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Selina solutions for Concise Biology Class 7 ICSE chapter 4 - Photosynthesis and Respiration [Latest edition]

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Concise Biology Class 7 ICSE - Shaalaa.com

Chapter 4: Photosynthesis and Respiration

Review questionsreview questionsAdditional questionsExercises

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Review questions

Review questions | Q 1.1

Put a tick (✓ ) against the most appropriate alternative in the following statement.

Carbohydrates are stored by plants in the form of:

  • Vitamins

  • Proteins

  • Fats

  • Glucose

Review questions | Q 1.2

Put a tick (✓ ) against the most appropriate alternative in the following statement. 

Stomata are present on the surface of:

  • Leaves

  • Roots

  • Stem

  • Flower petals 

Review questions | Q 1.3

Put a tick (✓ ) against the most appropriate alternative in the following statement. 

Which one of the following is an end-product of photosynthesis?

  • Fructose

  • Glucose

  • Cellulose

  • Lactose 

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise review questions, Review questions

review questions | Q 1

Short answer question.

Why do leaves generally look green?

Review questions | Q 2

Short answer question.

Which four of the following are needed for photosynthesis in a leaf:
(i) Carbon dioxide:
(ii) Oxygen:
(iii) Nitrates :
(iv) Water:
(v) Chlorophyll:
(vi) Soil:
(vii) Light: 

review questions | Q 3

Short answer question.

What is the source of energy for photosynthesis?

Review questions | Q 4

Short answer question.

Which gas is taken in and which one is given out by the leaf in bright sunlight?  

(i) Taken in :
(ii) Given out:

Review questions | Q 5

Suppose we compare the leaf with a factory, match the items in Column A with those in Column B.

  Column A    Column B 
   Left     Factory 
1 Cells in the leaf  a Raw materials 
2 Chloroplast  b Power 
3 Sunlight  c Machinery 
4 Oxygen and water  d End product 
5 Carbon dioxide and water  e By product 
6 Glucose  f Workroom
Review questions | Q 6.1

State whether the following statement is True or False: 

Green plants prepare their food by using two raw materials, oxygen and water.

  • True

  • False

Review questions | Q 6.2

State whether the following statement is True or False: 

The chlorophyll enables the plants to use light energy.

  • True

  • False

Review questions | Q 6.3

State whether the following statement is True or False: 

The free oxygen in the atmospheric air is the result of photosynthesis.

  • True

  • False

Review questions | Q 6.4

State whether the following statement is True or False:  

Photosynthesis occurs only in chlorophyll-containing parts of the plant. 

  • True

  • False

Review questions | Q 7.1

Differentiate between aerobic and anaerobic respiration. 

Review questions | Q 7.2

Write the overall chemical equations of the two kinds of respiration in plants. 

(i) Aerobic:
(ii) Anaerobic: 

Review questions | Q 8

Explain how photosynthesis is different from respiration.  

Review questions | Q 9

Do the plants respire all day and night or only during the night?

Review questions | Q 10

What happens to the energy liberated during respiration?

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Review questions

Review questions | Q 1

Long answer question.

In order to carry out photosynthesis, what are the substances that a plant must take in? Also mention their sources.

Review questions | Q 2

Long answer question.

What is the role of chlorophyll in photosynthesis?

Review questions | Q 3

Long answer question.

Do plants need oxygen? If so, what is its source?

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Additional questions

Additional questions | Q 1

Answer this question.

What is external respiration?

Additional questions | Q 2

Answer this question.

Write the equation showing the process of respiration.

Additional questions | Q 3

Answer this question.

In what form is the energy released during respiration stored?

Additional questions | Q 4

Answer this question.

Name the two types of respiration.

Additional questions | Q 5

Answer this question.

Name the organ of respiration in fishes.

Additional questions | Q 6

Answer this question.

What are the holes on the sides of the body of insects called?

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Additional questions

Additional questions | Q 1

Answer the following in one word.  

What is the muscular sheet below the lungs called?

Additional questions | Q 2

Answer the following in one word. 

Which organ is called the voice box?

Additional questions | Q 3

Answer the following in one word. 

Which membrane covers the lungs? 

Additional questions | Q 4

Answer the following in one word.

Where does the exchange of gases take place? 

Additional questions | Q 5

Answer the following in one word.

What is formed when oxygen combines with hemoglobin?

Additional questions | Q 6

Answer the following in one word.

What is carbamino hemoglobin?

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Tick the most appropriate answer. 

 The products of respiration are :

  • carbon dioxide and oxygen

  • oxygen and energy

  • carbon dioxide, water, and energy

  • carbon dioxide, oxygen, and energy.  

Exercises | Q 2

Tick the most appropriate answer. 

Glucose is oxidized to produce ethyl alcohol during

  • excretion

  • aerobic respiration

  • anaerobic respiration

  • photosynthesis 

Exercises | Q 3

Tick the most appropriate answer. 

In insects like grasshopper, there is a well-developed system of air tubes called

  • tracheae

  • gills

  • lungs

  • alveoli 

Exercises | Q 4

Tick the most appropriate answer. 

Frogs breathe through the

  • moist skin

  • lungs

  • mouth cavity

  • all of these 

Exercises | Q 5

Tick the most appropriate answer. 

Inside the chest, the trachea divides into two branches called

  • bronchi

  • bronchioles

  • bronchus

  • alveolus 

Exercises | Q 6

Tick the most appropriate answer.  

In humans beings, during inhalation the diaphragm.

  • moves up

  • moves down

  • remains at its position

  • moves down moves up 

Exercises | Q 7

Tick the most appropriate answer.  

Exhaled air contains

  • more carbon dioxide

  • more oxygen

  • more nitrogen

  • more hydrogen 

Exercises | Q 8

Tick the most appropriate answer.  

Plants have these for the exchange of gases.

  • spiracles and stomata

  • lenticels and spiracles

  • lenticels and stomata 

  • buds and flowers

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Fill in the blank.  

The two respiration of respiration are ................ and................... 

Exercises | Q 2

Fill in the blank. 

Muscles of human beings switch to anaerobic ...................... in the absence of oxygen.

Exercises | Q 3

Fill in the blank. 

 In .................. respiration, food is completely oxidized into carbon dioxide, water, and energy.

Exercises | Q 4

Fill in the blank. 

Below the lungs is a muscular sheet called ........................

Exercises | Q 5

Fill in the blank. 

Bronchi divide into smaller tubes called .....................

Exercises | Q 6

Fill in the blank. 

In human beings, the exchange of gases takes place in .................... (lungs).

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

State if the following statement is true or false. Correct the statement if it is false. 

The oxidation of food to release energy and water is called breathing.

  • True

  • False

Exercises | Q 2

State if the following statement is true or false. Correct the statement if it is false. 

Anaerobic respiration takes place in our bones. 

  • True

  • False

Exercises | Q 3

State if the following statement is true or false. Correct the statement if it is false.

The microscopic air sacs present in the lungs are called bronchi. 

  • True

  • False

Exercises | Q 4

State if the following statement is true or false. Correct the statement if it is false.  

Respiration that takes place through the skin is called pulmonary respiration.  

  • True

  • False

Exercises | Q 5

State if the following statement is true or false. Correct the statement if it is false. 

Stomata are present on mature roots and woody stems. 

  • True

  • False

Exercises | Q 6

State if the following statement is true or false. Correct the statement if it is false. 

In photosynthesis, oxygen is released as a by-product

  • True

  • False

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Match the following. 

   Column A    Column B
  (Organism)   (Organ of Respiration)
1 Fish  a Lungs
2 human beings  b tracheae 
3 frog  c gills 
4 cockroach  d moist skin, mouth cavity, and lungs 
5 bird e lungs

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 2

Differentiate between 

External respiration and Internal respiration 

Exercises | Q 3

Differentiate between 

Photosynthesis and Respiration

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Answer the following in short.

Define respiration. 

Exercises | Q 2

Answer the following in short.

What is the full form of ATP? 

Exercises | Q 3

Answer the following in short.

What is the respiratory tract? 

Exercises | Q 4

Answer the following in short.

Define cutaneous respiration?

Exercises | Q 5

Answer the following in short.

What is the function of pleural fluid? 

Exercises | Q 6

Answer the following in short.

What is the role of the diaphragm in breathing mechanism?

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Answer the following in detail.

How is the process of cellular respiration different from breathing?

Exercises | Q 2

Answer the following in detail.

Explain the process of Cellular Respiration.

Exercises | Q 3

Answer the following in detail.

In human beings, what happens to oxygen after it is inhaled through the nose? 

Exercises | Q 4

Answer the following in detail.

Show the mechanism of breathing in human beings.

Exercises | Q 5

Answer the following in detail.

Explain the process of the exchange of gases in plants. 

Selina solutions for Concise Biology Class 7 ICSE Chapter 4 Photosynthesis and Respiration Exercise Exercises

Exercises | Q 1

Number the following organs in the correct order to show the path taken by fresh air at the time of inhalation.
trachea, nose, bronchioles, bronchi, larynx, alveoli, pharynx, lungs

Chapter 4: Photosynthesis and Respiration

Review questionsreview questionsAdditional questionsExercises
Concise Biology Class 7 ICSE - Shaalaa.com

Selina solutions for Concise Biology Class 7 ICSE chapter 4 - Photosynthesis and Respiration

Selina solutions for Concise Biology Class 7 ICSE chapter 4 (Photosynthesis and Respiration) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Concise Biology Class 7 ICSE solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Selina textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Concise Biology Class 7 ICSE chapter 4 Photosynthesis and Respiration are Concept of Photosynthesis - Definition and Basic Process, Factors Affecting Photosynthesis: (Light, Carbon Dioxide, Water, Chlorophyll), Significance of Photosynthesis, Setup., Experiment to Demonstrate the Photosynthesis Process., Basic Process, Word Equation of Respiration, Respiration in Plants - Aerobic and Anaerobic, Respiration and Photosynthesis in Plants, Difference in Respiration and Photosynthesis, Concept for Respiration in Animal.

Using Selina Class 7 solutions Photosynthesis and Respiration exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Selina Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 7 prefer Selina Textbook Solutions to score more in exam.

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