Diversity in Living Organisms (Class 9 Science)

Living organisms are classified into different kingdoms based on their characteristics. The binomial nomenclature system helps scientists organize and name

Diversity in Living Organisms (Class 9 Science)

Living organisms are classified into different kingdoms based on their characteristics. The binomial nomenclature system helps scientists organize and name

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TL;DR: Living organisms are classified into different kingdoms based on their characteristics. The binomial nomenclature system helps scientists organize and…

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Living organisms are classified into different kingdoms based on their characteristics. The binomial nomenclature system helps scientists organize and name

Diversity in Living Organisms MCQs with Answers & Explanations

Q1. Who developed the system of binomial nomenclature?

  1. Carl Linnaeus ✓ (correct)
  2. Jean-Baptiste Lamarck
  3. Charles Darwin
  4. Ernst Haeckel

Explanation: Carl Linnaeus developed binomial nomenclature, a system of naming organisms using a two-part name: genus and species.

Q2. In the scientific name Felis catus, 'Felis' refers to the:

  1. Order
  2. Genus ✓ (correct)
  3. Species
  4. Family

Explanation: Felis is the genus and catus is the species. The genus is always capitalized and the species is lowercase.

Q3. Which of the following is the correct order of classification from largest to smallest group?

  1. Kingdom, Order, Phylum, Class, Family, Genus, Species
  2. Kingdom, Class, Phylum, Order, Family, Genus, Species
  3. Kingdom, Phylum, Class, Order, Family, Genus, Species ✓ (correct)
  4. Species, Genus, Family, Order, Class, Phylum, Kingdom

Explanation: The correct hierarchy is Kingdom > Phylum > Class > Order > Family > Genus > Species (often remembered as KPCOFGS).

Q4. Which kingdom includes organisms that are multicellular and feed on dead organic matter?

  1. Animalia
  2. Protista
  3. Plantae
  4. Fungi ✓ (correct)

Explanation: Fungi are multicellular (mostly) heterotrophs that secrete digestive enzymes and absorb nutrients from dead organic matter.

Q5. Prokaryotes are organisms that lack:

  1. Nucleus ✓ (correct)
  2. Membrane
  3. Cell wall
  4. Ribosomes

Explanation: Prokaryotes lack a membrane-bound nucleus. Bacteria and archaea are prokaryotes.

Q6. Which of the following organisms is a eukaryote?

  1. Archaea
  2. Amoeba ✓ (correct)
  3. Cyanobacteria
  4. Bacteria

Explanation: Amoeba is a eukaryote (has a nucleus and membrane-bound organelles). Bacteria, cyanobacteria, and archaea are prokaryotes.

Q7. The characteristic feature of members of Kingdom Plantae is that they are:

  1. Can produce their own food using chemosynthesis
  2. Heterotrophic and move freely
  3. Autotrophic and have cell walls ✓ (correct)
  4. Lack cell walls

Explanation: Plants are autotrophic (produce their own food through photosynthesis) and have rigid cell walls made of cellulose.

Q8. Viruses are not considered living because they:

  1. Cannot move
  2. Are too small
  3. Do not consume food
  4. Cannot reproduce independently ✓ (correct)

Explanation: Viruses cannot reproduce without a host cell; they lack the machinery to synthesize proteins and reproduce independently, making them non-living.

Q9. Which level of classification groups organisms that can interbreed and produce fertile offspring?

  1. Species ✓ (correct)
  2. Family
  3. Order
  4. Genus

Explanation: A species is defined as a group of organisms that can interbreed and produce fertile offspring.

Q10. The kingdom that includes both plants and animals is:

  1. Animalia
  2. Protista ✓ (correct)
  3. Plantae
  4. Monera

Explanation: Protista includes diverse single-celled and simple multicellular eukaryotes, some plant-like and some animal-like.

Frequently Asked Questions

Why is classification of living organisms important?

Classification helps scientists organize the enormous diversity of life, understand evolutionary relationships, and communicate about organisms using standardized names. It also helps us understand how organisms are related and adapted to their environments.

How is the five-kingdom classification different from the three-domain system?

The five-kingdom system (Monera, Protista, Fungi, Plantae, Animalia) is based on cellular organization and nutrition mode. The three-domain system (Bacteria, Archaea, Eukarya) is based on molecular and genetic differences, placing archaea in a separate domain.

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