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Ch 1 Eco Class 9 mcq. We covered all the Ch 1 Eco Class 9 mcq in this post for free so that you can practice well for the exam.
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Ch 1 Eco Class 9 Objective mcq for Students
In grassland ecosystems, why do grasses continue to dominate instead of being replaced by trees during ecological succession?
A) The action of insects and fungi
B) Insufficient sunlight and lack of nutrients
C) Constraints of water availability and frequent fires
D) None of these
Option c – Constraints of water availability and frequent fires
Which sequence correctly represents the stages involved in biotic succession?
A) Nudation → Migration → Ecesis → Reaction → Stabilization
B) Migration → Nudation → Ecesis → Reaction → Stabilization
C) Ecesis → Migration → Nudation → Reaction → Stabilization
D) Stabilization → Reaction → Nudation → Migration → Ecesis
Option a – Nudation → Migration → Ecesis → Reaction → Stabilization
Which option shows the correct hierarchy of biological organization from an individual organism up to the biosphere?
A) Population → Ecosystem → Community → Landscape
B) Landscape → Community → Ecosystem → Population
C) Population → Community → Ecosystem → Landscape
D) Population → Landscape → Community → Ecosystem
Option c – Population → Community → Ecosystem → Landscape
Examine the following statements related to ecosystems: 1. The word “ecosystem” was introduced by A. G. Tansley. 2. Organisms capable of producing their own Food are called autotrophs. 3. Consumers obtain Food through photosynthesis. 4. Decomposers transform Inorganic substances into Organic Matter. Which of the statements given above are correct?
A) Only 1 and 2
B) Only 1 and 3
C) Only 2 and 4
D) Only 3 and 4
Option a – Only 1 and 2
Which of the following statements correctly describe bionomics?. 1. It refers to the management of life. 2. It is another term for Ecology. 3. It emphasizes the importance of natural systems that affect human systems.
A) Only 1
B) Only 1 and 2
C) Only 2 and 3
D) 1, 2 and 3
Option c – Only 2 and 3
With reference to ecosystem productivity, marine upwelling regions are significant because they enhance productivity by bringing which of the following to the surface?. 1. Decomposer microorganisms 2. Nutrients 3. Bottom-dwelling Organisms
A) Only 1 and 2
B) Only 2
C) Only 2 and 3
D) Only 3
Option b – Only 2
We covered all the ch 1 eco Class 9 mcq above in this post for free so that you can practice well for the exam.
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Also, check out:
- Environment and Ecology Test Series
- Ecology and Environment Vision IAS
- Environment and Ecology UPSC Syllabus
