EASY
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A crow is a decomposer.

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Important Questions on Organisms and Populations

HARD
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
With the help of the diagram, explain the flow of energy in an ecosystem.
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Explain the process of the flow of energy in different trophic level of an ecosystem.
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Explain the flow of energy in an ecosystem with the help of a diagram.
HARD
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
By which way the flow of energy and nutrients takes place in an ecosystem.
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
How is the detritus food chain connected with the grazing food chain in a natural ecosystem?
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions

Select the correct option for the "P" and "Q" in the given chart of a biological magnification of pesticides.

Question Image

EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions

Write the differences between 

Food chain and food web

MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Draw the sequence of organisms of a food chain of a pond ecosystem.
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Explain the role of the ‘first trophic level’ in an ecosystem.
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Describe the DDT biomagnification occurring in an aquatic food chain. State the negative effects the process has on the organisms at the last trophic level of the food chain.
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Name the type of food chain that is the major conduit for energy flow in an aquatic ecosystem.
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions

Match the trophic levels with their correct species examples in grassland ecosystem.

(a) Fourth trophic level (i) Crow
(b) Second trophic level (ii) Vulture
(c) First trophic level (iii) Rabbit
(d) Third trophic level (iv) Grass

Select the correct option.

EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions

Write down the names of trophic levels in the following food chain: 

Grass →Goat → Man

EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
In a food chain, deers are
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Differentiate between producer and decomposer.
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Give a diagrammatic representation of energy flow through different trophic levels.
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
State and Explain ten percent law of energy.
MEDIUM
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
What do detritus food chains begin with?
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
Identify the possible link 'M' in the following food chain:
Plant → Insect →M→ Snake → Eagle
EASY
Biology>Ecology and Environment>Organisms and Populations>Population Interactions
If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant → mice → snake → peacock