CONS 127 MIDTERM EXAM / UNIVERSITY OF BRITISH
COLUMBIA CONS 127 ACTUAL MIDTERM EXAM 2026/2027
ALL COMPLETE 40 ACCURATE QUESTIONS AND CORRECT
VERIFIED ANSWERS WITH RATIONALES (A NEW UPDATED
VERSION) |GUARANTEED PASS A+
Midterm Examination
Time: 75 minutes
Total Marks: 40
Instructions:
This exam contains 40 multiple-choice questions.
Select the one best answer for each question.
No aids are permitted unless specified.
Mark all answers clearly.
Multiple Choice Questions
1. Biodiversity is most accurately defined as:
A. the number of species in an ecosystem
B. the total biomass in a region
C. genetic, species, and ecosystem variability
D. the number of threatened species globally
Correct Answer: c. genetic, species, and ecosystem variability
Rationale: Biodiversity encompasses variation at multiple levels.
Species richness alone is insufficient.
2. Which of the following best characterizes a keystone species?
, A. most abundant species in a system
B. species with disproportionate ecological impact
C. largest-bodied predator
D. legally protected species
Correct Answer: b. species with disproportionate ecological impact
Rationale: Keystone species strongly influence ecosystem structure
relative to their abundance.
3. Habitat fragmentation primarily results in:
A. increased gene flow
B. increased core habitat
C. isolated subpopulations
D. decreased edge effects
Correct Answer: c. isolated subpopulations
Rationale: Fragmentation isolates populations, reducing connectivity
and increasing extinction risk.
4. The precautionary principle states that:
A. action should wait for full certainty
B. uncertainty justifies inaction
C. lack of certainty should not delay harm prevention
D. economic growth overrides risk
Correct Answer: c. lack of certainty should not delay harm prevention
Rationale: Preventive measures are justified even under scientific
uncertainty.
COLUMBIA CONS 127 ACTUAL MIDTERM EXAM 2026/2027
ALL COMPLETE 40 ACCURATE QUESTIONS AND CORRECT
VERIFIED ANSWERS WITH RATIONALES (A NEW UPDATED
VERSION) |GUARANTEED PASS A+
Midterm Examination
Time: 75 minutes
Total Marks: 40
Instructions:
This exam contains 40 multiple-choice questions.
Select the one best answer for each question.
No aids are permitted unless specified.
Mark all answers clearly.
Multiple Choice Questions
1. Biodiversity is most accurately defined as:
A. the number of species in an ecosystem
B. the total biomass in a region
C. genetic, species, and ecosystem variability
D. the number of threatened species globally
Correct Answer: c. genetic, species, and ecosystem variability
Rationale: Biodiversity encompasses variation at multiple levels.
Species richness alone is insufficient.
2. Which of the following best characterizes a keystone species?
, A. most abundant species in a system
B. species with disproportionate ecological impact
C. largest-bodied predator
D. legally protected species
Correct Answer: b. species with disproportionate ecological impact
Rationale: Keystone species strongly influence ecosystem structure
relative to their abundance.
3. Habitat fragmentation primarily results in:
A. increased gene flow
B. increased core habitat
C. isolated subpopulations
D. decreased edge effects
Correct Answer: c. isolated subpopulations
Rationale: Fragmentation isolates populations, reducing connectivity
and increasing extinction risk.
4. The precautionary principle states that:
A. action should wait for full certainty
B. uncertainty justifies inaction
C. lack of certainty should not delay harm prevention
D. economic growth overrides risk
Correct Answer: c. lack of certainty should not delay harm prevention
Rationale: Preventive measures are justified even under scientific
uncertainty.
