Why Animals Need Classification
Walk into any natural history museum and the first thing that strikes you is sheer variety: a glass sponge no more complex than a loose cluster of cells, a jellyfish built from true tissues, a flatworm with rudimentary organs, and a beetle whose body is a small factory of specialised systems. All belong to a single kingdom, Animalia, and all are multicellular — yet they are organised along strikingly different lines.
This quiz tests the rationale behind animal classification:
- The scale of animal diversity and the number of described species
- Why observation alone cannot organise a kingdom
- How classification assigns a systematic position to newly described species
- The fundamental features used as the basis of classification
Answer all 15 questions. Each explanation reinforces the core idea: classification converts an overwhelming catalogue of species into an ordered, comparable and teachable scheme.
Q1. Approximately how many species of animals have been described till now?
The lesson states that over a million species of animals have been described till now, and this figure continues to climb as new forms are discovered and named.
Q2. As the number of described animal species grows very large, what becomes all the more important?
The source material states directly that as over a million species of animals have been described, the need for classification becomes all the more important.
Q3. Besides organising known animals, classification helps in which specific task?
The lesson explicitly says that classification also helps in assigning a systematic position to newly described species.
Q4. What is the very first thing a visitor notices on entering a natural history museum, according to the lesson?
The lesson opens by noting that the first thing that strikes you is sheer variety — animals with strikingly different structures and forms.
Q5. All members of the kingdom Animalia share which feature, even though their body organisation differs greatly?
All members of Animalia are multicellular, yet they do not exhibit the same pattern of organisation of cells.
Q6. Which of the following is NOT listed in the lesson as a fundamental feature used as a basis of animal classification?
The fundamental features listed are arrangement of cells, body symmetry, nature of coelom, and patterns of digestive, circulatory or reproductive systems. Body colour is not among them.
Q7. In spite of differences in structure and form, what makes classification of animals possible?
The lesson states that in spite of differences in structure and form, there are fundamental features common to various individuals, and these are used as the basis of classification.
Q8. In sponges, the cells are arranged as loose cell aggregates. What level of organisation does this represent?
Sponges exhibit the cellular level of organisation, in which cells are arranged as loose cell aggregates with some division of labour among them.
Q9. In coelenterates, cells performing the same function are arranged into tissues. This is called:
In coelenterates the arrangement of cells is more complex: cells performing the same function are grouped into tissues, giving the tissue level of organisation.
Q10. Which group is cited in the lesson as exhibiting the organ level of organisation?
Members of Platyhelminthes and other higher phyla exhibit the organ level, where tissues are grouped together to form organs specialised for particular functions.
Q11. At the organ level of organisation, what are tissues grouped together to form?
At the organ level, tissues are grouped together to form organs, each specialised for a particular function.
Q12. Which statement best captures why a biologist cannot simply memorise animals one by one?
With over a million species, memorising creature by creature is impossible; the mind needs structure and science needs a system of meaningful positions.
Q13. What does classification do with an overwhelming catalogue of species?
Classification converts an overwhelming catalogue of species into an ordered scheme in which similarities and differences become visible, comparable and teachable.
Q14. When a new species enters the record, what advantage does an existing classification system provide?
Classification lets a newly described species be assigned a systematic position without starting from scratch.
Q15. Which combination of features is used as the basis of animal classification according to the lesson?
The basis of classification includes arrangement of cells, body symmetry, nature of coelom, and patterns of digestive, circulatory or reproductive systems.