Genetic, Species and Ecosystem Diversity

🌿 Genetic, Species and Ecosystem Diversity

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⭐ 1. Genetic Diversity (Definition + Example)

Genetic diversity means variation in genes, alleles or genetic makeup within a species.

Example:

• different varieties of rice (Basmati, Sona Masuri)

• different dog breeds

• different mango varieties

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⭐ 2. Species Diversity (Definition + Example)

Species diversity refers to the variety of species (plants, animals, microbes) present in a particular region.

Example:

• A rainforest contains many species of birds, mammals, insects etc.

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⭐ 3. Ecosystem Diversity (Definition + Example)

Ecosystem diversity refers to the variety of different habitats and ecosystems present in a region.

Example:

• forests, grasslands, deserts, freshwater lakes, oceans etc.

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🟩 Difference Table (important for board exam)

Feature Genetic Diversity Species Diversity Ecosystem Diversity

Definition Variation in genes within species Variety of species in a region Variety of ecosystems in a region

Level within species between species between ecosystems

Example different varieties of mango tigers, elephants, deer in forest desert, forest, grassland

Importance adaptation, survival ecosystem balance global biodiversity

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🌎 Simple diagram (imaginary concept map)

Biodiversity

     |

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| | |

Genetic Species Ecosystem

(diversity of (diversity of (diversity of

genes) species) habitats)

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🟢 Very Short Notes (quick revision)

🔹 Genetic diversity

Variation in genes within species

🔹 Species diversity

Variety of species in a region

🔹 Ecosystem diversity

Variety of ecosystems in a region

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🟠 Previous Year Questions (VERY IMPORTANT)

Q1. Define genetic, species and ecosystem diversity. (most asked)

Q2. How is ecosystem diversity different from species diversity?

Q3. Give one example of genetic diversity.

Q4. Why is genetic variation important for survival?

Q5. Which biodiversity level shows maximum variation?

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🔵 MCQs for practice

1️⃣ Genetic diversity means –

a) variation between species

b) variation within ecosystems

c) variation within species

d) none

Answer: c

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2️⃣ Desert, forest and grassland represent –

a) species diversity

b) ecosystem diversity

c) genetic diversity

d) population

Answer: b

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3️⃣ Different varieties of rice represent –

a) species diversity

b) genetic diversity

c) ecosystem diversity

d) community diversity

Answer: b

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4️⃣ Western Ghats having many amphibians shows –

a) species diversity

b) ecosystem diversity

c) population diversity

Answer: a