Free Plants 02 Practice Test - 4th Grade 

Question 1

Leaves of plants are green in colour due to the presence of:

A. chlorophyll
B. proteins
C. minerals
D. fats

SOLUTION

Solution : A

Chlorophyll is a pigment that imparts green colour to the leaves. Plants require chlorophyll along with sunlight to prepare food.

Question 2

Which of the following parts of the potato plant help it to reproduce?

A.

Bud

B.

Flower

C.

Leaf

D.

Root

SOLUTION

Solution : A

Potato is a special kind of stem, which grows underground. It has buds called ‛eye’ on its surface. Any part of the potato with an eye or bud can grow into a new plant.

Question 3

The leaves of cacti are modified into ____ to prevent water loss.

A. buds
B. tendril
C. spines
D. tuber

SOLUTION

Solution : 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 4

Karan observed hairy structures on the surface of carrots after it was dug out of soil. Which part do you think carrot is?

A.

Root

B.

Stem

C.

Leaf

D.

Fruit

SOLUTION

Solution : A

In some plants, roots are modified so as to help them store food. Such roots are called modified roots. Carrot is a modified root.

Question 5

A bushy plant with wooden stem and many branches is a ____.

A.

climber

B.

tree

C.

herb

D.

shrub

SOLUTION

Solution : D

Shrubs usually have woody stems above the ground. They can be clearly distinguished from herbs and trees because of their woody stems and their size. They are bushy in nature and are relatively shorter in height than a tree.

Question 6

Organisms that make their own food are called ___.

A.

autotrophs

B.

heterotrophs

C.

parasites 

D.

saprophytes 

SOLUTION

Solution : A

The organisms which prepare their own food are called autotrophs. Green plants are examples of autotrophs. 

Question 7

Rice is a ___.

A.

Fibre Crop

B.

Food crop

C.

Cash Crop

D.

Synthetic Crop

SOLUTION

Solution : B

Rice is a type of food crop. Food crops are cultivated for consumption.

Question 8

The plants in the image given below, store water in their stems in order to  _____________.

A. survive in dry conditions
B. keep insects away
C. keep humans away
D. survive in cold conditions

SOLUTION

Solution : A

The image given is of a cactus plant.
Cactus is a desert plant that has spines (modified leaves). These help them reduce water loss. They also have a thick fleshy stem to store water. These modifications help them to survive in the dry conditions.

Question 9

Which of the following trees do not shed leaves in winter?

A.

Oak

B.

Teak

C.

Maple

D.

Walnut

SOLUTION

Solution : B

Teak does not shed its leaves in winter. It grows in hilly areas and are evergreen in nature. 

Question 10

Which of the following is not a function of the root system in a plant?

A.

Holding the plant upright

B.

Absorbing sunlight

C.

Absorbing water

D.

Absorbing minerals

SOLUTION

Solution : B

Sunlight is absorbed by the green leaves of the plant. Green leaves contain a pigment called chlorophyll that absorbs energy from sunlight.

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