Ecosystem

Q.

The structural and functional unit of an environment is called?

Q. The ecological niche describes how an organism or population responds to the distribution of resources and competitors.

1. False
2. True

Q.

Energy enters in a food chain through:

1. Tertiary organism

2. Producers

3. Secondary Organism

4. Primary consumers

Q. The frog that feeds on an insect is a

1. Secondary consumer
2. Decomposer
3. Tertiary consumer
4. Primary consumer

Q.

What are some goods and services provided by natural ecosystems?

Q. ecosystem

Q.

What is an ecosytem ? Name its two components.

Q.

The functional unit of biosphere which plays a major role in balancing and maintaining equilibrium in nature is ____.

1. Biotic community

2. Species of plants and animals

3. Ecosystem

4. Biome

Q. Which of the following is true about an ecosystem?

1. All of the above
2. Consists of biological community and physical environment
3. May have fixed or varying environment
4. Can be as small as a droplet of water or as large as Earth.

Q. In a forest ecosystem, green plants are

1. Primary producers
2. Primary consumers
3. Decomposers
4. Consumers

Q. The first trophic level in any kind of food chain is always a green plants, because of

1. Their wide distribution.
2. They alone have a capacity to fix atmospheric CO${}_2$, in the presence/absence of sunlight.
3. Their richness in chlorophyll.
4. Their capacity to convert light energy to chemical energy.

Q. When frog eats grasshopper which thrives on green plant, the frog is

1. Primary producer
2. Primary carnivore
3. Top consumer
4. Herbivore

Q. Mr. X is eating curd or yoghurt. For this food intake in a food chain Mr. X should be considered as occupying

1. First trophic level
2. Third trophic level
3. Second trophic level
4. Fourth trophic level

Q.

Give one example of the following:

An ecosystem

Q. Grasshopper in grassland is a

1. Producer
2. Herbivore
3. None of the above
4. Carnivore

Q. Green plants constitute

1. First trophic level
2. Second trophic level
3. Third trophic level
4. Complete food chain

Q.

Ecosystem comprises only of living organisms.

1. True

2. False

Q. In biotic community, primary consumers are

1. Carnivores
2. Omnivores
3. Herbivores
4. Detrivores