NSO Level 1- Science Olympiad (SOF) Class 9: Questions 164 - 168 of 1128

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Question 164

Question

Match List-Ⅰ List-Ⅱ▾

Match the following.

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Photosynthesis

(i)

Carbon dioxide cycle

(B)

Greenhouse effect

(ii)

Conversion of nitrates into nitrogen

(C)

Denitrification

(iii)

Global warming

(D)

Decomposition

(iv)

Conversion of macromolecules into micromolecules

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (i)
  • (iii)
  • (iv)
  • (ii)

b.

  • (i)
  • (iii)
  • (ii)
  • (iv)

c.

  • (i)
  • (iv)
  • (iii)
  • (ii)

d.

  • (ii)
  • (i)
  • (iii)
  • (iv)

Question 165

Question

MCQ▾

Afforestation means

Choices

Choice (4)Response

a.

Extensive plantation of trees

b.

Soil erosion

c.

Changes in water pollution

d.

Removal of trees

Question 166

Question

MCQ▾

Which of the following is an example of bacterial plant pathogen?

Choices

Choice (4)Response

a.

Azospirillum

b.

Azotobacter

c.

Agrobacterium

d.

Rhizobium

Question 167

Question

MCQ▾

Find the correct sequence of herbarium preparation.

Choices

Choice (4)Response

a.

Collection – drying – poisoning - mounting

b.

Collection – mounting – poisoning - pressing

c.

Mounting – collection – drying - pressing

d.

Mounting- drying – pressing - collection

Question 168

Question

MCQ▾

Soil erosion can be prevented by

Choices

Choice (4)Response

a.

Stopping or controlling ranching and grazing by animals

b.

Terracing

c.

Reforestation

d.

All a., b. and c. are correct

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