Natural Resources MCQ Questions for Class 9 Science Chapter 14 with Answers

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All questions answers in the last paragraph

MCQ Questions for Class 9 Science with Answers Biology

Q1. Oxygen is harmful for

(A) ferns
(B) nitrogen fixing bacteria
(C) chara
(D) mango tree

Q2. Which of the following bacteria is responsible for nitrogen fixation?

(A) Pseudomonas
(B) Nitrosomonas
(C) Rhizobium
(D) None of these

Q3. Wrinkling in old age is due to

(A) collagen
(B) myosin
(C) keratin
(D) actin

Q4. When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of nitrogen?

(A) It moves along with oxygen into the cells
(B) It comes out with the carbon dioxide during exhalation
(C)It is absorbed only by the nasal cells
(D) Nitrogen concentration is already more in the cells, so itis not at all absorbed

Q5. Biotic component of the biosphere is not constituted by

(A) producers
(B) consumers
(C) decomposer
(D) air

Q6. If there were no atmosphere around the Earth, the temperature of the Earth will

(A) increase
(B) go on decreasing
(C) increase during day and decrease during night
(D) be unaffected

Q7. Volkmann’s canals occur in :-

(A) Cartilage
(B) Bone
(C) Internal ear
(D) Liver

Q8. Out of the total land area, how many million hectares of land suffer from degradation?

(A) 150
(B) 175
(C) 200
(D) 225

Q9. Major source of mineral in soil is the

(A) parent rock from which soil is formed
(B) plants
(C) animals
(D) bacteria

Q10. One of the following factors does not lead to soil formation in nature.

(A) The sun
(B) Water
(C) Wind
(D) Polythene bags

Q11. In nutrient cycle, minerals tend to be dispersed through

(A) evaporation
(B) assimilation
(C) surface and sub-surface run off
(D) convection

Q12. You must have observed that during the winters sometimesit becomes quite difficult to see even the objects short distance apart. This low visibility during the cold weather is due to:

(A) Formation of fossil fuels
(B) Unburnt carbon particles of hydrocarbons suspended in air
(C) Lack of adequate power supply
(D) None of these

Q13. Which of the following is a recently originated problem of environment?

(A) Ozone layer depletion
(B) Greenhouse effect
(C) Global warming
(D) All of the above

Q14. What would happen, if all the oxygen present in the environment is converted to ozone?

(A) We will be protected more
(B) It will become poisonous and kill living forms
(C) Ozone is not stable, hence it will be toxic
(D) It will help harmful Sun radiations to reach Earth and damage many life forms.

Q15. The main function of the Rhizobium bacteria is:

(A) To convert free nitrogen into nitrates
(B) To convert the nitrates into nitrogen
(C) Decomposition of ammonium salts
(D) Denitrification

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All questions answers

QUESTIONS NO :	ANSWERS :
1	B
2	C
3	A
4	B
5	D
6	C
7	B
8	B
9	A
10	D
11	C
12	B
13	D
14	B
15	A