Quiz: Taxonomic Categories and Hierarchy
Classification in biology is not a single act of labelling — it is a hierarchy of steps, each step occupying a defined rank or category. Taken together, these categories constitute the taxonomic hierarchy, the scaffolding on which the whole diversity of life is arranged.
This quiz tests your grasp of the following ideas:
- Classification as a hierarchy of steps, each representing a rank or category
- Category as a unit of classification, commonly termed a taxon (plural: taxa)
- Groups represent category; category further denotes rank
- Taxonomic groups as distinct biological entities, not merely morphological aggregates
- The common categories: kingdom, phylum or division, class, order, family, genus, species
- Species as the lowest category, and knowledge of characters as the basic requirement for placement
Work carefully through each question — the aim is a working grasp of how biologists convert observable characters into a stable position in the living world.
Q1. Classification in biology is best described as:
Classification is not a single step process but involves a hierarchy of steps in which each step represents a rank or category.
Q2. All the categories together constitute the:
Since each category is a part of the overall taxonomic arrangement, all categories together constitute the taxonomic hierarchy.
Q3. A category, referred to as a unit of classification, is commonly termed a:
Each category, referred to as a unit of classification, in fact represents a rank and is commonly termed a taxon.
Q4. The plural of the term taxon is:
The term taxon has the plural taxa.
Q5. Insects are given a rank or category because they share common features such as:
Insects represent a group of organisms sharing common features like three pairs of jointed legs, and thus were given a rank or category.
Q6. Which statement correctly expresses the relationship between groups, category and rank?
The lesson states clearly: groups represent category, and category further denotes rank.
Q7. Taxonomic groups and categories are best described as:
These taxonomic groups and categories are distinct biological entities and not merely morphological aggregates.
Q8. Which of the following is NOT one of the common categories developed by taxonomical studies of all known organisms?
The common categories are kingdom, phylum or division, class, order, family, genus and species. Population is not one of them.
Q9. For plants, the category corresponding to phylum is termed:
The common categories include phylum or division, where division is the term used for plants.
Q10. In the taxonomic hierarchy, the lowest category for all organisms, plant or animal, is:
All organisms, including those in the plant and animal kingdoms, have species as the lowest category.
Q11. The basic requirement for placing an organism in various categories is:
The basic requirement is the knowledge of characters of an individual or group of organisms, which helps identify similarities and dissimilarities.
Q12. Knowledge of characters helps in identifying:
Knowledge of characters helps in identifying similarities and dissimilarities among the individuals of the same kind of organisms as well as of other kinds of organisms.
Q13. In the name Mangifera indica, the word indica represents the:
In Mangifera indica, indica is the specific epithet, while Mangifera is the genus.
Q14. In the name Panthera leo, the word Panthera represents the:
The first word Panthera is the genus and represents a higher level of taxon or category than the specific epithet leo.
Q15. Which of the following is a specific epithet of the genus Solanum mentioned in the lesson?
Solanum includes species like nigrum, along with tuberosum. Leo belongs to Panthera and indica to Mangifera.
Q16. Panthera tigris and Panthera leo belong to the same genus but differ in their:
Panthera has another specific epithet called tigris besides leo; the specific epithet differs while the genus remains the same.
Q17. Taxonomic studies consider a group of individual organisms with fundamental similarities as a:
Taxonomic studies consider a group of individual organisms with fundamental similarities as a species.
Q18. One species can be distinguished from another closely related species on the basis of:
One should be able to distinguish one species from the other closely related species based on the distinct morphological differences.
Q19. Each genus may have:
Each genus may have one or more than one specific epithet representing different organisms but having morphological similarities.
Q20. Which sequence correctly arranges the common categories from the broadest grouping down to the narrowest?
The hierarchy runs from the broadest grouping to the narrowest: kingdom, phylum or division, class, order, family, genus and species.