Forum

Ecosystem

Give an account of energy flow in an ecosystem.

08/11/2024

Biology

12th (Science)

Ecosystem

Define decomposition and describe the processes and products of decomposition.

08/11/2024

Biology

12th (Science)

Ecosystem

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

08/11/2024

Biology

12th (Science)

Ecosystem

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

08/11/2024

Biology

12th (Science)

Ecosystem

Describe the components of an ecosystem.

08/11/2024

Biology

12th (Science)

Ecosystem

Distinguish between
(a) Grazing food chain and detritus food chain
(b) Production and decomposition
(c) Upright and inverted pyramid
(d) Food chain and Food web
(e) Litter and detritus
(f) Primary and secondary productivity

08/11/2024

Biology

12th (Science)

Ecosystem

What is the percentage of photosynthetically active radiation (PAR) in
the incident solar radiation?
(a) 100%
(b) 50 %
(c) 1-5%
(d) 2-10%

08/11/2024

Biology

12th (Science)

Ecosystem

Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above

08/11/2024

Biology

12th (Science)

Ecosystem

The second trophic level in a lake is
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes

08/11/2024

Biology

12th (Science)

Ecosystem

Which one of the following has the largest population in a food chain?
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers

08/11/2024

Biology

12th (Science)