1. If a grasshopper is eaten by a frog, then the energy transfer will be from ?

secondary consumer to primary consumer

primary consumer to secondary consumer

producer to primary consumer

producer to decomposer

Answer: primary consumer to secondary consumer

Explanation:


2. Which group of organisms are not constituents of a food chain ?

Wolf, grass, snake, tiger

Frog, snake, eagle, grass, grasshopper

Plankton, man, fish, grasshopper

Grass, lion, rabbit

Answer: Wolf, grass, snake, tiger

Explanation:


3. Which one of the following is a non-biodegradable substance ?

Cotton cloth

Paper

DDT

Manure

Answer: DDT

Explanation:


4. An ecosystem includes ?

non-living objects

both living organisms and non-living objects

all living organisms

sometimes living organisms and sometimes non-living objects

Answer: both living organisms and non-living objects

Explanation:


5. In a food chain, the third trophic level is always occupied by ?

producer

decomposer

herbivore

carnivore

Answer: carnivore

Explanation:


6. Food web is ?

Display of different food items

Interlinked food chains

Using food items for a fashion dress

Food served through websites

Answer: Interlinked food chains

Explanation:


7. Only ____ % of the energy can be transferred from one trophic level to the next trophic level. ?

20

1

10

5

Answer: 10

Explanation:


8. Replacing Plastic cups by paper cups for selling tea on train may be preferred because ?

Plastic cups are bio degradable

Paper cups are cheaper

Paper cups are bio degradable

Paper cups are non bio degradable

Answer: Paper cups are bio degradable

Explanation:


9. Identify the proper food chain ?

Grass , frog , snake , insect

Insect , frog , grass , snake

Grass, insect , frog , snake

Grass , frog , insect , snake

Answer: Grass, insect , frog , snake

Explanation:


10. Excessive exposure of humans to UV-ray s results in (i) damage to immune system (ii) damage to lungs (iii) skin cancer (iv) peptic ulcer ?

(iii) and (iv)

(i) and (iii)

(ii) and (iv)

(i) and (ii)

Answer: (i) and (iii)

Explanation: