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Quiz Chapter 8: Biodiversity

10 questions · Form 5 Biology Bab 8: Biodiversity

10 questions · plays in fullscreen

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which tool uses paired contrasting physical characteristics to identify unknown biological specimens?

  1. Phylogenetic tree
  2. Dichotomous key
  3. Cladogram
  4. Taxonomic hierarchy
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Answer: B

A dichotomous key provides series of two-choice structural statements leading to specimen identification.

2. What term describes the biological cleanup method of using microorganisms to neutralize marine oil spills?

  1. Eutrophication
  2. Bioremediation
  3. Biological control
  4. Ammonification
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Answer: B

Bioremediation uses microorganisms or plants to break down and remove environmental pollutants.

3. Which microorganism plays a vital role in converting nitrite ions into nitrate ions in the nitrogen cycle?

  1. Rhizobium sp.
  2. Nitrosomonas sp.
  3. Nitrobacter sp.
  4. Azotobacter sp.
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Answer: C

Nitrobacter sp. oxidized nitrites (NO2-) into nitrates (NO3-) during nitrification.

4. Which level of biodiversity is demonstrated by the various cultivated breeds of domestic dogs or distinct varieties of rice?

  1. Ecosystem diversity
  2. Species diversity
  3. Genetic diversity
  4. Community diversity
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Answer: C

Genetic diversity refers to the variation of genes within a single species population.

5. Which taxonomic ranking represents the broadest and most inclusive level in modern biological classification?

  1. Domain
  2. Kingdom
  3. Phylum
  4. Species
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Answer: A

Domain is the highest and most inclusive taxonomic rank above Kingdom.

6. What is the primary action of Nitrosomonas sp. in the nitrogen cycle?

  1. Fixes N2 gas into ammonium ions
  2. Oxidizes ammonium ions into nitrite ions
  3. Converts nitrite ions into nitrate ions
  4. Reduces nitrate ions into N2 gas
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Answer: B

Nitrosomonas sp. converts ammonium ions (NH4+) into nitrite ions (NO2-).

7. Which organism is a photosynthetic unicellular protist possessing a flagellum and a light-sensitive eyespot?

  1. Amoeba sp.
  2. Euglena sp.
  3. Paramecium sp.
  4. Plasmodium sp.
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Answer: B

Euglena sp. is a flagellated unicellular protist containing chloroplasts.

8. Who introduced the modern binomial system of nomenclature for naming living organisms?

  1. Charles Darwin
  2. Gregor Mendel
  3. Carl Linnaeus
  4. Robert Hooke
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Answer: C

Carl Linnaeus devised the two-part Latin binomial naming system for biology.

9. What is the correct way to write the scientific name of the Asian elephant according to binomial nomenclature rules when typed?

  1. Elephas Maximus
  2. elephas maximus
  3. Elephas maximus
  4. Elephas Maximus
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Answer: C

The genus name starts with a capital letter, the species epithet is lowercase, and both words must be italicized in print.

10. Why are viruses excluded from the six-kingdom classification system?

  1. They lack genetic material
  2. They are obligate non-cellular entities requiring host cell machinery to reproduce
  3. They possess cell walls made of chitin
  4. They carry out autotrophic photosynthesis
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Answer: B

Viruses are non-living, non-cellular particles consisting only of nucleic acid and a capsid; they can reproduce only inside host cells.

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