NSO Level 2 Class 7 Science Paper 2015 − 16 Higher Questions and Answers Part 4

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Question 27:

Match column I with column II and select the correct option from the codes given.

Match Column I with Column II and Select the Correct Option from the Codes Given
Column IColumn I
AClimateIDay to day conditions of atmosphere at a place.
BCamouflageIiInstrument used to measure humidity.
CHygrometerIiiSeasonal movement of complete population of animal from one area to another.
DMigrationIvAverage weather conditions at a particular place over a long period of time.
EWeatherVProtects against predators and helps to catch prey.

(A) (a) – (iv) , (b) – (v) , (c) – (ii) , (d) – (iii) , (e) – (i)

(B) (a) – (ii) , (b) – (iii) , (c) – (iv) , (d) – (v) , (e) – (i)

(C) (a) – (i) , (b) – (ii) , (c) – (iii) , (d) – (iv) , (e) – (v)

(D) (a) – (iii) , (b) – (i) , (c) – (v) , (d) – (iv) , (e) – (ii)

Question 28:

The given box shows some adaptations shown by different animals. Which of the following options correctly classifies these adaptations in accordance to desert region and polar region?

(i) Long legs, tails, and very large ears.

(ii) Short legs, tails, and small ears.

(iii) Production of concentrated urine.

(iv) Presence of leathery lips.

Which of the Following Options Correctly Classifies These Adaptations in Accordance to Desert Region and Polar Region?
Desert regionPolar region
(A)(i)(ii) , (iii) , (iv)
(B)(i) , (iv)(ii) , (iii)
(C)(i) , (iii) , (iv)(ii)
(D)(ii) , (iii)(i) , (iv)

Question 29:

Preeti burnt a fibre X. She found that X is self- extinguishing and leaves a dull black bead which crushes easily to powder.

Which of the following could be fibre X?

(A) Wool

(B) Silk

(C) Nylon

(D) Both A and B

Question 30:

Which of the following statements is/are incorrect?

(i) The forest floor in a tropical forest is dark, so some plants grow high up on tree branches to get nearer to light.

(ii) The understory of a forest is a tangle of shrubs, young trees, palms etc. , that can grow in the shade of tall trees.

(iii) Body of polar bear is covered with two thick layers of fur but subcutaneous fat is absent.

(iv) Branches of fir trees allow snow to slip off before it becomes too heavy to break the branches.

(A) (i) and (ii)

(B) (ii) and (iii)

(C) (iii) and (iv)

(D) (iii) only

Question 31:

Which of the following statements is not true?

(A) Presence of a thick layer of fur helps the lion-tailed macaque to survive in extreme cold conditions of polar regions.

(B) Elephants have large and highly vascular ears which help them in thermoregulation.

(C) Red-eyed frogs easily escape from their predators by startling them with ghost images created due to their shockingly bright colours.

(D) Camels have long eyelashes which are useful for keeping blowing sand out of their eyes.

Question 32:

Select the incorrect statement regarding silk.

(A) Silk is a natural protein fibre.

(B) Silk has a high tensile strength.

(C) Silk becomes brittle with age and prolonged exposure to sunlight.

(D) Silk fabric was first developed in ancient Europe.

Question 33:

Read the given statements and select the correct option.

Statement 1: Decomposers act as natural recyclers and serve a very useful purpose of maintaining the balance of nutrients in the soil.

Statement 2: When an organism dies, decomposers break down the materials of its dead body into nutrient substances it was made up of and return them to the soil from which they originally came.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true but statement 2 is false.

(D) Both statements 1 and 2 are false.

Question 34:

Given below are four groups of plants where different plants have been categorised on the basis of their natural methods of vegetative propagation. Each group has one odd member. Identify the odd ones and select the correct option regarding these.

I. Dahlia, sweet potato, garlic, Tapioca

II. Begonia, Kalanchoe, Bryophyllum, Bougainvillea

III. Ginger, turmeric, banana, Tapioca

IV. Lawn grass, water hyacinth, Colocasia, strawberry

(A) In group I Dahlia is wrongly placed and should be included in group III.

(B) In group II Bougainvillea is correctly placed but Kalanchoe should be replaced with water lettuce.

(C) In group III Tapioca is wrongly placed and should be included in group I.

(D) In group IV Colocasia is correctly placed whereas strawberry should be replaced by potato.

Question 35:

Refer to the given food web. What will happen if all T organisms are removed from the given food web?

Food Web

(A) The population of R and S will increase.

(B) The population of Q will decrease.

(C) The population of R will increase but population of S will decrease.

(D) Both A and B

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