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12th Biology Weekly Test - 2 (Botany - Environmental Issues )

St. Britto Hr. Sec. School - Madurai

12th Biology Weekly Test - 2 (Botany - Environmental Issues )-Aug 2020

Time : 1.30 Hours

Part - A

Multiple Choice Question - Answer All Question

The unit for measuring ozone thickness

Joule
Kilos
Dobson
Watt

Tree cultivation in private lands was implemented in the state from

2007-08 to 2011
2004-05 to 2010
2002-03 to 2011
2008-09 to 2012

One of the chief reasons among the following for the depletion in the number of species making endangered is

over hunting and poaching
green house effect
competition and predation
Habitat destruction

One of the chief reasons among the following for the depletion in the number of species making endangered is

over hunting and poaching
green house effect
competition and predation
habitat destruction

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

N₂0 and C0₂
CFCs and N₂0
CH₄ and C0₂
CH₄ and CFCS

_____________ has single - handedly planted a forest in the middle of a barren wasteland.

Jawaharlal Nehru
Jadav "Molai'' Payeng
Sundarlal Bahuguna
Panduranga Hegde

Find the wrongly matched pair.

Endemism - Species confined to a region and not found anywhere else.
Hotspots - Western ghats
Ex-situ Conservation - Zoological parks
Sacred groves - Saintri hills of Rajasthan
Alien sp. Of India - Water hyacinth

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

Ammonia
Methane
Nitrous oxide
Ozone

The plants which are grown in silivpasture system are

Sesbania and Acacia
Solenum and Crotalaria
Clitoria and Begonia
Teak and sandal

Deforestation means

growing plants and trees in an area where there is no forest
growing plants and trees in an area where the forest is removed
growing plants and trees in a pond
removal of plants and trees

___________ is an integration of trees, crops and livestock on the same plot of land.

Social forestry
Jhum
Taungya system
Agroforestry

_________ is a indicator for Nitrate.

Robinia
Petunia
Lichens
Gladiolus

Which of the following is normally not an atmospheric pollutant

CO
SO₂
CO₂
Hydrocarbons

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

N₂O and CO₂
CFC_s and N₂O
CH₄and CO₂
CH₄ and CFCS

Deforestation means

growing plants and trees in an area where there is no forest
growing plants and trees in an area where the forest is removed
growing plants and trees in a pond
Removal of plants and trees

Part - B

Generic 5 - Answer All Question

Write the main objectives of Afforestation.
List the effects of global warming on plants.
Mention strategies to deal with the issue.

Write the effects of ozone depletion.

Write the effects of deforestation.

Suggest a solution to water crisis and explain its advantages.

Write a note on carbon foot print.

What are the effects of deforestation and benefits of agroforesty?

Explain afforestation with case studies.

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