With reference to Species Diversity, consider the following statements: 1. It refers solely to the genetic variation within a single species. 2. It can be measured through richness, abundance, and types. 3. Areas with high species diversity are often termed as 'hotspots of diversity'. Which of the statements given above is/are correct?

Correct Option The correct option is 2 and 3 only. Explanation Biodiversity is generally classified into three levels: Genetic Diversity, Species Diversity, and Ecosystem Diversity. Species diversity specifically refers to the variety of living organisms within a given region. Statement-wise Analysis - Statement 1 is Incorrect: The variation of genes within a single species is defined as Genetic Diversity. Species Diversity refers to the variety of species within a habitat or a region, not the genetic makeup within one species. - Statement 2 is Correct: Species diversity is measured using parameters such as Species Richness (the number of different species per unit area) and Species Abundance or Evenness (the relative number of individuals of different species). It also considers the types of species (taxonomic or phylogenetic diversity). - Statement 3 is Correct: Areas that exhibit high levels of species diversity, particularly those with high endemism (species found nowhere else), are technically termed Biodiversity Hotspots. Key Takeaway Species Diversity is determined by Species Richness (count of species) and Species Evenness (relative abundance), whereas Genetic Diversity concerns variations within a single species.

With reference to Species Diversity,… - NCERT Class 11 Geography MCQ

NCERT Class 11 Geography — Chapter 1: Life on the earth

mcqmedium

With reference to Species Diversity, consider the following statements:

It refers solely to the genetic variation within a single species.
It can be measured through richness, abundance, and types.
Areas with high species diversity are often termed as 'hotspots of diversity'.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT Fundamentals of Physical Geography · Page 116

Options

A2 and 3 only
B2 only
C1 and 2 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is 2 and 3 only.

Explanation

Biodiversity is generally classified into three levels: Genetic Diversity, Species Diversity, and Ecosystem Diversity. Species diversity specifically refers to the variety of living organisms within a given region.

Statement-wise Analysis

Statement 1 is Incorrect: The variation of genes within a single species is defined as Genetic Diversity. Species Diversity refers to the variety of species within a habitat or a region, not the genetic makeup within one species.
Statement 2 is Correct: Species diversity is measured using parameters such as Species Richness (the number of different species per unit area) and Species Abundance or Evenness (the relative number of individuals of different species). It also considers the types of species (taxonomic or phylogenetic diversity).
Statement 3 is Correct: Areas that exhibit high levels of species diversity, particularly those with high endemism (species found nowhere else), are technically termed Biodiversity Hotspots.

Key Takeaway

Species Diversity is determined by Species Richness (count of species) and Species Evenness (relative abundance), whereas Genetic Diversity concerns variations within a single species.

Your note

More from Chapter 1: Life on the earth

Which of the following functions are performed by species in an ecosystem? 1. Capture and store energy. 2. Decompose organic materials. 3. Fix atmospheric gases. 4. Regulate the climate. Select the correct answer using the code given below:

medium

The Convention of Biodiversity was signed at the Earth Summit held in:

easy

In India, the Wild Life (Protection) Act was passed in which year?

easy

medium

Consider the following statements regarding Hotspots: 1. People living in hotspots depend on species-rich ecosystems for food, firewood and timber. 2. Hotspots are areas where biodiversity is least threatened. 3. The hotspots concept was proposed by Norman Myers/Conservation International. Which of the statements given above is/are correct?

medium

Keep practising Chapter 1: Life on the earth

Work through every question from this NCERT chapter.

Browse all NCERT Class 11 Geography chapters