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12th Standard English Medium Biology (Botany) Subject Environmental Issues Book Back 1 Mark Questions with Solution Part - I updated Book back Questions

Published on: 13/05/2022

QB365 provides detailed and simple solution for every book back questions in class 12 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.

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Questions:

Multiple Choice Question

5 x 1 = 5

One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as _____.

(a)

N₂O and CO₂

(b)

CFCs and N₂O

(c)

CH₄and CO₂

(d)

CH₄ and CFCS

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

(a)

Ammonia

(b)

Methane

(c)

Nitrous oxide

(d)

Ozone

Find the wrongly matched pair.

(a)

Endemism - Species confined to a region and not found anywhere else.

(b)

Hotspots - Western Ghats

(c)

Ex-situ Conservation - Zoological parks

(d)

Sacred groves - Saintri hills of Rajasthan

(e)

Alien sp. Of India - Water hyacinth

With respect to Eichhornia
Statement A: It drains off oxygen from water and is seen growing in standing water.
Statement B: It is an indigenous species of our country.

(a)

Statement A is correct and Statement B is wrong

(b)

Both Statements A and B are correct

(c)

Statement A is correct and Statement B is wrong.

(d)

Both statements A and B are wrong

Which of the following would most likely help to slow down the greenhouse effect.

(a)

Converting tropical forests into grazing land for cattle.

(b)