EASY
Earn 100

List the symptoms of arsenic poisoning.

Important Questions on Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
An environmentalist on a visit to your school suggested various methods to save the environment.
a) What does the term ‘Reduce’ refer to?
b) List any two advantages of water harvesting.
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
To save the environment you have come across the words ''Reuse'' and ''Recycle''. What do they refer to?
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Use of solar energy operated devices instead of LPG for preparation of food is an example of:
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
The following very short answer type question of 2 marks may be answered in a few words or few sentences or as may be required:
Why is better to 'Re-use' the things?
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
The presence of which microorganism in Ganga water indicates contamination?
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Which radiation coming from the sun, is prevented by the Ozone layer from falling on the earth’s surface?
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
One student makes a kaleidoscope using pieces of coloured glass. Which 'R' he has used to protect the environment? 
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
The three R’s to save the environment are
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
The presence of following kind of bacteria in water indicates contamination by disease causing micro-organisms
HARD
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
What is the importance of reduce, recycle and reuse to save the environment? What changes can you make in your habits to become more environment-friendly?
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.

What do you mean by the three R's to save the environment? Write in brief.

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Name the group of bacteria, found in human intestines, whose presence in water indicates contamination by diseases causing microorganisms?
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Everyone of us can do something to reduce our consumption of various natural resources. List any two such activities based on the 3-R approach. 
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Explain with three points how recycling waste materials help in maintaining ecological balance.
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
 “A lot of indiscriminate activities of humans pollute the environment”- Support the statement by giving three examples in favour of it. Give examples of a national park and a biosphere reserve in West Bengal.
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.

How will you reuse the waste water in your houses?

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Mention any three adverse effects of fishing with chemicals.
MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.

Give the biological reasons for the following statement:

Water pollution is a major cause of concern in our country.

MEDIUM
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
The amount of wastewater produced globally remains untreated causing widespread water pollution:(Give in percentage without symbol)
EASY
Life Sciences>Ecosystems: Interactions, Energy, and Dynamics>Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.>Ecosystem Dynamics, Functioning, and Resilience - Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can lead to shifts in all its populations.
How do industries cause water pollution?