CBSE Class 3 Science Plants MCQs

Question. A tree is protected by an outer covering called __________.
(a) crown
(b) bark
(c) branch
(d) trunk
Answer: B

Question. Choose the correct option 

Answer: D
Explanation: Grape grows in vines and is considered as a climber.

Question. At which of the following time may a plant be preparing food? 
(a) 6 a.m.
(b) 10 a.m.
(c) 10 p.m.
(d) Midnight
Answer: B
Explanation: Plants can get sufficient sunlight at 10.am and will be able to prepare food.

Question. Look at the two trees below and pick out the correct statement. 

(a) The leaves of both trees have the same shape.
(b) Both trees are water plants.
(c) Both trees have weak stems.
(d) Both trees produce flowers.
Answer: D
Explanation: Both trees produce flowers.

Question. Which part of the sugarcane plant produces juice?
(a) Root
(b) Leaf
(c) Stem
(d) Fruit
Answer: C
Explanation: The stem of sugarcane plant produces juice.

Question. What does fruit contains?
(a) Flower
(b) Stem
(c) Leaf
(d) Seed
Answer: D
Explanation: Seed. Fruits are formed from flowers and have seeds in them. Some fruits like mango have one seed while pear, tomato, papaya have many seeds.

Question. Potato is the modified form of _______
(a) stem
(b) fruit
(c) roof
(d) leaf
Answer: A

Question. Plants can be ________ as well as perennial/evergreen.
(a) permanent
(b) temporary
(c) seasonal
(d) None of these
Answer: C
Explanation: Plants can be Seasonal as well as perennial/evergreen.

Question. Which plant can grow in very low or no water for long period of time?
(a) Mango
(b) Neem
(c) Tulsi
(d) Cactus
Answer: D
Explanation: Cactus can grow in very low or no water for long period of time. That is why they are mostly found in deserts.

Question. In addition to sunlight what else is required for photosynthesis?
(a) Sugar and water
(b) Water and oxygen
(c) Carbon-dioxide and water
(d) Oxygen and carbon-dioxide
Answer: C

Question. Which of the following parts of a plant remains under the ground? 

Answer: D
Explanation: Roots of the plant remain under the ground. Roots fix the plant in the soil and also absorb water and minerals from it to be transported to other parts of the plant.
Other parts shown in the pictures i.e., leaves, stem and fruit remain above the ground.

Question. The ________ hold the seeds.
(a) Roots
(b) Leaves
(c) Stems
(d) Fruits
Answer: A

Question. Which of the following plants can mostly be found in deserts? 

Answer: A
Explanation: Cactus is adapted to live in the hot climate of deserts. Its leaves are reduced into spines (so that less water is evaporated from them) and its fleshy green stem stores water and prepares food for the plant.

Question. Plants grow in soil or in _________. 
(a) water
(b) sky
(c) clouds
(d) none of the above
Answer: A
Explanation: Plants grow in soil as well as in water.

Question. Which part of the cauliflower are you supposed to consume ?
(a) Roots
(b) flower
(c) fruit
(d) stem
Answer: C

Question. Which of the following plants will NOT be able to survive? 

(a) (a) and (b)
(b) (b) and (c)
(c) (c) and (d)
(d) (a), (b) and (c)
Answer: D
Explanation: Roots absorb water and minerals from the soil and then send them to all parts of the plant. Leaves make food for the plant. Plants (a), (b), (c) will not be able to survive as plant (a) lacks roots, plants (b) and (c) lack leaves.

Question. Green plants make their own food. They are called ________.
(a) Predators
(b) Consumers
(c) Decomposers
(d) Producers
Answer: D
Explanation: Producers are the organisms that can make their own food and act as a source of food for other organisms. Thus, green plants are called producers as they can make
their own food and provide it to other organisms.

Question. Read the poems given below and answer the following questions. 
Leaves in the autumn came tumbling down,
Scarlet and yellow, russet and brown,
Leaves in the garden were swept in a heap,
Trees were undressing ready for sleep.
Red leaves and yellow leaves
Orange leaves and brown,
Leaves are dancing everywhere
Happily dancing down.
(A) In the above narrated poem how many colours of leaves are mentioned
(a) Five (b) Seven (c) Four (d) Six
(B) Arrange the leaves in chronological order as how it change colour
1. Orange 2. Yellow 3. Brown 4. Green
(a) 4, 2, 1, 3
(b) 2, 3, 4, 1
(c) 4, 2, 3, 1
(d) 4, 3, 2, 1
Answer: A,D 
Explanation: Six (Yellow, brown, red, scarlet, russet and orange)
(b) (a) While changing colour leaves generally follow this pattern- green, yellow, orange, scarlet, russet, and then brown.

Question. A plant placed in a pot needs __________, _________ and _________ to grow.
(a) Water, wind, fertilizer
(b) Snow, rain, sunlight
(c) Water, sunlight, air
(d) Darkness, water, air
Answer: C
Explanation: A plant needs water, sunlight and air to prepare its food. Food helps the plant to grow.

Question. Match Column-I with Column-II and select the correct option from the codes given below. 
Column-I Column-II
A. Acacia 1. Spices
B. Teak 2. Chocolate
C. Cocoa 3. Furniture
D. Turmeric 4. Rubber
(a) A-3, B-1, C-4, D-2
(b) A-3, B-4, C-2, D-1
(c) A-3, B-2, C-4, D-1
(d) A-4, B-3, C-2, D-1
Answer: D
Explanation: Acacia - Rubber
Teak - Furniture
Cocoa - Chocolate
Turmeric - Spices

Question. Match the following and mark the correct option 

     A B C D
(a) 2 3 4 1
(b) 1 2 3 4
(c) 3 4 2 1
(d) 4 1 3 2
Answer: A

Question. Fill up the blanks with correct options
Leaves make ___(a)___ for the plant and help the plant to breathe. Leaves are also called the food ___(b)___ of the plant. Leaf has a flat and broad part called leaf blade which has tiny holes. These holes are called ___(c)___ . Plants breathe air in and out through these stomata. Leaves contain a substance called ___(d)___. It helps making food using carbon dioxide and water in the presence of sunlight. The process by which plants make their food from air, water and sunlight is called ___(e)___.
a. (a) food (b) sweets (c) water (d) fruits
b. (a) shops (b) factories (c) laboratories (d) malls
c. (a) petals (b) buds (c) stomata (d) holes
d. (a) chlorophyll (b) homophyll (c) tryophyll (d) odonil
e. (a) autosynthesis (b) photosynthesis (c) monosynthesis (d) synthesis
Answer: A
Explanation: Food 2. (b) Factories 3. (c) Stomata 4. (a) Chlorophyll 5. (b) Photosynthesis

Question. Which option will replace “X” in the table. 

(a) Mint
(b) Radish
(c) Ladyfinger
(d) None of the above
Answer: B
Explanation: Radish. In some plants like carrot, radish, turnip and beetroot, roots store food in them.

Question. Match the following and mark the correct option 

Answer: B

Question. Wheat is a ____.
(a) tree
(b) shrubs
(c) grass
(d) climber
Answer: C
Explanation: Wheat is a grass.

Question. Plants get carbon-dioxide from the
(a) soil
(b) sand
(c) leaves
(d) air
Answer: D
Explanation: Plants get carbon-dioxide from the air.

Question. I am round and green. You eat me as a vegetable. 
I carry a baby plant inside me.
Starting from the first letter cross out every alternate letter in the following options and select the one which gives my name.
(a) ACGHLIPLOLSI
(b) APFEOA
(c) SLTASDTYUFRIPNRGEEMR
(d) PSJPEIFNSATCUH
Answer: B
Explanation: Option B gives PEA. We eat seeds of pea plant as vegetable. They are round and green. When they are put in soil they give rise to new pea plants. Other options give CHILLI, LADYFINGER and SPINACH.

Question. If a plant is placed in a dark room it will soon 
(a) Bear fruit
(b) Bear flower
(c) Grow bigger
(d) Grow weak and die
Answer: D
Explanation: If a plant is placed in a dark room it will soon grow weak and die.

Question. Consider the following statements and choose the correct answer
Statement A: Plants clean the air - Plants make the air clean which we use for breathing
Statement B: Trees give us Plastic - We use plastic to make pencil, ladder, box, chair, paper, boat etc.
(a) Statement A is true and B is false.
(b) Statement B is true and A is false.
(c) Both the statements are true.
(d) Both the statements are false.
Answer: A

Question. Jute plant is used to make _______
(a) ropes
(b) medicines
(c) perfumes
(d) spices
Answer: A
Explanation: Jute fibre is used to make sacks, bags, mats and ropes.

Question. Which plant needs external support to stand? 
(a) Herbs
(b) Climbers
(c) Shrubs
(d) Trees
Answer: B
Explanation: Climbers and Creepers grow along the ground or up the sides of walls or trees.
These have a weak stem that is why they need support.

Question. A plant needs ________ to survive.
(a) Food, clothing, electricity
(b) Water, silver, oil, and a place to grow
(c) Air, shelter, gold
(c) Food, water, air, light and a place to grow
Answer: D

Question. Veins : 
(a) absorb water and minerals from the soil.
(b) absorb carbon dioxide from the atmosphere.
(c) transport water, food and minerals in a leaf.
(d) release oxygen and carbon dioxide into the atmosphere.
Answer: C
Explanation: Veins transport water, food and minerals in a leaf.

Question. Leaves are green due to the presence of a green pigment called chlorophyll. The main function of chlorophyll is 
(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 perform photosynthesis in the presence of sunlight, carbon-dioxide and water.
Answer: D
Explanation: Leaves are green due to the presence of a green pigment called chlorophyll. The main function of chlorophyll is to perform photosynthesis in the presence of
sunlight carbon-dioxide and water.

Question. _______ is an oil giving plant.

Answer: D
Explanation: Coconut, olive and groundnut all are oil yielding plants.

Question. Name the green colouring substances that is present in leaves? 
(a) Salt
(b) Carotene
(c) Chlorophyll
(d) All of the above
Answer: C

Question. Which of these is NOT needed for photosynthesis?
(a) Chlorophyll
(b) Sunlight
(c) Oxygen
(d) Water
Answer: C

Question. Amit saw some children plucking leaves from plants while playing in the garden.
What should Amit do?
(a) Join the children and play with them.
(b) Explain them the importance of plants and tell them not to pluck leaves.
(c) Walk pass them without interfearing.
(d) None of the above.
Answer: B
Explanation: Explain them the importance of plants and tell them not to pluck leaves.

Question. Which one of the following fruits is most likely to be inedible? 

Answer: B
Explanation: Poisonous fruit is not fit for eating.

Question. The plant shown in the figure is a _______ 

(a) Thorny plant
(b) Water plant
(c) Land plant
(d) Desert plant
Answer: B
Explanation: The plant shown in the figure is lotus. It is a water plant.

Question. Choose the incorrect statement 
(a) Mint leaves give smell when dried and crushed.
(b) Mango tree has thin and smooth trunk.
(c) Roots of carrot plant store food.
(d) Jasmine flowers are used to make perfumes.
Answer: B
Explanation: Mango trees have thick and rough trunk.

Question. Which gas do plants release into the air?
(a) Oxygen
(b) Hydrogen
(c) Carbon dioxide
(d) Nitrogen
Answer: A

Question. Consider the following statements and choose the correct option.
Statement A: All plants are green.
Statement B: All green plants prepare there own food. 
(a) Statement A is true and B is false.
(b) Statement B is true and A is false.
(c) Both the statements are false.
(d) Both the statements are true.
Answer: B
Explanation: There are non-green plants like mushroom. All green plants prepare their food.

Question. From the box below count and answer how many leaves are there which we use as medicines? 

(a) 4
(b) 5
(c) 6
(d) 7
Answer: B
Explanation: Tulsi, Mint, Aloe Vera, Brahmi, Neem

Question. Which type of plants are harmful to man?
(a) Water plants
(b) Flowering plant
(c) Non-flowering plants
(d) Poisonous plants
Answer: D
Explanation: Poisonous plants

Question. Which of the following part of a plant prepares food? 

Answer: B
Explanation: Leaves are called food factories of the plants because it is the leaves that manufacture the food.

Directions : Read the following passage and answer.
Beena placed a potted plant near the window in a dark room as shown in fig. 1 and noted the direction in which the plant was growing. After few days she rotated the pot in the position as shown in fig. 2. 

Question. What would be her observation after few days ?
(a) The plants began to grow towards left i.e., against the direction of sunlight.
(b) The plant again bent to the right i.e. towards sunlight.
(c) The plant died.
(d) None of these
Answer: B

Question. What does the above experiment prove ?
(a) Plants grow away from sunlight
(b) Plants die in sunlight.
(c) Plants grow towards sunlight.
(d) Plants grow in the presence of air
Answer: C

Question. Arrange the pictures in chronological order 

(a) BCDA
(b) ABCD
(c) DCBA
(d) CDAB
Answer: A

Match Column I with Column II. 

Question. Column-I Column-II
A. Tall and strong plants are called 1 Climbers
B. Plants which grow with the help of support 2 Herbs
C. Short and bushy plants are called 3 Trees
D. Plants which are very short and have soft stems are called 4 Shrubs 
     A B C D
(a) 4 2 1 3
(b) 3 1 4 2
     A B C D
(c) 2 1 4 3
(d) 3 2 1 4
Answer: B

Question. Rose : Shrubs :: Grape : ? 
(a) Tree
(b) Climber
(c) Shrubs
(d) None of these
Answer: B
Explanation: Rose is a shrub while grapes grow in vines which are a climber plant.

Question. The main purpose of a plant’s flower is to :
(a) Provide support
(b) Provide water
(c) Produce food
(d) Produce seeds
Answer: D

Question. Column-I (Functions) Column-II (Parts)
A. It keeps the plant upright and straight 1 Seed
B. It helps the plant stay fixed to the soil. 2 Flower
C. It changes into fruits 
D. It prepares food for the plant 
E. It has a baby plant inside 
     A B C D E
(a) 4 3 2 5 1
(b) 3 4 2 1 5
     A B C D E
(c) 4 1 2 5 3
(d) 3 2 1 4 5
Answer: A

Question. The plant shown in the figure is a ___________

(a) Herb
(b) Shrub
(c) Climber
(d) Tree
Answer: D
Explanation: Big and strong plants are called trees. Coconut plant is a tree

Question. Which statement is NOT true?
(a) A plant comes from a seed
(b) Leaves are attached to the stem
(c) Roots of a plant are usually above the soil
(d) A plant is a living thing that grows
Answer: C

Question. Match the following and choose the correct option 

     A B C D
(a) 3 4 1 2
(b) 1 2 3 4
(c) 4 3 2 1
(d) 2 1 4 3
Answer: A

Question. Several seeds are planted on a hill. Which of the following growths will you see first?
(a) A tree
(b) A bush
(c) A seedling
(d) Roots
Answer: B

Question. Look at the drawings of the three plants below. 

Money plant Banyan tree Sweet potato plant
Which of the following statements about plants can be made from the drawings?
(A) Plants can make food for themselves. (B) Plants have different types of stems.
(C) Plants have different types of roots. (D) Plants can live on land and in water.
(a) A and D only
(b) B and C only
(c) A, B and C only
(d) A, B, C and D
Answer: B
Explanation: B and C only–not all plants can make food for themselves. Plants can live either on land or in water.

Question. Which part of the potato plant absorbs water the most? 

(a) P
(b) Q
(c) R
(d) S
Answer: D
Explanation: ‘P’ is stem, ‘Q’ is leaf, ‘R’ is potato (modified stem) and ‘S’ are roots. Roots absorb water and minerals from the soil and send them to all parts of the plant through
stem.

Question. The given picture shows a potted plant. Which of the following factors may be responsible for such condition of the plant? 

1. No water 2. No light
3. No minerals 4. Attacked by diseases
(a) 1 only
(b) 1 and 2 only
(c) 1, 2 and 4 only
(d) 1, 2, 3 and 4
Answer: C
Explanation: Plants need sunlight, air, water and mineral rich (fertile) soil to grow. It should also be free from diseases. So, lack of water, light and attack by diseases can be the factors responsible for the given conditon of the plant.

Question. Select the statements that show similarities between hibiscus and pea plant?
1. They grow on land. 2. They have flowers.
3. They have weak stems. 4. They produce edible fruits.
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 3 only
(d) 1, 2, 3 and 4
Answer: A
Explanation: Both hibiscus and pea plant are terrestrial flowering plants. Hibiscus is a shrub and has a thin woody stem. Pea plant is a climber and has a weak stem. Pea plant produces edible fruits i.e., peas, whereas hibiscus do not produce any edible fruit.

Question. Study the given flow chart. Identify correct pair of examples of plants P, Q, R and S. 

(a) P - Mustard, Q-Banana
(b) R - Coconut, S - Carrot
(c) P - Rose, S - Mango
(d) Q - Neem, R - Coconut
Answer: D
Explanation: Banana does not have woody stem neither it provide us oil. Carrot does not have woody stem. Rose has woody stem.

Question. In the following list of plants, count the number of shrubs :
Mint, Jasmine, Henna, Pumpkin, Rose, Eucalyptus, Indigo, Money plant, Aloe vera, Lavender, Lemon grass, Coriander, Grapes, Pea tree, Hibicus
(a) 6
(b) 7
(c) 8
(d) 9
Answer: C

Question. Refer the given picture showing process ‘R’ that is carried out in plants at night.
During ‘R’, plants intake gas ‘P’ and release gas ‘Q’. What are P, Q and R? 

           P                Q                   R
(a) Carbon dioxide Oxygen Respiration
(b) Oxygen Carbon dioxide Respiration
(c) Oxygen Carbon dioxide Photosynthesis
(d) Carbon dioxide Oxygen Photosynthesis
Answer: B
Explanation: During day, plants respire as well as photosynthesise but at night, plants respire only. During respiration (R), plants take in oxygen (P) and give out carbon dioxide (Q).