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12th Standard Botany - Environmental Issues English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021

Published on: 05/11/2020

Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 12th Standard - Biology

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Questions:

Multiple Choice Question

10 x 1 = 10

____________ is the 100^th Satellite launched to watch border surveillance.

(a)

GSAT-6A

(b)

SCAT SAT-I

(c)

INSAT 3DR

(d)

CARTOSAT-2

Which is not a true statement regarding rainwater harvesting?

(a)

Mitigates groundwater quality

(b)

Reduces soil erosion

(c)

Decreases soil salinity

(d)

No wastage of land for storing

Pick out the odd one out _____________

(a)

Biosphere reserve

(b)

National parks

(c)

Wild life sanctuaries

(d)

Botanical gardens

Identify the potent cause for deforestation.

(a)

Agriculture

(b)

Soil erosion

(c)

Afforestation

(d)

Forest fire

Which is not a beneficial aspect of Agroforestry?

(a)

Nutrient cycling is improved

(b)

Balance in O₂ - CO₂ composition

(c)

Suitable for wetland where rainfall is maximum

(d)

Reduces water run-off problem

Which is not a greenhouse gas?

(a)

CO₂

(b)

N₂O

(c)

O₃

(d)

CFC

People’s movement for the protection of environment in Sirsi of Karnataka is ______.

(a)

Chipko movement

(b)

Amirtha Devi Bishwas movement

(c)

Appiko movement

(d)

None of the above

Deforestation does not lead to _____.

(a)

Quick nutrient cycling

(b)

soil erosion

(c)

alternation of local weather conditions

(d)

Destruction of natural habitat weather conditions

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

10.

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