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4th Grade > Science

PLANTS MCQs

Total Questions : 40 | Page 3 of 4 pages
Question 21.


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 22.


Name the part of the plant which produces food.


  1.     Roots
  2.     Stems
  3.     Leaves
  4.     Flowers
 Discuss Question
Answer: Option C. -> Leaves
:
C

The green leaves of plants help produce food with the help of sunlight and chlorophyll. This process where green plants make their own food is called photosynthesis.


Question 23.


Why does the lotus plant have a long hollow stem?


  1.     To help it to float
  2.     To absorb soil
  3.     To make it look beautiful
  4.     To fix the plant
 Discuss Question
Answer: Option A. -> To help it to float
:
A

The lotus plants have hollow and spongy stem filled with air. This makes them light and helps them to float on water. 


Question 24.


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 the reproductive part of the plant. A flower develops into fruit and seeds after fertilization.


Question 25.


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. 


Question 26.


______ is a carnivorous plant.


  1.     Mushroom
  2.     Cuscuta
  3.     Venus Flytrap
  4.     Cactus
 Discuss Question
Answer: Option C. -> Venus Flytrap
:
C

Venus Flytrap is a type of carnivorous plant. They do carry out photosynthesis. But also derive nutrients by trapping and consuming insects.


Question 27.


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 28.


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

The Kharif cropping season is from July - October during the monsoon season. They include rice, maize, sorghum, etc


Question 29.


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-bearing plants. Cones bear the seed inside them. Example of conifers are Pine, Redwood and Fir.


Question 30.


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.

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