English Medium Class 10 - CBSE Question Bank Solutions for Science

What will happen if we kill all the organisms in one trophic level?

What is the difference between the food habits of organisms belonging to the first and the third trophic levels? Give one example each of the organisms belonging to these two trophic levels.

Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?

Write down a food chain in the sea.

Write down a food chain which ends with humans.

Write down a food chain with five links in it.

At which trophic level a person is feeding when he is eating roasted chicken.

At which trophic level a person is feeding when he is eating bread.

At which trophic level a person is feeding when he is eating eggs.

At which trophic level a person is feeding when he is eating apple.

At which trophic level a person is feeding when he is eating fish.

A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?

Construct a long food chain.

Construct a short foodchain, ending with man.

Write a common food chain of a pond ecosystem having four links.

Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place

Write one or two word for the following statement/definition :

Organisms which depend on the producers for food either directly or indirectly

What is a food chain?

Give one example of a simple food chain.