12th Bio Botany one marks - Lesson 8 - Online Test | Environmental Issues

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

Converting tropical forests into grazing land for cattle.

Ensuring that all excess paper packaging is buried to ashes

Redesigning landfill dumps to allow methane to be collected.

Promoting the use of private rather than public transport.

#2. 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.

Statement A is correct and Statement B is wrong.

Both Statements A and B are correct.

Statement A is correct and Statement B is wrong.

Both statements A and B are wrong.

#3. 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

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

Ammonia

Methane

Nitrous oxide

Ozone

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

N2O and CO2

CFCs and N2O

CH4 and CO2

CH4 and CFCS

#6. 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

#7. 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

#8. Deforestation does not lead to _______

Quick nutrient cycling

Soil erosion

alternation of local weather conditions

Destruction of natural habitat weather conditions

#9. The unit for measuring ozone thickness ______

Joule

Kilos

Dobson

) Watt

#10. People’s movement for the protection of environment in Sirsi of Karnataka is ________

Chipko movement

Amirtha Devi Bishwas movement

Appiko movement

None of the above

#11. The plants which are grown in silivpasture system are ________

Sesbania and Acacia

Solenum and Crotalaria

Clitoria and Begonia

Teak and sandal

#12. Methane is __________ times as effective as CO2 at trapping heat.

5

10

20

100

#13. Assertion (A): CO2 is a main cause for global warming Reason (R) : Greenhouse gases trap the radiant heat from sun

A is correct R is incorrect.

A is incorrect R is correct.

R explains A.

Both A and R are incorrect.

#14. Assertion (A): Ozone acts as a natural sun block. Reason (R): UV rays reaching the earth are deviated from earth.

A is correct R is incorrect.

A is incorrect R is correct.

R explains A.

Both A and R are incorrect.

#15. Identify the potent cause for deforestation.

Agriculture

Soil erosion

Afforestation

Forest fire

M	T	W	T	F	S	S
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

12th Bio Botany one marks – Lesson 8 – Online Test | Environmental Issues