In which category does the human beings fall in an ecosystem?
- AHerbivores
- BCarnivores
- CDecomposers
- ✓Omnivores
Answer: D.
View full solution →Question types
PART - 2 CH - 13 Our Environment question types
158 questions across 8 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
158
Questions
8
Question groups
5
Question types
01
M.C.Q
38 Q→02Fill in the blank
12 Q→03True-False
15 Q→04[1 Mark Questions]
52 Q→05[2 Mark Questions]
30 Q→06[3 Mark Questions]
1 Q→07[4 marks Questions]
2 Q→08MATCH THE FOLLOWING.
8 Q→Sample Questions
PART - 2 CH - 13 Our Environment questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
By whom the number of organisms are limited at trophic level of food chain?
- ✓Less availability of energy at higher tropic level
- BSufficient food supply
- CPolluted air
- DWater
Answer: A.
View full solution →Which of the following groups have only non-biodegradable components?
1. wood, paper, leather
2. polythene, detergent, PVC
3. plastic, detergent, glass
4. plastic, grass, animal dung
1. wood, paper, leather
2. polythene, detergent, PVC
3. plastic, detergent, glass
4. plastic, grass, animal dung
- A3
- B4
- C1 and 3
- ✓2 and 3
Answer: D.
View full solution →Which organism is more affected by biological magnification problem arising due to entry of DDT in pond ecosystem?
- ✓Man
- BBirds habitat near the pond
- CFishes in pond
- DAquatic plants in pond
Answer: A.
View full solution →Which is the correct statement regarding food chain?
- AAll consumers are not producers.
- BMore energy is available at lower trophic levels.
- COne organism may be involved in more than one food chain.
- ✓All of the given
Answer: D.
View full solution →_________ is flow in form of food in an ecosystem. (Energy, Matter, Nutrients)
UV radiation can cause _________ cancer in human beings. (Skin, Lung, Brain)
A problem of _________ is due to entry of non-biodegradable substance. (Biological magnification, Eutrophication, Acid rain)
Main energy source in an ecosystem is _________. (Sun, Wind, Water)
Solar energy is transformed into _________ by chlorophyllous organisms. (Chemical energy, Light energy, Heat energy)
Decomposers are natural scavengers.
Food web is formed due to alternative path for food availability.
All organisms can use only chemical energy.
In food chain energy flow is bidirectional.
Water is abiotic factor in pond ecosystem.
In which unit is amount of atmospheric ozone expressed?
Smallest energy transfer secondary consumers to tertiary consumers ::
largest energy transfer : __________
largest energy transfer : __________
A food chain comprising hawk, snake, paddy and mice. If 15,000 J of energy available to mice then how much energy will be in paddy and how much energy will be available to hawk..
Among the following, which have posed a threat to the environment?
Body spray, bacteria, aerosols, CFCs, wild grass
Body spray, bacteria, aerosols, CFCs, wild grass
When a population of animal 'X' is Introduced into the biotic community of an ecosystem, the number of lions increased while the number of deer decreased. Which is correct option for animal 'X' ?
Classify the following ecosystems into natural ecosystem and artificial ecosystems.
Forest, garden, aquarium, Sea
Forest, garden, aquarium, Sea
How can you help in reducing the problem of waste disposal? Give any two methods. ### What will be your role in 'Swatchh Bharat Abhiyan' to reduce the problem of waste disposal?
In the chart of energy flow given below identify the decomposers and explain your choice :
Why are autotrophs called producers and heterotrophs called consumers?
Distinguish between :
Producer organisms and Consumer organisms
Producer organisms and Consumer organisms
Distinguish between :
Biodegradable wastes and Non-biodegradable wastes
Biodegradable wastes and Non-biodegradable wastes
| A | B |
| Q.1. The organisms which prepared their own Food | a) Herbivores |
| Q.2. The organisms which feed on plants | b) Producers |
| c) Carnivores |
| Column I | Column II |
| Q.1. Animals feed only on plants | p. Carnivores |
| Q.2. Animals feed on other animals | q. Decomposers |
| r. Herbivores |
| Column I | Column II |
| Q.1. Animals feed on plants as well as animals | p. Carnivores |
| Q.2. Organisms obtain nutrition from decaying organic matter | q. Omnivores |
| r. Decomposers |
| Column I | Column II | Column III |
| Q.1. Omnivores | a. Transformer of solar energy | p. Tiger |
| Q.2. Producer | b. Secondary consumer | q. Crow |
| c. Biconsumer | r. Grass |
| Column I | Column II | Column III |
| Q.1. Detritus feeding | a. Secondary consumer | p. Tiger |
| Q.2. Carnivores | b. Primary consumer | q. Crow |
| c. Scavenger | r. Fox |
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