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NCERT Textbook
BIOLOGY ECOSYSTEM

Class 12
Botany :-NCERT Solutions - Ecosystem.

Question 2
Which one of the following has the largest population in a food chain?
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers


Answer

Question 3
The second trophic level in a lake is-
(a) Phytoplankton
(b) Zooplankton
(c) Benthos
(d) Fishes


Answer

Question 4
Secondary producers are
(a) Herbivores
(b) Producers
(c) Carnivores
(d) None of the above


Answer

Question 6
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


Answer

Question 9

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

Answer

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