Class X Science
Subject: Biology___Objective Question
Chapter 5: Our Environment
Q. 1. Only ____ % of the energy can be transferred from one trophic level to the next trophic level.(A) 1
(B) 5
(C) 10
(D) 20
Right Ans:- (10
Q. 2. Accumulation of non- biodegradable pesticides in different trophic levels is called
(A) Biological degradation
(B) Biological magnification
(C) Biological concentration
(D) Biological deposition
Right Ans:- Biological magnification
Q. 3. The UV radiation from the sun is likely to cause _______in human
(A) Skin cancer
(B) Lung cancer
(C) Liver Cancer
(D) Brain Cancer
Right Ans:- Skin cancer
Q. 4. Replacing Plastic cups by paper cups for selling tea on train may be preferred because
(A) Paper cups are bio degradable
(B) Paper cups are cheaper
(C) Paper cups are stronger
(D) Paper cups keep things safe
Right Ans:- Paper cups are bio degradable
Q. 5. World Environment day is celebrated on
(A) July 1
(B) July 5
(C) June 1
(D) June 5
Right Ans:- June 5
Q. 6. Which one of the following is a non- biodegradable substance
(A) DDT
(B) Manure
(C) paper
(D) Cotton cloth
Right Ans:- DDT
Q. 7. In a terrestrial ecosystem the biomass of _______should be the most
(A) Herbivore
(B) Carnivore
(C) Producer
(D) Any one of the above
Right Ans:- Producer
Q. 8. Identify the proper food chain
(A) Grass ----- frog ---- insect ----- snake
(B) Grass---- insect ----- frog ------ snake
(C) Insect --- frog ---- grass ---- snake
(D) Grass --- frog ---- snake ----- insect
Right Ans:- Grass---- insect ----- frog ------ snake
Q. 9. Food web is
(A) Food served through websites
(B) Display of different food items
(C) Interlinked food chains
(D) Using food items for a fashion dress
Right Ans:- Interlinked food chains
Q. 10. The best way to dispose waste is by
(A) Making a paste of all domestic waste and putting them in a river
(B) Separating biodegradable and nonbiodegradable waste before disposing in bins
(C) Throw the waste on road side
(D) Dumping all domestic waste in litter bin
Right Ans:- Separating biodegradable and nonbiodegradable waste before disposing in bins
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