Sunday, November 24, 2024

MCQs Science Olympiad for Class 4, Chapter - Plants

 


1. Which part of the plant absorbs water and nutrients from the soil?

a) Stem
b) Root
c) Leaf
d) Flower
Answer: b) Root


2. What is the process by which plants make their own food?

a) Respiration
b) Digestion
c) Photosynthesis
d) Germination
Answer: c) Photosynthesis


3. What is the green pigment in leaves called?

a) Chlorophyll
b) Carotene
c) Xanthophyll
d) Hemoglobin
Answer: a) Chlorophyll


4. Which of these is not a part of the seed?

a) Embryo
b) Root
c) Seed coat
d) Cotyledon
Answer: b) Root


5. What do seeds need to germinate?

a) Sunlight, water, and soil
b) Air, water, and warmth
c) Minerals, sunlight, and air
d) Soil, heat, and chlorophyll
Answer: b) Air, water, and warmth


6. Which part of the plant is responsible for reproduction?

a) Leaf
b) Flower
c) Stem
d) Root
Answer: b) Flower


7. What is the function of the stem in a plant?

a) To absorb water
b) To make food
c) To transport water and nutrients
d) To protect the seed
Answer: c) To transport water and nutrients


8. Which of these is an example of a climber?

a) Mango tree
b) Money plant
c) Cactus
d) Grass
Answer: b) Money plant


9. What do leaves release during photosynthesis?

a) Carbon dioxide
b) Oxygen
c) Nitrogen
d) Sulfur
Answer: b) Oxygen


10. Which of the following is a desert plant?

a) Pine
b) Cactus
c) Lotus
d) Mango
Answer: b) Cactus


11. Plants use ______ to make their food.

a) Sunlight, carbon dioxide, and water
b) Oxygen, water, and nitrogen
c) Water, nitrogen, and soil
d) Sunlight, oxygen, and nitrogen
Answer: a) Sunlight, carbon dioxide, and water


12. What protects the seed inside a fruit?

a) Stem
b) Seed coat
c) Fruit wall
d) Leaf
Answer: c) Fruit wall


13. Which of the following is not a root vegetable?

a) Potato
b) Carrot
c) Beetroot
d) Radish
Answer: a) Potato


14. Which part of the plant is used to make sugar?

a) Roots
b) Stems of sugarcane
c) Flowers
d) Leaves
Answer: b) Stems of sugarcane


15. Plants with weak stems that need support are called:

a) Creepers
b) Trees
c) Shrubs
d) Climbers
Answer: d) Climbers


16. Which plant has spines instead of leaves?

a) Rose
b) Neem
c) Cactus
d) Mango
Answer: c) Cactus


17. What helps a seed grow into a plant?

a) Photosynthesis
b) Germination
c) Fertilization
d) Transpiration
Answer: b) Germination


18. Which of the following is a non-flowering plant?

a) Mango
b) Rose
c) Fern
d) Sunflower
Answer: c) Fern


19. Which of these is a water plant?

a) Neem
b) Lotus
c) Cactus
d) Bamboo
Answer: b) Lotus


20. What do plants lose during transpiration?

a) Nutrients
b) Water
c) Oxygen
d) Soil
Answer: b) Water


21. Which tree is called the 'Tree of Life'?

a) Mango
b) Banyan
c) Coconut
d) Neem
Answer: c) Coconut


22. Which plant part is used to make tea?

a) Roots
b) Leaves
c) Stem
d) Flowers
Answer: b) Leaves


23. Plants that live for many years are called:

a) Annuals
b) Biennials
c) Perennials
d) Ephemerals
Answer: c) Perennials


24. What is the function of stomata in leaves?

a) Transport water
b) Store food
c) Exchange gases
d) Protect the plant
Answer: c) Exchange gases


25. Which part of the plant stores food in a carrot?

a) Stem
b) Leaf
c) Root
d) Flower
Answer: c) Root


[More questions below]


26. Which of these trees is evergreen?

a) Mango
b) Pine
c) Banyan
d) Neem
Answer: b) Pine


27. What are plants called that grow in salty water?

a) Desert plants
b) Mangroves
c) Grassland plants
d) Water plants
Answer: b) Mangroves


28. Which plant has medicinal value and is used to treat wounds?

a) Aloe vera
b) Rose
c) Cactus
d) Tulsi
Answer: a) Aloe vera


29. What is the function of cotyledons in seeds?

a) To protect the seed
b) To provide nutrients
c) To transport water
d) To help in photosynthesis
Answer: b) To provide nutrients


30. Which part of the banana plant is eaten?

a) Root
b) Leaf
c) Flower and fruit
d) Stem
Answer: c) Flower and fruit


31. What type of venation does a banana leaf have?

a) Parallel
b) Reticulate
c) Both
d) None
Answer: a) Parallel


32. Plants with fibrous roots usually have ______ venation.

a) Parallel
b) Reticulate
c) No venation
d) Spiral
Answer: a) Parallel


33. What is the smallest flowering plant?

a) Duckweed
b) Rose
c) Lotus
d) Tulsi
Answer: a) Duckweed


34. Which of the following is a function of fruits?

a) To transport water
b) To protect seeds
c) To absorb sunlight
d) To make food
Answer: b) To protect seeds


35. What is the edible part of spinach?

a) Stem
b) Leaves
c) Flowers
d) Roots
Answer: b) Leaves


36. Which part of the wheat plant is harvested?

a) Leaves
b) Stems
c) Seeds
d) Roots
Answer: c) Seeds


37. What type of root does a carrot have?

a) Taproot
b) Fibrous root
c) Aerial root
d) Adventitious root
Answer: a) Taproot


38. Which plant traps insects for nutrition?

a) Cactus
b) Rose
c) Pitcher plant
d) Bamboo
Answer: c) Pitcher plant


39. What is the outer covering of a tree's trunk called?

a) Bark
b) Leaf
c) Root
d) Branch
Answer: a) Bark


40. Which type of plant grows close to the ground and spreads?

a) Shrubs
b) Herbs
c) Creepers
d) Climbers
Answer: c) Creepers


41. Which tree has leaves shaped like needles?

a) Neem
b) Pine
c) Banana
d) Banyan
Answer: b) Pine


42. Which plant's seeds are used to make oil?

a) Mustard
b) Wheat
c) Mango
d) Bamboo
Answer: a) Mustard


43. The process of transferring pollen from one flower to another is called:

a) Germination
b) Pollination
c) Photosynthesis
d) Fertilization
Answer: b) Pollination


44. Which of these plants grows from spores instead of seeds?

a) Sunflower
b) Fern
c) Rose
d) Mango
Answer: b) Fern


45. Which plant's leaves close when touched?

a) Lotus
b) Mimosa (Touch-Me-Not)
c) Tulsi
d) Rose
Answer: b) Mimosa (Touch-Me-Not)


46. Which part of the coconut is edible?

a) Shell
b) Seed
c) Root
d) Leaf
Answer: b) Seed


47. Which plant is called the 'King of Fruits'?

a) Apple
b) Banana
c) Mango
d) Grapes
Answer: c) Mango


48. Which of the following plants is used to make rubber?

a) Bamboo
b) Rubber tree
c) Neem
d) Tulsi
Answer: b) Rubber tree


49. What is the process of water loss from plants called?

a) Transpiration
b) Respiration
c) Germination
d) Fertilization
Answer: a) Transpiration


50. Plants that live only for one season are called:

a) Annuals
b) Perennials
c) Biennials
d) Ephemerals
Answer: a) Annuals

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