Increased amount of ___________ in the atmosphere, results in greenhouse effect and global warming

(a)

carbon monoxide

(b)

sulphur dioxide

(c)

nitrogen dioxide

(d)

carbon dioxide

In some xerophytes, leaves are modified into spines as an adaptation ________________.

(a)

to reduce transpiration rate

(b)

to store water

(c)

to reduce consumption of water

(d)

all of the above

Which of the following is one of the strategies to conserve water?

(a)

Water recycling

(b)

Increasing the number of bore wells

(c)

Using large overhead water tanks

(d)

Watering the plants using hose

How much percentage of Nitrogen consist in Earth's atmosphere?

(a)

25%

(b)

12%

(c)

92%

(d)

78%

Deforestation generally decrease ______________.

(a)

Rainfall

(b)

Global warming

(c)

Soil erosion

(d)

Drought

World water day is celebrated every year on ____________.

(a)

August 12

(b)

22^nd March

(c)

June 5

(d)

July 10

Biotic components include _______________.

(a)

All living organism

(b)

Light, temperature etc.

(c)

Water, mineral and gases

(d)

Self nourishing green plants

Which part of plant consisting Nitrogen fixing bacteria?

(a)

Roots

(b)

Stems

(c)

Leaves

(d)

All the above

The amount of CO₂ present in the atmospheric air is _______________.

(a)

0.318%

(b)

0.383%

(c)

21%

(d)

78%

Which cycie involves transpiration?

(a)

Water cycle

(b)

Nitrogen cycle

(c)

Carbon cycle

(d)

All the above