MEDIUM
10th CBSE
IMPORTANT
Earn 100

What is biological magnification? If the concentration of DDT were 0.2 ppm in water of a lake, what would be its likely concentration in fish in the following food chain?
Plankton → Fish → Fish eating birds.

Important Questions on Our Environment

MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 12
Write the food chain operation in a freshwater pond. Mention the food habit of each trophic level in this food chain.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 13
Construct an aquatic food chain showing four trophic levels.
MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 14
Explain 'biological magnification' with the help of an example.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 15
What is meant by non-biodegradable waste material? Give its two examples.
MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 16
Why is improper disposal of waste a curse to environment?
MEDIUM
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 17
What are the advantages of cloth bags over plastic bags during shopping?
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 18
Describe any four modes of disposal of waste.
EASY
10th CBSE
IMPORTANT
CORE SCIENCE BIOLOGY For Class 10>Chapter 5 - Our Environment>EXERCISE - 5A>Q 19
An environmentalist on visit to your school suggested the use of three R's to save the environment. Explain what he meant by three R's and how you would follow his advice at home?