Fill in the blanks.
A. Plants are called as ____________ because they fix carbon dioxide.
In an ecosystem dominated by trees, the pyramid (of numbers)
Is _____ type.
In aquatic ecosystems, the limiting factor for the productivity is_______.
Common detritivores in our ecosystem are_________.
The major reservoir of carbon on earth is_________.
Which one of the following has the largest population in a food chain?
A. Producers
B. Primary consumers
C. Secondary consumers
D. Decomposers
The second trophic level in a lake is
A. Phytoplankton
B. Zooplankton
C. Benthos
D. Fishes
Secondary producers are
A. Herbivores
B. Producers
C. Carnivores
D. None of the above
What is the percentage of photosynthetically active radiation (PAR) in the incident solar radiation?
A. 100%
B. 50 %
C. 1-5%
D. 2-10%
Distinguish between
Grazing food chain and detritus food chain
Production and decomposition
Upright and inverted pyramid
Food chain and Food web
Litter and detritus
Primary and secondary productivity
Describe the components of an ecosystem.
Define ecological pyramids and describe with examples, pyramids of number and biomass.
What is primary productivity? Give brief description of factors that affect primary productivity.
Define decomposition and describe the processes and products of decomposition.
Give an account of energy flow in an ecosystem.
Write important features of a sedimentary cycle in an ecosystem.
Outline salient features of carbon cycling in an ecosystem.
