1. Classification of organisms is considered which type of biological process?
Correct Answer: B
Classification involves hierarchy of steps where each step represents a rank or category. It is not done in one single step but follows multiple levels.
2. Each step in biological classification represents what?
Correct Answer: B
In classification, every step represents a rank or category. These ranks together form the taxonomic hierarchy.
3. All taxonomic categories together form which structured system?
Correct Answer: C
When all taxonomic categories are arranged in order, they form the taxonomic hierarchy.
4. A taxonomic category representing a rank is commonly called what?
Correct Answer: B
Each category or rank in classification is called a taxon. The plural form is taxa.
5. Insects are grouped together because they share which common feature?
Correct Answer: B
Insects share common features such as three pairs of jointed legs. This common character allows them to be grouped together.
6. Taxonomic groups are considered what type of biological entities?
Correct Answer: C
Taxonomic groups are distinct biological entities and not merely morphological aggregates.
7. Which of the following is the lowest taxonomic category?
Correct Answer: D
Species is the lowest category in the taxonomic hierarchy.
8. Common taxonomic categories include kingdom, phylum, class, order, family, genus and what?
Correct Answer: B
The standard taxonomic hierarchy ends with species as the lowest category.
9. What is the basic requirement for placing an organism into different taxonomic categories?
Correct Answer: C
Classification requires knowledge of characters of organisms to identify similarities and differences.
10. Knowledge of characters helps in identifying similarities and what else among organisms?
Correct Answer: B
Characters help in identifying similarities and dissimilarities among organisms for proper classification.
11. Classification involves:
Correct Answer: C
Classification is not done in one step. It follows a hierarchy of ranks such as kingdom, phylum, class and so on. For example, a dog belongs to species, genus, family, order and higher ranks. Each step forms part of a hierarchy.
12. A taxonomic category is also called:
Correct Answer: B
Each taxonomic category is called a taxon (plural: taxa). For example, species, genus and family are all taxa. These represent different ranks in the classification system.
13. All taxonomic categories together form the:
Correct Answer: B
When all taxonomic ranks like kingdom, phylum, class, order, family, genus and species are arranged together, they form the taxonomic hierarchy. This hierarchy helps organize living organisms step by step.
14. Insects are grouped together because they share:
Correct Answer: B
Insects are recognized by common features like three pairs of jointed legs. For example, ants, butterflies and houseflies all have six legs, which helps us group them under the category 'Insects'.
15. Taxonomic groups are:
Correct Answer: C
Taxonomic groups are real biological entities. For example, mammals are grouped together because they share important features like body hair and mammary glands, not just similar shapes.
16. The lowest taxonomic category in classification is:
Correct Answer: D
Species is the lowest rank in classification. It represents organisms that can interbreed and produce fertile offspring. For example, humans belong to the species Homo sapiens.
17. The correct sequence of taxonomic categories is:
Correct Answer: A
The correct order from higher to lower is Kingdom, Phylum (Division in plants), Class, Order, Family, Genus and Species. Species is the most specific category.
18. Placement of an organism in taxonomic categories requires:
Correct Answer: B
To classify an organism, we must know its characteristics. For example, body structure, cell type and reproductive features help identify similarities and differences and decide its correct taxonomic position.
19. Similarity and dissimilarity among organisms help in:
Correct Answer: C
By comparing similarities and differences among organisms, scientists can group them correctly. For example, animals with backbones are grouped under vertebrates, while those without are invertebrates.