Ecosystem - Rajasthan Board (RBSE) STD 12 Science BIOLOGY Questions

Q 1M.C.Q (0.5 Marks)1 Mark

The natural interconnection of food chain is called:

✓
Food web
B
Standing crop
C
Trophic level
D
Productivity

Answer: A.

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Q 2M.C.Q (0.5 Marks)1 Mark

An example of man-made ecosystem is:

A
Desert
B
Rivers
C
Estuary
✓
Aquarium

Answer: D.

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Q 3M.C.Q (0.5 Marks)1 Mark

The trophic level of green plants in food chain is:

✓
Producers
B
Primary consumers
C
Secondary consumers
D
Decomposers

Answer: A.

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Q 4M.C.Q (0.5 Marks)1 Mark

What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?

A
$100 \%$
✓
$50 \%$
C
$1-5 \%$
D
$2-10 \%$

Answer: B.

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Q 5M.C.Q (0.5 Marks)1 Mark

Secondary producers are:

✓
Herbivores
B
Producers
C
Carnivores
D
None of the above

Answer: A.

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Q 6Fill in blanks.1 Mark

The major reservoir of carbon on earth is _________.

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Q 7Fill in blanks.1 Mark

Common detritivores in our ecosystem are _________.

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Q 8Fill in blanks.1 Mark

In aquatic ecosystems, the productivity is the limiting factor for the productivity is _________.

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Q 9Fill in blanks.1 Mark

In an ecosystem dominated by trees, the pyramid (of numbers) is_________ type.

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Q 10Fill in blanks.1 Mark

Plants are called as _________ because they fix carbon dioxide.

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Q 111 Marks Question1 Mark

What type of pyramid of biomass are there in the ocean?

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Q 121 Marks Question1 Mark

Which terristrial biome is the most advanced form the point of view of vegetative development and biological community?

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Q 131 Marks Question1 Mark

From which biotic component does the detritus food chain begin?

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Q 141 Marks Question1 Mark

Which is the most stable ecosystem?

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Q 151 Marks Question1 Mark

What do you mean by secondary productivity?

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Q 161.5 Marks Questions2 Marks

The pyramid of energy is always upright. Why?

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Q 171.5 Marks Questions2 Marks

Distinguish between :
Litter and detritus

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Q 181.5 Marks Questions2 Marks

Explain the cropland ecosystem.

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Q 193 Marks Question3 Marks

What is primary productivity? Give brief description of factors that affect primary productivity.

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Q 203 Marks Question3 Marks

Distinguish between :
Primary and secondary productivity

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Q 213 Marks Question3 Marks

Distinguish between :
Food chain and Food web

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Q 223 Marks Question3 Marks

Distinguish between :
Upright and inverted pyramid

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Q 233 Marks Question3 Marks

Distinguish between :
Production and decomposition

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Q 244 Marks Questions4 Marks

(i) Define standing crop.
(ii) Explain important steps in the process of decomposition in a terrestrial ecosystem.

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Q 254 Marks Questions4 Marks

(i) Define net primary productivity.
(ii) Explain with diagram that the pyramid of energy is always upright.

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Q 264 Marks Questions4 Marks

Define ecological pyramids and describe with examples, pyramids of number and biomass.

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Q 274 Marks Questions4 Marks

Describe the components of an ecosystem

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Q 284 Marks Questions4 Marks

Give an account of energy flow in an ecosystem.

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Ecosystem question types

Ecosystem questions

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Ecosystem BIOLOGY - Ecosystem

Ecosystem question types

Ecosystem questions

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