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Our Environment

Why are crop fields known as artificial ecosystems?

Our Environment

What are the advantages of cloth bags over plastic bags during shopping?

Our Environment

Write the common food chain of a pond ecosystem.

Our Environment

Why is improper disposal of waste a curse to environment?

Our Environment

Disposable plastic plates should not be used because
(a) they are made of materials with light weight
(b) they are made of toxic materials
(c) they are made of biodegradable materials
(d) they are made of non-biodegradable materials

Our Environment

If a grass hopper is eaten by a frog, then the energy transfer will be from
(a) producer to decomposer
(b) producer to primary consumer
(c) primary consumer to secondary consumer
(d) secondary consumer to primary consumer

Our Environment

The decomposers in an ecosystem
(a) convert inorganic material, to simpler forms
(b) convert organic material to inorganic forms
(c) convert inorganic materials into organic compounds
(d) do not breakdown organic compounds

Our Environment

What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
(a) The population of tiger increases
(b) The population of grass decreases
(c) Tiger will start eating grass
(d) The population of tiger decreases and the population of grass increases

Our Environment

In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?

(a) T₄

(b) T₂

(c) T₁

(d) T₃

Our Environment

The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about
(a) 1 %
(b) 5 %
(c) 8 %
(d) 10 %