With reference to the 'Ecosystem', consider the following statements: 1. It consists only of the living components in an area. 2. It includes non-living components such as climate, soil, and river deltas. 3. Small animals like snakes and frogs are considered part of the ecosystem. Which of the statements given above is/are correct?

The correct option is (c). Explanation An ecosystem is defined as a functional unit of nature where living organisms interact among themselves and also with the surrounding physical environment. - Statement 1 is Incorrect: An ecosystem is not limited to living components. It is a complete system composed of two main components: biotic (living) and abiotic (non-living). These components function together as a unit. - Statement 2 is Correct: The abiotic components include physical factors such as climatic conditions (temperature, rainfall, light), edaphic factors (soil structure and composition), and topographical features like river deltas. These non-living elements provide the necessary environment and nutrients for living organisms. - Statement 3 is Correct: The biotic component includes all living organisms within the area, regardless of size or trophic level. Small animals such as snakes, frogs, insects, and microorganisms are essential parts of the ecosystem, playing specific roles in food chains and nutrient cycles. Key Takeaway: An ecosystem is characterized by the interaction and interdependence of biotic communities (plants, animals, microbes) and their abiotic environment (air, water, soil, sunlight).

With reference to the 'Ecosystem', consider the… - NCERT Class 8 Environment & Ecology MCQ

NCERT Class 8 Environment & Ecology — Chapter 1: Conservation of plants and animals

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With reference to the 'Ecosystem', consider the following statements:

It consists only of the living components in an area.
It includes non-living components such as climate, soil, and river deltas.
Small animals like snakes and frogs are considered part of the ecosystem.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 8 · Page 7

Options

A1 and 2 only
B2 only
C2 and 3 only
D1, 2 and 3

Did you get this right?

Solution

The correct option is (c).

Explanation

An ecosystem is defined as a functional unit of nature where living organisms interact among themselves and also with the surrounding physical environment.

Statement 1 is Incorrect: An ecosystem is not limited to living components. It is a complete system composed of two main components: biotic (living) and abiotic (non-living). These components function together as a unit.
Statement 2 is Correct: The abiotic components include physical factors such as climatic conditions (temperature, rainfall, light), edaphic factors (soil structure and composition), and topographical features like river deltas. These non-living elements provide the necessary environment and nutrients for living organisms.
Statement 3 is Correct: The biotic component includes all living organisms within the area, regardless of size or trophic level. Small animals such as snakes, frogs, insects, and microorganisms are essential parts of the ecosystem, playing specific roles in food chains and nutrient cycles.

Key Takeaway: An ecosystem is characterized by the interaction and interdependence of biotic communities (plants, animals, microbes) and their abiotic environment (air, water, soil, sunlight).

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More from Chapter 1: Conservation of plants and animals

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Consider the following statements regarding soil and deforestation: 1. The presence of trees significantly accelerates soil erosion. 2. The humus content in the soil decreases when the top layer is removed. 3. Deforestation generally leads to a decrease in the nutrient content of the soil.

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What is the primary reason for the lowering of the groundwater table in deforested areas?

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With reference to the recycling of paper, consider the following statements: 1. It takes only one full-grown tree to make one tonne of paper. 2. Paper can be recycled multiple times. 3. Recycling paper saves energy, water, and reduces the use of harmful chemicals. Which of the statements given above is/are correct?

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