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CBSE 10th Standard Science Subject Our Environment HOT Questions 2 Mark Questions With Solution 2021

Published on: 29/05/2021

QB365 Provides the HOT Question Papers for Class 10 Science, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams

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Std: 10th Standard CBSE - Science

chapter: - HOT Questions

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Questions:

Generic 2

5 x 2 = 10

A non-biodegradable toxic chemical has entered into the food chain. Which type of food habit will you suggest, vegetarian or non-vegetarian? Why?

In the food chain given below:
Grass\(\longrightarrow\)Grasshopper\(\longrightarrow\)Frog\(\longrightarrow\)Snake\(\longrightarrow\)Peacock
What will happen if all the frogs are removed?

In comparing two ecosystems 'X' and 'Y', i is observed that 'X' has only first and second order consumers, while 'Y' has third, fourth and fifth order consumers. Which of the two would be more stable?

A food chain consisting of Peacock, Frog, Snake, Grasshopper. Which organisms do you think will have high level of pesticides? What is the phenomenon called? Arrange the food chain.

If a harmful chemical enters a food chain consisting of snacks, grasshoppers, plants and frogs, which one of the organisms is likely to have a maximum concentration of harmful chemicals in its body?

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Answers Key:

Generic 2

5 x 2 = 10

Vegetarian. This is because the concentration of non-biodegradable chemical increases with the number of trophic level in a food chain. Thus, man will get high concentration of the chemical in the non-vegetarian food than in the vegetarian food.

(a) Increase in the population of grasshopper.
(b) Migration or death of snakes due to food scarcity.
(c) The ecological balance is distributed.
(d) Decrease in the production of grass.

'X' will be more stable.

(a) Peacock
(b) Biological magnification.
(c) Grasshopper\(\longrightarrow\)Frog\(\longrightarrow\)Snake\(\longrightarrow\)Peacock

Snakes will have maximum concentration of harmful chemicals in its body.