Consider the following statements about the "forest floor": 1. The forest floor is generally dark due to the dense canopy above. 2. The forest floor is completely devoid of any dead or decaying matter. 3. The forest floor is sterile and supports no living organisms. Which of the statements given above is/are correct?

Correct Option The correct option is (a). Explanation The forest floor is the lowest stratum of a forest ecosystem, situated beneath the understory and the canopy. It functions as the primary site for decomposition and nutrient cycling. Statement-wise Analysis - Statement 1 is Correct: In dense forests, the canopy layer intercepts the majority of solar radiation. As a result, the forest floor receives very little direct sunlight, creating a generally dark, cool, and damp environment. - Statement 2 is Incorrect: The forest floor is not devoid of matter; rather, it is characterized by a rich accumulation of organic debris known as litter or detritus. This includes fallen leaves, twigs, branches, bark, and animal remains waiting to be decomposed. - Statement 3 is Incorrect: The forest floor is biologically vibrant rather than sterile. It supports a complex community of organisms, including decomposers (bacteria and fungi), detritivores (such as earthworms and millipedes), and various insects. These organisms are essential for breaking down organic matter and recycling nutrients into the soil. Key Takeaway The forest floor is a dark, moisture-retentive layer critical for nutrient recycling, characterized by high concentrations of decaying organic matter and a diverse population of decomposers.

Consider the following statements about the "forest floor": 1. The… - NCERT Class 7 Environment & Ecology MCQ

NCERT Class 7 Environment & Ecology — Chapter 1: Forests: our lifeline

mcqmedium

Consider the following statements about the "forest floor":

The forest floor is generally dark due to the dense canopy above.
The forest floor is completely devoid of any dead or decaying matter.
The forest floor is sterile and supports no living organisms.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Science - class 7 · Page 146

Options

A1 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (a).

Explanation

The forest floor is the lowest stratum of a forest ecosystem, situated beneath the understory and the canopy. It functions as the primary site for decomposition and nutrient cycling.

Statement-wise Analysis

Statement 1 is Correct: In dense forests, the canopy layer intercepts the majority of solar radiation. As a result, the forest floor receives very little direct sunlight, creating a generally dark, cool, and damp environment.
Statement 2 is Incorrect: The forest floor is not devoid of matter; rather, it is characterized by a rich accumulation of organic debris known as litter or detritus. This includes fallen leaves, twigs, branches, bark, and animal remains waiting to be decomposed.
Statement 3 is Incorrect: The forest floor is biologically vibrant rather than sterile. It supports a complex community of organisms, including decomposers (bacteria and fungi), detritivores (such as earthworms and millipedes), and various insects. These organisms are essential for breaking down organic matter and recycling nutrients into the soil.

Key Takeaway

The forest floor is a dark, moisture-retentive layer critical for nutrient recycling, characterized by high concentrations of decaying organic matter and a diverse population of decomposers.

Your note

More from Chapter 1: Forests: our lifeline

Which of the following constitutes the primary group of pollinating agents in a forest ecosystem?

easy

Consider the following statements regarding the interdependence of plants and animals in a forest: 1. Animals depend on plants for food and shelter. 2. Plants are completely independent of animals for their reproduction. 3. Plants depend on animals for the supply of nutrients through decomposition of droppings. Which of the statements given above is/are correct?

medium

With reference to the role of forests in the water cycle, consider the following statements: 1. Trees release water vapour into the air through the process of condensation. 2. The forest canopy intercepts raindrops, preventing them from hitting the ground directly. 3. Forests facilitate the infiltration of water into the ground. Which of the statements given above is/are correct?

medium

With reference to nutrient cycling in a forest, consider the following statements: 1. Nutrients are cycled back into the soil through decomposition. 2. Humus prevents nutrients from being released into the soil. 3. Roots of living plants absorb nutrients released by decomposers. Which of the statements given above is/are correct?

medium

easy

Keep practising Chapter 1: Forests: our lifeline

Work through every question from this NCERT chapter.

Browse all NCERT Class 7 Environment & Ecology chapters