CBSE 10th Standard Science Subject Our Environment HOT Questions 2 Mark Questions With Solution 2021
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CBSE 10th Standard Science Subject Our Environment HOT Questions 2 Mark Questions With Solution 2021
10th Standard CBSE
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Reg.No. :
Science
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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?
(a) -
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.
(a) -
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) -
In the food chain given below:
Grass\(\longrightarrow\)Grasshopper\(\longrightarrow\)Frog\(\longrightarrow\)Snake\(\longrightarrow\)Peacock
What will happen if all the frogs are removed?(a) -
A non-biodegradable toxic chemical has entered into the food chain. Which type of food habit will you suggest, vegetarian or non-vegetarian? Why?
(a)
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CBSE 10th Standard Science Subject Our Environment HOT Questions 2 Mark Questions With Solution 2021 Answer Keys
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Snakes will have maximum concentration of harmful chemicals in its body.
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(a) Peacock
(b) Biological magnification.
(c) Grasshopper\(\longrightarrow\)Frog\(\longrightarrow\)Snake\(\longrightarrow\)Peacock -
'X' will be more stable.
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(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. -
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.
