All the factors of biosphere which affect the ability of organisms to survive and reproduce are called as _______________.

(a)

biological factors

(b)

abiotic factors

(c)

biotic factors

(d)

physical factors

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

Specific constituents such as nitrogen, phosphorus, suspended solids and heavy metals found in the wastewater are removed during ___________ treatment of water recycling process.

(a)

primary

(b)

tertiary

(c)

secondary

(d)

none of the above

Nitrogen is a greenhouse gas

(a) True

(b) False

Bats are the only mammals that can fly.

(a) True

(b) False

Aestivation is an adaptation to overcome cold condition.

(a) True

(b) False

Nitrogen fixation

(1)

Azotobacter

Ammonification

(2)

Pseudomonas species

Nitrification

(3)

Nitrosomonas

Denitrification

(4)

Putrefying bacteria

What are the two factors of biosphere?

What is adaptation?

What is grey water?

Describe the processes involved in the water cycle.

What is water recycling? Explain the conventional wastewater recycling treatment methods?