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Ecology

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What is an ecosystem?

  1. All organisms living in a given region.

  2. Only the producers living in a given region.

  3. The physical conditions of a given region.

  4. All organisms and the physical conditions of a given region.


Correct Option: D

Which of the following is an abiotic factor in any aquatic ecosystem?

  1. Oxygen

  2. Plants

  3. Fish

  4. Algae


Correct Option: A

Which of the following describes 'global ecosystem'?

  1. Lithosphere

  2. Biosphere

  3. Atmosphere

  4. Hydrosphere


Correct Option: B

What is a biome?

  1. A geographical region with a characteristic climate and biota.

  2. The climate of a region.

  3. The biotic components of a region.

  4. All of the abiotic and biotic factors of an ecosystem.


Correct Option: A

Which term describes the relationship between a species/population and its ecosystem in which it is living and breeding?

  1. Niche

  2. Ecosystem

  3. Habitat

  4. Trophic level


Correct Option: A

Which of the following is the correct order of components of any ecosystem?

  1. Consumers, producers, decomposers, abiotic environment

  2. Producers, abiotic environment, consumers, decomposers

  3. Producers, abiotic environment, decomposers, consumers

  4. Abiotic environment, producers, consumers, decomposers


Correct Option: D

Which of these factors is not a threat to our environment?

  1. Growing population

  2. Green house effect

  3. Migration

  4. Urbanization


Correct Option: C
Explanation:

   

Which of the following statements is incorrect for environment?

  1. It includes only physical factors of surroundings.

  2. Water and air are the physical factors of an environment.

  3. Gas, light and temperature are its physical factors.

  4. It is a natural habitat for some animals.


Correct Option: A

Which of these animals is carnivorous?

  1. Deer

  2. Goat

  3. Cow

  4. Lion


Correct Option: D

Which of the following statements is appropriate for herbivores?

  1. Herbivores are secondary producers.

  2. Herbivores are primary consumers.

  3. Herbivores are primary producers and secondary consumers.

  4. Herbivores are primary producers.


Correct Option: B

Man belongs to the ____________ category of consumers.

  1. herbivores

  2. carnivores

  3. omnivores

  4. parasites


Correct Option: C

The organisms, which consume both plant as well as animal products, are known as

  1. herbivores

  2. carnivores

  3. piscivores

  4. omnivores


Correct Option: D

The trophic levels represent the

  1. steps in a community

  2. steps in a food chain

  3. steps in an ecosystem

  4. steps in a biosphere


Correct Option: B
Explanation:

The trophic levels represent the steps in a food chain.

The plants are placed in which trophic level in a food chain or in an ecological pyramid?

  1. First

  2. Second

  3. Third

  4. Fourth


Correct Option: A

Select the correct order of organisms in a food chain from the following data?

  1. Human, duck, fish, algae

  2. Algae, fish, duck, human

  3. Algae, duck, fish, human

  4. fish, duck, algae, human


Correct Option: B

Herbivores are found in which trophic level?

  1. First

  2. Second

  3. Third

  4. Fourth


Correct Option: B

Organisms in an area together interact with the non–living constituents of the environment, to form a/an

  1. ecosystem

  2. biome

  3. trophic level

  4. biotic factor


Correct Option: A

Which among the following animals is oviparous?

  1. Lion

  2. Dog

  3. Lizard

  4. Deer


Correct Option: C

Which of the following animals is a nocturnal animal?

  1. Deer

  2. Bat

  3. Sparrow

  4. Turtle


Correct Option: B

Which of the following statements is true?

  1. Deer is a carnivore.

  2. Lion is an autotrophic animal.

  3. Predators are usually lesser in number than their preys.

  4. Each species is limited in its total biomass by its trophic level.


Correct Option: D
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