Chapter Exam

Unit 8: Ecology & Environment — Online MCQ Test

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

Answer: C. Sunlight — Sunlight is a non-living factor, so it is an abiotic component. Grass, rabbit, and fungus are living components and therefore biotic.

Q: The transfer of energy from one organism to another in a sequence is called a:

Answer: A. Food chain — A food chain is a linear sequence showing how energy passes from one organism to the next. A food web is a network of interconnected food chains.

Q: The increase in population size when birth rate exceeds death rate is called:

Answer: C. Population growth — Population growth refers to the increase in the number of individuals in a population over time. It depends mainly on natality, mortality, immigration, and emigration.

Q: Which of the following is NOT a characteristic of an ecological pyramid?

Answer: D. It is used to study feeding relationships — Ecological pyramids represent trophic structure such as number, biomass, or energy, not feeding relationships directly. Feeding relationships are better shown by food chains and food webs.

Q: Which of the following pollutants is most closely associated with biomagnification in food chains?

Answer: B. DDT — DDT is a non-biodegradable pesticide that accumulates in organisms and increases in concentration at higher trophic levels. This process is called biomagnification.

ZOOLOGY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board

Practice Unit 8: Ecology & Environment with a free chapter-wise online MCQ test for Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY. This chapter covers: The final chapter examines ecosystem components abiotic biotic factors food chains energy flow biogeochemical cycles population ecology adaptational strategies and environmental po.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 8: Ecology & Environment — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 11 INTERMEDIATE 1 YEAR ZOOLOGY — Unit 8: Ecology & Environment, with answers and explanations. These are sample questions; the exam has its own separate question set.

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

A. Grass
B. Rabbit
C. Sunlight ✓
D. Fungus

Answer: C. Sunlight
Sunlight is a non-living factor, so it is an abiotic component. Grass, rabbit, and fungus are living components and therefore biotic.

The transfer of energy from one organism to another in a sequence is called a:

A. Food chain ✓
B. Food web
C. Trophic level
D. Ecological pyramid

Answer: A. Food chain
A food chain is a linear sequence showing how energy passes from one organism to the next. A food web is a network of interconnected food chains.

The increase in population size when birth rate exceeds death rate is called:

A. Dispersion
B. Natality
C. Population growth ✓
D. Migration

Answer: C. Population growth
Population growth refers to the increase in the number of individuals in a population over time. It depends mainly on natality, mortality, immigration, and emigration.

Which of the following is NOT a characteristic of an ecological pyramid?

A. It represents trophic levels
B. It may be upright or inverted
C. It always shows energy loss at each level
D. It is used to study feeding relationships ✓

Answer: D. It is used to study feeding relationships
Ecological pyramids represent trophic structure such as number, biomass, or energy, not feeding relationships directly. Feeding relationships are better shown by food chains and food webs.

Which of the following pollutants is most closely associated with biomagnification in food chains?

A. Biodegradable sewage
B. DDT ✓
C. Carbon dioxide
D. Oxygen

Answer: B. DDT
DDT is a non-biodegradable pesticide that accumulates in organisms and increases in concentration at higher trophic levels. This process is called biomagnification.