Chapter Exam

Chapter 7: Biosphere — Online MCQ Test

Q: Which of the following is an abiotic component of an ecosystem?

Answer: C. Sunlight — Abiotic components are non-living factors such as sunlight, temperature, water, and soil.

Q: In an ecosystem, which group breaks down dead organic matter and returns nutrients to the soil?

Answer: C. Decomposers — Decomposers like bacteria and fungi decompose dead matter and recycle nutrients.

Q: A coral reef ecosystem is most likely to be found in:

Answer: B. Shallow warm tropical seas — Coral reefs need warm, shallow, well-lit tropical marine waters for growth and survival.

Q: Which of the following pairs is correctly matched?

Answer: B. Desert — low rainfall and sparse vegetation — Deserts are characterized by very low rainfall and sparse vegetation due to harsh dry conditions.

GEOGRAPHY · CLASS 11 FIRST PUC · Karnataka State Board

Practice Chapter 7: Biosphere with a free chapter-wise online MCQ test for Karnataka State Board CLASS 11 FIRST PUC GEOGRAPHY. This chapter covers: This chapter examines environmental fundamentals ecosystem components major world biomes terrestrial aquatic biodiversity importance hotspot conservation and ecological balance.. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 7: Biosphere — Important Questions & Answers (FAQ)

Frequently asked questions from Karnataka State Board CLASS 11 FIRST PUC GEOGRAPHY — Chapter 7: Biosphere, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the biosphere?

A. The solid outer layer of the Earth only
B. The zone of life on Earth where land, water, and air interact ✓
C. Only the region covered by forests
D. The part of Earth below the crust

Answer: B. The zone of life on Earth where land, water, and air interact
The biosphere is the narrow life-supporting zone of the Earth where the atmosphere, hydrosphere, and lithosphere interact.

Which of the following is an abiotic component of an ecosystem?

A. Plants
B. Animals
C. Sunlight ✓
D. Microorganisms

Answer: C. Sunlight
Abiotic components are non-living factors such as sunlight, temperature, water, and soil.

In an ecosystem, which group breaks down dead organic matter and returns nutrients to the soil?

A. Producers
B. Consumers
C. Decomposers ✓
D. Predators

Answer: C. Decomposers
Decomposers like bacteria and fungi decompose dead matter and recycle nutrients.

A coral reef ecosystem is most likely to be found in:

A. Cold polar waters
B. Shallow warm tropical seas ✓
C. Deep freshwater lakes
D. Arid deserts

Answer: B. Shallow warm tropical seas
Coral reefs need warm, shallow, well-lit tropical marine waters for growth and survival.

Which of the following pairs is correctly matched?

A. Tundra — hot and humid climate
B. Desert — low rainfall and sparse vegetation ✓
C. Taiga — tropical evergreen forest
D. Savanna — permanently frozen ground

Answer: B. Desert — low rainfall and sparse vegetation
Deserts are characterized by very low rainfall and sparse vegetation due to harsh dry conditions.