What processes would you consider essential for the maintenance of life?

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Chapter 5

NCERT

Class 10

Science

Solutions

4. What processes would you consider essential for the maintenance of life?

Question:

What processes would you consider essential for the maintenance of life?

Answer:

All those processes which together do the work of maintenance are called biological processes. In this, nutrition, respiration, transport, excretion are essential processes.

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(All Q's of this Chapter solved)

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Compare the structure and mechanism of alveoli in the lung and nephron in the kidney.

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What is the difference between transport of materials in xylem and phloem?

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

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What can be the consequences of the deficiency of hemoglobin in our body?

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How are alveoli designed for maximum exchange of gases?

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What is the difference between aerobic and anaerobic respiration? Name some organisms which have anaerobic respiration.

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

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What is the role of saliva in digestion of food?

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How does the digestion of fat take place in our body? Where does this process take place?

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By fission of pyruvate, it gives carbon dioxide, water and energy and this reaction takes place in : (a) cytoplasm (b) mitochondria (c) chloroplast (d) Nucleus.

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For autotrophic nutrition _________ is necessary. (a) carbon dioxide and water (b) chlorophyll (c) sunlight (d) all of the above.

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Xylem in plant is responsible for : (a) transport of water (b) transport of food (c) carrying amino acids (d) carrying oxygen

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The kidneys in human beings are a part of the system for (a) nutrition (b) respiration (c) excretion (d) transportation

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How is the amount of urine produced regulated ?

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What methods do plants use to get rid of excretory products?

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Describe the structure and functioning of nephrons.

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How does food transfer in a plant?

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How are water and minerals transported in plants?

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

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

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What are the components of the transport system in humans? What are the functions of these components?

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How is the maximum area in the human lung envisaged for exchange of gases?

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How is oxygen and carbon dioxide transported in humans?

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

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How is a terrestrial organism advantageous over an aquatic organism in obtaining oxygen for respiration?

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How is the small intestine designed to absorb digested food?

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What is the function of digestive enzymes?

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What is the role of acid in our stomach?

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Where does the plant get the raw material needed for photosynthesis?

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What is the difference between autotrophic nutrition and heterotrophic nutrition?

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What raw materials are used by an organism?

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What criterion would we use to determine if an object is alive?

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Why is diffusion insufficient to meet the oxygen requirement in multicellular organisms like us?