BIO340
Biodiversity
Midterms Exam Review (Qns & Ans)
2025
1. Which of the following is a key factor contributing to the loss
of biodiversity?
- A. Natural disasters
- B. Climate change
- C. Evolutionary adaptation
- D. Genetic diversity
ANS: B. Climate change
©/2025
, Rationale: Climate change is a significant factor contributing
to the loss of biodiversity by altering habitats and threatening the
survival of various species.
2. What is the primary purpose of the Convention on Biological
Diversity (CBD)?
- A. To promote agricultural practices
- B. To conserve biological diversity
- C. To support industrial development
- D. To regulate international trade
ANS: B. To conserve biological diversity
Rationale: The primary purpose of the Convention on
Biological Diversity (CBD) is to conserve biological diversity,
promote sustainable use of its components, and ensure fair sharing
of benefits from genetic resources.
Fill-in-the-Blank Questions
3. __________ is the variety of life forms within a given
ecosystem, biome, or the entire Earth, including the diversity
within species, between species, and of ecosystems.
©/2025
, ANS: Biodiversity
Rationale: Biodiversity refers to the variety of life forms
within a given ecosystem, biome, or the entire Earth,
encompassing diversity within species, between species, and of
ecosystems.
4. The __________ hypothesis suggests that greater biodiversity
leads to greater stability in ecosystems.
ANS: Diversity-Stability
Rationale: The Diversity-Stability hypothesis suggests that
ecosystems with greater biodiversity are more stable and resilient
to disturbances.
True/False Questions
5. True or False: Habitat fragmentation can lead to a decrease in
genetic diversity within species.
ANS: True
Rationale: Habitat fragmentation can isolate populations,
leading to a decrease in genetic diversity within species due to
reduced gene flow and smaller population sizes.
©/2025
, 6. True or False: Invasive species have no impact on native
biodiversity.
ANS: False
Rationale: Invasive species can significantly impact native
biodiversity by outcompeting, preying on, or introducing diseases
to native species, often leading to declines or extinctions.
Multiple Response Questions
7. Which of the following are components of biodiversity?
(Select all that apply)
- A. Genetic diversity
- B. Species diversity
- C. Ecosystem diversity
- D. Cultural diversity
ANSs: A, B, C
Rationale: Components of biodiversity include genetic
diversity, species diversity, and ecosystem diversity. Cultural
diversity is not a component of biological diversity.
©/2025
Biodiversity
Midterms Exam Review (Qns & Ans)
2025
1. Which of the following is a key factor contributing to the loss
of biodiversity?
- A. Natural disasters
- B. Climate change
- C. Evolutionary adaptation
- D. Genetic diversity
ANS: B. Climate change
©/2025
, Rationale: Climate change is a significant factor contributing
to the loss of biodiversity by altering habitats and threatening the
survival of various species.
2. What is the primary purpose of the Convention on Biological
Diversity (CBD)?
- A. To promote agricultural practices
- B. To conserve biological diversity
- C. To support industrial development
- D. To regulate international trade
ANS: B. To conserve biological diversity
Rationale: The primary purpose of the Convention on
Biological Diversity (CBD) is to conserve biological diversity,
promote sustainable use of its components, and ensure fair sharing
of benefits from genetic resources.
Fill-in-the-Blank Questions
3. __________ is the variety of life forms within a given
ecosystem, biome, or the entire Earth, including the diversity
within species, between species, and of ecosystems.
©/2025
, ANS: Biodiversity
Rationale: Biodiversity refers to the variety of life forms
within a given ecosystem, biome, or the entire Earth,
encompassing diversity within species, between species, and of
ecosystems.
4. The __________ hypothesis suggests that greater biodiversity
leads to greater stability in ecosystems.
ANS: Diversity-Stability
Rationale: The Diversity-Stability hypothesis suggests that
ecosystems with greater biodiversity are more stable and resilient
to disturbances.
True/False Questions
5. True or False: Habitat fragmentation can lead to a decrease in
genetic diversity within species.
ANS: True
Rationale: Habitat fragmentation can isolate populations,
leading to a decrease in genetic diversity within species due to
reduced gene flow and smaller population sizes.
©/2025
, 6. True or False: Invasive species have no impact on native
biodiversity.
ANS: False
Rationale: Invasive species can significantly impact native
biodiversity by outcompeting, preying on, or introducing diseases
to native species, often leading to declines or extinctions.
Multiple Response Questions
7. Which of the following are components of biodiversity?
(Select all that apply)
- A. Genetic diversity
- B. Species diversity
- C. Ecosystem diversity
- D. Cultural diversity
ANSs: A, B, C
Rationale: Components of biodiversity include genetic
diversity, species diversity, and ecosystem diversity. Cultural
diversity is not a component of biological diversity.
©/2025
