Explore topic-wise MCQs in 7th Class.

This section includes 2637 Mcqs, each offering curated multiple-choice questions to sharpen your 7th Class knowledge and support exam preparation. Choose a topic below to get started.

901.

What is the function of the bacteria present in the roots of bean plants

A.  Breaks down nitrates into nitrogen.
B.  Converts ammonium salts into nitrogen.
C.  Converts nitrogen into nitrates.
D.  Converts nitrates into ammonium compounds.
Answer» D.  Converts nitrates into ammonium compounds.
Discussion
902.

Seimy green patches in ponds or in stagnant water

A. Fungi                          
B. Bryophytes
C. Bacteria                      
D. Algae
Answer» E.
Discussion
903.

How many organisms are involved in a symbiotic relationship?

A.  1                                
B.  2
C.  3                                
D.  4
Answer» C.  3                                
Discussion
904.

Which of the following statements is true about the importance of photo-synthesis?

A.  Source of food for all living organisms.
B.  It converts atmospheric carbon dioxide to glucose.
C.  It provides nourishment and helps in the growth and development of plants.
D.  All of these
Answer» E.
Discussion
905.

Which process causes oxygen to enter the atmosphere?

A.  Fat metabolism               
B.  Respiration       
C.         Photosynthesis  
D.         All of these
Answer» D.         All of these
Discussion
906.

Why Cuscuta is called parasite?

A. It climbs on other plants.
B. It deprives the plant (i.e., its host) of valuable nutrients.
C. Both the above are correct.
D. None of the above is correct
Answer» C. Both the above are correct.
Discussion
907.

Carbohydrates, the most abundant biomolecules on Earth are produced by which of the following organisms?

A.  Some bacteria, algae and green plant cells.
B.  All bacteria, fungi and algae.
C.  Fungi, algae and green plant cells.
D.  Viruses, fungi and bacteria.
Answer» B.  All bacteria, fungi and algae.
Discussion
908.

Symbiotic relationship

A. A mode of life in which two organisms live in intimate association with each other
B. Two organisms live together and share the shelter.
C. Two organisms live together and share nutrients.
D. All the above are correct.
Answer» B. Two organisms live together and share the shelter.
Discussion
909.

Which statement describes symbiosis?

A.  A mutually beneficial relationship between two organisms.
B.  Interdependence between two organisms.
C.  Phenomenon in which carnivorous plants kill insects as well as prepare food through photosynthesis.
D.  Dependence on another organism for its habitat.
Answer» B.  Interdependence between two organisms.
Discussion
910.

Chlorophyll

A. It is the green pigment present in the leaves of plants.
B. It is responsible for the green colour of most of the plants.
C. Both the above are correct
D. None of the above is correct
Answer» D. None of the above is correct
Discussion
911.

Nutrition:

A. It is a mode of taking food by an organism
B. It refers to the type of food that an organism takes
C. It is a mode of taking food by an organism and its utilization by the body.
D. All the above are correct
Answer» D. All the above are correct
Discussion
912.

Which statement is true about parasitic plants?

A.  Organisms which prepare food on their own.
B.  Organisms which break glucose into alcohol and carbon dioxide.
C.  Organisms which draw nutrition from living tissues of other plants.
D.  Plants which kill insects for their food.
Answer» D.  Plants which kill insects for their food.
Discussion
913.

In nepenthes plant, leaves are modified into which of the following structures?

A.  Leaf tendrils for mechanical support.
B.  Spines to reduce the loss of water.
C.  Pitchers to trap the insects.
D.  Fleshy leaves to store the food and water.
Answer» D.  Fleshy leaves to store the food and water.
Discussion
914.

Fungi are

A. green in colour
B. white is colour
C. brown in colour
D. green, white, brown or any other colour.
Answer» E.
Discussion
915.

Which function is performed by the bacteria present in the root nodules of leguminous plants?

A.  To store food.
B.  To perform photosynthesis.
C.  To fix the atmospheric nitrogen.
D.  To simplify the complex minerals present in the soil.
Answer» D.  To simplify the complex minerals present in the soil.
Discussion
916.

What is the function of root nodules in leguminous plants?

A.  Store food
B.  Provide extra strength
C.  Perform photosynthesis
D.  Give shelter to bacteria
Answer» E.
Discussion
917.

 Algae is

A. an autotroph    
B. heterotroph
C. virus                            
D. none of these
Answer» B. heterotroph
Discussion
918.

Photosynthesis can occur

A. in green leaves
B. in leaves other than green leaves
C. both the above are correct
D. none of the above is correct
Answer» D. none of the above is correct
Discussion
919.

Fungi does not contain chlorophyll to synthesize their food. Then how do they get their food?

A.  From dead and decaying plants.
B.  By photosynthesis.
C.  By eating small insects which come near it.
D.  From the water we pour near it.
Answer» B.  By photosynthesis.
Discussion
920.

Photosynthesis occurs in which of the following parts of plants?

A. Leaves                        
B. Green stems
C. Green branches          
D. All of these
Answer» E.
Discussion
921.

Leaves are green due to the presence of a green coloured pigment called chlorophyll. Which of the following is the main function of chlorophyll?

A.  To absorb carbon dioxide from the atmosphere.
B.  To absorb water and minerals from the soil.
C.  To give greenish colour to the leaves.
D.  To trap sunlight.
Answer» E.
Discussion
922.

The tiny pores present on the surface of leaves are called

A. cells                             
B. stomata
C. transpiration               
D. none of these
Answer» C. transpiration               
Discussion
923.

Which of the following organisms are found as slimy, green patches on ponds or on stagnant water?

A.  Fungi                                   
B.  Bryophytes
C.  Bacteria              
D.         Algae
Answer» E.
Discussion
924.

Which of the following grow into a new fungi plant?

A. seeds               
B. pollen
C. spores            
D. none of these
Answer» C. spores            
Discussion
925.

Which of the following statements is true about croton plants?

A.  Croton plants do not contain chlorophyll.
B.  Croton plants are dark red in colour. Hence they depend on other plants for food.
C.  Croton plants have chlorophyll but it is hidden by dark red colour pigments.
D.  Croton plants are parasites
Answer» D.  Croton plants are parasites
Discussion
926.

Which of the following parts of a plant are called its "food factories"?

A. Flowers           
B. Seeds
C. Leaves     
D. None of these
Answer» D. None of these
Discussion
927.

How does most carbon dioxide reach into the photosynthesizing cells of a green leaf?

A.  Through the hypodermis of the leaf.
B.  Diffusion through the stomata of the leaf.
C.  Movement through the phloem.
D.  Movement through the xylem.
Answer» C.  Movement through the phloem.
Discussion
928.

The process of taking in and utilizing food for growth and development is known as

A. ingestion        
B. nutrition
C. digestion        
D. all of these
Answer» C. digestion        
Discussion
929.

Which structure in a green plant controls the opening and closing of stomata?

A.  Guard cell                          
B.  Mesophyll         
C.         Phloem              
D.         Xylem
Answer» B.  Mesophyll         
Discussion
930.

Where does most of the transpiration take place in the given figure?

A.  P                                           
B.  R                           
C.  Q                           
D.         S
Answer» D.         S
Discussion
931.

Mainly pulses are the sources of

A. proteins    
B. carbohydrates
C. fats                              
D. None of these
Answer» B. carbohydrates
Discussion
932.

Which of the following words can complete the given table? Organisms Mode of nutrition Cuscuta P Q Insectivorous R Saprophytic

A.  P-Parasitic; Q-Mosquito; R-Algae
B.  P-Autotrophic; Q-Mushroom; R-Yeast
C.  P-Parasitic; Q-Nepenthes; R-Mould
D.  P-Autotrophic; Q-Mushroom; R-Yeast
Answer» D.  P-Autotrophic; Q-Mushroom; R-Yeast
Discussion
933.

Which of the following plants can convert atmospheric nitrogen into soluble form that can be used by plants?

A. Bitter gourd                 
B. Cereals
C. Legumes    
D. Nuts
Answer» D. Nuts
Discussion
934.

Which labelled arrow represents the movement of water?

A.  P                                           
B.  Q                           
C.  R                           
D.         S
Answer» E.
Discussion
935.

Which of the following is necessary for photosynthesis?

A. Carbon dioxide, water and sunlight
B. Carbon dioxide and water only
C. Carbon dioxide, water and chlorophyll
D. Carbon dioxide, water, sunlight and chlorophyll
Answer» E.
Discussion
936.

Which of the following types of nutrition is exhibited by the figure given below?

A.  Autotrophic nutrition.
B.  Saprophytic nutrition.
C.  Parasitic nutrition.
D.  Symbiotic nutrition.
Answer» C.  Parasitic nutrition.
Discussion
937.

DIRECTIONS: Carefully observe pictures given below and answer the following questions. Pitcher plant This plant is an example of

A. Saprophyte                 
B. Insectivore
C. Parasite                      
D. Fungi
Answer» C. Parasite                      
Discussion
938.

DIRECTIONS: Carefully observe pictures given below and answer the following questions. DIRECTION: Look at the given image and answer the given questions: Release of_______ gas is shown by arrow 2.

A. Oxygen           
B. water
C. carbon dioxide            
D. nitrogen
Answer» B. water
Discussion
939.

DIRECTIONS: Carefully observe pictures given below and answer the following questions. DIRECTION: Look at the given image and answer the given questions: Arrow 1 shows

A. release of water and minerals by plants into soil
B. release of \[\text{C}{{\text{O}}_{\text{2}}}\] into the soil
C. release of \[{{\text{O}}_{\text{2}}}\] into the atmosphere
D. absorption of water and minerals by roots from the soil.
Answer» E.
Discussion
940.

DIRECTIONS: Carefully observe pictures given below and answer the following questions.            Which of these can prepare its food?

A.  (i) only
B.  (ii) only
C. Both (i) and (ii)
D. Neither (i) nor (ii)
Answer» B.  (ii) only
Discussion
941.

DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Lichen is a carnivorous plant. (ii) Symbiosis is a mutually beneficial relationship between two organisms. (iii) Amarbel can prepare its own food through Photosynthesis

A. Statements (i) and (iii) are incorrect but (ii) is correct.
B. Statements (i) and (ii) are incorrect but (iii) is correct.
C. All statements are correct.
D. All statements are incorrect.
Answer» C. All statements are correct.
Discussion
942.

DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Without chlorohyll plants can prepare food (ii) All plants have chlorohyll. (iii) Algae do not have chlorophyll.

A. Statements (i) and (iii) are incorrect but (ii) is correct.
B. Statements (i) and (ii) are incorrect but (iii) is correct.
C. All statements are correct.
D. All statements are incorrect.
Answer» E.
Discussion
943.

DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) The bacteria present in root nodules of plants that fix atmospheric nitrogen is blue green algae (ii) In a cactus plant leaves prepare food. (iii) Plants can use atmospheric nitrogen directly

A. Statements (i) and (iii) are incorrect but (ii) is correct.
B. Statements (i) and (ii) are incorrect but (iii) is correct.
C. All statements are correct.
D. All statements are incorrect.
Answer» E.
Discussion
944.

DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) In saprophytic mode of nutrition organisms take the nutrients in solution term form dead and decaying matter. (ii) Fungi is a saprotroph. (iii) Saprotrophs help in recycling of nutrients,

A. Statements (i) and (iii) are incorrect but (ii) is correct.
B. Statements (i) and (ii) are incorrect but (iii) is correct.
C. All statements are correct.
D. All statements are incorrect.
Answer» D. All statements are incorrect.
Discussion
945.

DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Some bacteria are present in root nodules of leguminous plants. Reason (R): Leguminous plants have modulated roots.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
946.

DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): The product of photosynthesis is a complex chemical substance called carbohydrate. Reason (R): The carbohydrate ultimately gets converted into sugar.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
947.

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Seema planted two plants in pot A and pot B. She poured same amount of water into both the pots but she placed pot A out in the open where sunlight can fall on it and pot B in a dark room where there is no sunlight. What will happen to plant A after some days?

A. It will grow in size and form new leaves
B. No change is seen
C. It will die
D. It will become pale
Answer» B. No change is seen
Discussion
948.

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Seema planted two plants in pot A and pot B. She poured same amount of water into both the pots but she placed pot A out in the open where sunlight can fall on it and pot B in a dark room where there is no sunlight. Plants get carbon dioxide from

A. soil       
B. sand
C. leaves             
D. air
Answer» B. sand
Discussion
949.

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 Seema planted two plants in pot A and pot B. She poured same amount of water into both the pots but she placed pot A out in the open where sunlight can fall on it and pot B in a dark room where there is no sunlight. What will happen to plant in pot B after some days?

A. Nothing will happen
B. Grow in size
C. It will die
D. New leaves will grow
Answer» D. New leaves will grow
Discussion
950.

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. The above plant gets its food

A. from photosynthesis
B. from dead and decaying matter
C. by eating small insects
D. from water
Answer» C. by eating small insects
Discussion