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Tulika pia
Tulika pia
@tulika-pia
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Joined: Nov 6, 2020
Last seen: Dec 24, 2020
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Topics: 2124 / Replies: 0
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Topic
“Damage to the ozone layer is a cause for concern.” Justify this statement. Suggest any two steps to limit this damage.
5 years ago
Forum
Our Environment
Replies: 0
Views: 123
Topic
Explain the phenomenon of “biological magnification” How does it affect organisms belonging to different trophic levels particularly the tertiary consumers?
5 years ago
Forum
Our Environment
Replies: 0
Views: 315
Topic
Describe how decomposers facilitate recycling of matter in order to maintain balance in the ecosystem.
5 years ago
Forum
Our Environment
Replies: 0
Views: 170
Topic
Explain ‘biological magnification’ with the help of an example.
5 years ago
Forum
Our Environment
Replies: 0
Views: 119
Topic
Construct an aquatic food chain showing four trophic levels.
5 years ago
Forum
Our Environment
Replies: 0
Views: 498
Topic
What are biodegradable and non- biodegradable substances? Select two biodegradable pollutants from the following: Agricultural waste, glass, plastic, sewage, DDT.
5 years ago
Forum
Our Environment
Replies: 0
Views: 217
Topic
State two problems caused by the non- biodegradable waste that we generate in our daily life.
5 years ago
Forum
Our Environment
Replies: 0
Views: 96
Topic
How is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of concern to us? State a cause of this damage.
5 years ago
Forum
Our Environment
Replies: 0
Views: 81
Topic
Which disease is caused in human beings due to depletion of ozone layer in the atmosphere?
5 years ago
Forum
Our Environment
Replies: 0
Views: 85
Topic
Why are green plants called ‘producers’?
5 years ago
Forum
Our Environment
Replies: 0
Views: 80
Topic
What are the two main components of our environment?
5 years ago
Forum
Our Environment
Replies: 0
Views: 87
Topic
Why are bacteria and fungi called decomposers? List any two advantages of decomposers to the environment.
5 years ago
Forum
Our Environment
Replies: 0
Views: 130
Topic
Name any two abiotic components of an environment.
5 years ago
Forum
Our Environment
Replies: 0
Views: 116
Topic
Why is ozone layer getting depleted at the higher levels of the atmosphere?
5 years ago
Forum
Our Environment
Replies: 0
Views: 159
Topic
How is the increase in demand for energy affecting our environment adversely?
5 years ago
Forum
Our Environment
Replies: 0
Views: 97
Topic
Choose the biodegradable pollutants from the list given below: Sewage, DDT, radioactive waste, agricultural waste.
5 years ago
Forum
Our Environment
Replies: 0
Views: 223
Topic
Distinguish between biodegradable and non-biodegradable pollutants.
5 years ago
Forum
Our Environment
Replies: 0
Views: 88
Topic
What is ‘environmental pollution’?
5 years ago
Forum
Our Environment
Replies: 0
Views: 96
Topic
In 1987 …….. succeeded in forging an agreement to freeze CFC production at 1986 levels. 2. Ozone at the higher levels of atmosphere is a product of UV radiation acting on …….. molecule. 3. …….. can be classified as herbivores, carnivores, omnivor...
5 years ago
Forum
Our Environment
Replies: 0
Views: 167
Topic
Those waste materials which can be broken down to non-poisonous substances in nature in due course of time by the action of micro-organisms are called …….. wastes. 2. The waste materials which can not be broken down into harmless substances in natu...
5 years ago
Forum
Our Environment
Replies: 0
Views: 157
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