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4th Grade > Science

PLANTS MCQs

Total Questions : 40 | Page 1 of 4 pages
Question 1. What are Rabi crops?
  1.    Winter crops
  2.    Summer crops
  3.    Monsoon crops
  4.    None of these
 Discuss Question
Answer: Option A. -> Winter crops
:
A
Crops sown in winters and harvested in spring are called Rabi crops. They are also known as winter crops. For example: wheat, beans, and legumes, etc.
Question 2. Carbon dioxide enters the leaf of a plant through the
  1.    root
  2.    stomata
  3.    stem
  4.    branches
 Discuss Question
Answer: Option B. -> stomata
:
B
Stomata are small pores on the leaves through which gases enter and exit the plant.
Question 3. Kharif crops are harvested in
  1.    June - July
  2.    October - November
  3.    May - June
  4.    April - May
 Discuss Question
Answer: Option B. -> October - November
:
B
TheKharif cropping seasonis from July - October during the monsoon season. Theyinclude rice, maize, sorghum, etc
Question 4. The leaves of cacti are modified into ____ to prevent water loss.
  1.    buds
  2.    tendril
  3.    spines
  4.    tuber
 Discuss Question
Answer: Option C. -> spines
:
C
Desert is the hottest habitat hence preserving water becomes crucial if an organism needs to survive here.
Hence leaves of cacti are modified into spines to prevent loss of water.
Spines also help in the protection of cactus from the animals.
Question 5. Organisms that make their own food are called ___.
  1.    autotrophs
  2.    heterotrophs
  3.    parasites 
  4.    saprophytes 
 Discuss Question
Answer: Option A. -> autotrophs
:
A
The organisms which prepare their own food are called autotrophs. Green plants are examples of autotrophs.
Question 6. Which of the following trees do not shed leaves in winter?
  1.    Oak
  2.    Teak
  3.    Maple
  4.    Walnut
 Discuss Question
Answer: Option B. -> Teak
:
B
Teak does not shed itsleaves in winter. It grows in hilly areas and are evergreen in nature.
Question 7. Crops in India are divided into 2 types on the basis of seasons - ____ and ____.
  1.    Rabi crops, Kharif crops
  2.    Food crops, Cash crops
  3.    Rabi crops, Summer crops
  4.    Kharif crops, Winter crops
 Discuss Question
Answer: Option A. -> Rabi crops, Kharif crops
:
A
Plants of the same kind that are grown in a particular area or region at a particular season are called crops. On the basis of seasons, the crops in India is divided into 2 types - Rabi crops and Kharif crops.
Question 8. Which of the following trees develop cones?
Which Of The Following Trees Develop Cones?
  1.    Pine tree
  2.    Peepal tree
  3.    Neem tree
  4.    Apple tree
 Discuss Question
Answer: Option A. -> Pine tree
:
A
Conifers are cone-bearingplants. Cones bear the seed inside them. Example of conifers are Pine, Redwood and Fir.
Question 9. What is the role of a flower in a plant?
  1.    Reproduction
  2.    Growth
  3.    Respiration
  4.    Germination
 Discuss Question
Answer: Option A. -> Reproduction
:
A
A flower is thereproductive part of the plant. A flower develops into fruitand seeds after fertilization.
Question 10. These Kinds Of Plants Grow in Highly Saline Habitats. Which...
These kinds of plants grow in highly saline habitats. Which plant has these roots?
  1.    Mangroves
  2.    Conifers
  3.    Aquatic
  4.    Desert
 Discuss Question
Answer: Option A. -> Mangroves
:
A
Mangrove trees grow in saline habitat like swamp. These plants develop special adaptations that allow them to survive in water, a special kind of roots called aerial roots which grow above the ground.

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