Free Classification and Taxonomy MCQs with Answers

1. In the biology laboratory, a student observed the following specimen.The identification and distinguishing feature of this specimen is:

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: The figure shows a mussel. Its characteristic is bivalved shell.A mussel is an aquatic mollusk with a soft body protected by a hard, two-part (bivalved) shell. It usually lives in freshwater or marine environments and attaches itself to rocks or other surfaces.In contrast, a slug has a soft, elongated body with no shell So Option A correctly represents the figure.

2. Given is the classification of human and chimpanzee. The taxonomic categories in which humans and chimpanzee differ are:

• A. Order and Family
• B. Family and Genus
• C. Order and Species
• D. Genus and Species

Explanation: The correct answer is option D: genus and species. When classifying humans (Homo sapiens) and chimpanzee (Pan troglodytes), they belong to the different genus (Homo for humans and Pan for chimpanzee) and different species (sapiens and troglodytes). Genus and species represent the most specific levels of classification in the Linnaean system. The other options are incorrect because they either involve broader categories or incorrect combinations of taxonomic levels.

3. Select the incorrect pair given in the table of classification below:

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E

Explanation: Explanation for this question will be added soon.

4. A group of organisms with similar morphology and physiology. which can breed together to produce fertile offspring is called:

• A. Species
• B. Domain
• C. Kingdom
• D. Diversity

Explanation: Species is defined as a group of organisms capable of interbreeding and creating fertile offspring.

5. What was the correct classification according to Linnaeus?

• A. Similar genera in one family
• B. Similar species in one genus
• C. Similar familes in one order
• D. All of above

Explanation: Linnaean classification indeed involved grouping organisms hierarchically based on similarities, encompassing similar species in one genus, similar genera in one family, and similar families in one order. Therefore, the accurate choice is "All of the Above." Linnaeus organized living organisms into a nested hierarchy that considered similarities at various taxonomic levels.

6. Name the vertebrates which are without jaws.

• A. Osteichthyes
• B. Cyclostomata
• C. Chondrichthyes
• D. None of these

Explanation: Cyclostomi, often referred to as Cyclostomata, is a group of vertebrates that comprises the living jawless fishes: the lampreys and hagfishes.

7. Taxonomy includes the arrangement of organisms into different taxa. Which of the following represents the correct hierarchy of various taxa of classification?

• A. Species, genus, family, order, class, phylum
• B. Order, family, class, phylum, kingdom
• C. Species, genus, family, class, order, phylum
• D. Species, genus, order, family, class, phylum

Explanation: The correct hierarchy of various taxa in biological classification is:Species, genus, family, order, class, phylumExplanation:1. Species: The fundamental unit of classification, consisting of organisms that can interbreed and produce fertile offspring.2. Genus: A group of closely related species.3. Family: A group of related genera.4. Order: A group of related families.5. Class: A group of related orders.6. Phylum: A group of related classes.This hierarchical arrangement helps organize and categorize living organisms based on their evolutionary relationships.Mnemonics, that one can use to memorize the taxonomic hierarchy, which is Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species, in that specific order are as follows:-"Dear King Philip Came Over For Good Soup" (the first letter of each word corresponds to a taxa)- Kingdom Phylum went to a Class and Ordered his Family to look for a Genius(Genus) who is a rare Species.The diagram, given below, illustrates the hierarchy.

8. Bauthinia variegate (kachnar) belongs to family:

• A. Leguminosae
• B. Soldnacoae
• C. Brassicaceae
• D. Graminea

Explanation: Bauhinia variegata is a species of flowering plant in the legume family, Fabaceae. The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family.

9. Raphanus sativus belongs to family :

• A. Poaceae
• B. Fabaceae
• C. Brassicaceae

Explanation: Raphanus sativus, commonly known as radish, belongs to the family Brassicaceae (also known as Cruciferae). Brassicaceae is a family of flowering plants that includes many well-known vegetables and herbs, such as cabbage, broccoli, cauliflower, kale, and mustard.

10. Lycopersicum esculenium is commonly known as

• A. Gram
• B. Tomato
• C. Potato
• D. Red pepper

Explanation: The correct answer is Tomato. Lycopersicum esculentum is the scientific name for the tomato plant, which is part of the nightshade family Solanaceae. The other options are different species: Gram (chickpea) is a legume, Potato is Solanum tuberosum, and Red pepper is Capsicum annuum, all unrelated to the tomato's scientific designation.