Revision Series | Science | General Science | 59

December 22, 2023

Which of the following are examples of a symbiotic relationship?
1. Algae and fungus
2.Algae and bacteria
3. Fungus and bacteria
4. Plants and bacteria
Use the code given below to select the correct answer —

(A) 1 and 3 only
(B) 1, 2 and 3 only
(C) 1 and 4 only
(D) 2, 3 and 4 only

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Answer- C

Which of the following statement marks as a difference between plant cell and animal cell?

(A) Plant cells have cell wall which animal cells do not.
(B) Plant cells do not have vacuole while animal cells do have.
(C) Plant cells have only cell membrane while animal cells have both cell wall as well as cell membrane.
(D) Plant cells have more plastids while animal cells have few plastids.

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Answer- A

Which of the followings is/are called 'Food Factories of Plants'?
1. Leaf
2. Stem
3. Root
4. Branch
Use the code given below to select the correct answer:

(A) 1 only
(B) 2 only
(C) 1 and 4 only
(D) 3 and 4 only

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Answer- A

Consider the following assertions :
1. The heat flows from a hotter object to a colder object.
2. The mode of heat transfer that continues till the whole water gets heated is known as convection.
3. The process by which heat is transferred from the hotter end to the colder end of an object is known as the conduction.
Which of the above assertions is/are correct?

(A) 1 only
(B) 2 only
(C) 2 and 3 only
(D) 1, 2 and 3

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Answer- D

Which of the following examples is/are related to physical change?
1. Tearing of paper
2. Change in color
3.Combining of Hydrogen and Oxygen to form water
4.Burning of paper
Use the code given below to select the correct answer :

(A) 1 only
(B) 1 and 2 only
(C) 2 and 3 only
(D) 1, 2, 3 and 4

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Answer- A

Cell is the structural and functional unit of life. The word cell is derived from the Latin word ‘cellula’ which means “a little room”. Can you name the scientist who coined the term cell

(A) Robert Hooke
(B) Anton Von Leeuwenhoek
(C) RobertBrown
(D) Ernst Haeckel

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Answer- A

Barometer measures:

(A) Pressure
(B) Atmospheric pressure
(C) Wind velocity
(D) Gaseous pressure.

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Answer- B

Consider the following gases:
1. Carbon Dioxide
2. Nitrous Oxide
3. Methane
4. Water vapour
Which of the above is/are greenhouse gas/gases?

(A) 1 and 2 only
(B) 1, 2 and 3 only
(C) 2, 3 and 4 only
(D) 1, 2, 3 and 4

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Answer- D

Brass is a:

(A) Compound
(B) Element
(C) Homogeneous mixture
(D) Heterogeneous mixture

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Answer- C

At what temperature water has highest density?

(A) 0∘C
(B) 4∘C
(C) 10∘C
(D) 20∘C

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Answer- B