported in plants?


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Q18 :  

How is food transported in plants?


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Q19 :  

Describe the structure and functioning of nephrons.


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Q20 :  

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


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Q21 :  

How is the amount of urine produced regulated?


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Exercise : Solutions of Questions on Page Number : 113

Q1 :  

The kidneys in human beings are a part of the system for

(a) nutrition.

(b) respiration.

(c) excretion.

(d) transportation.


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Q2 :  

The xylem in plants are responsible for

(a) transport of water.

(b) transport of food.

(c) transport of amino acids.

(d) transport of oxygen.


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Q3 :  

The autotrophic mode of nutrition requires

(a) carbon dioxide and water.

(b) chlorophyll.

(c) sunlight.

(d) all of the above.


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Q4 :  

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

(a) cytoplasm.

(b) mitochondria.

(c) chloroplast.

(d) nucleus.


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Q5 :  

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


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Q6 :  

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


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Q7 :  

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


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Q8 :  

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


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Q9 :  

How are the alveoli designed to maximise the exchange of gases?


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Q10 :  

What would be the consequences of a deficiency of haemoglobin in our bodies?


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Q11 :  

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


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Q12 :  

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


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Q13 :  

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


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Science : CBSE NCERT Exercise Solutions for Class 10th for Life Processes will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

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