1. Classes including fishes, amphibians, reptiles, birds and mammals together form the:
Correct Answer: C
In the taxonomic hierarchy, phylum is a higher category that includes several classes. Classes such as fishes, amphibians, reptiles, birds and mammals are grouped together into a phylum based on common body organisation and characteristics.
2. Animals like fishes, amphibians, reptiles, birds and mammals are placed in the phylum ______ based on the presence of notochord and dorsal hollow neural system.
Correct Answer: B
Fishes, amphibians, reptiles, birds and mammals share common features such as the presence of a notochord and a dorsal hollow nerve cord at some stage of their life cycle. Because of these characteristics, they are all placed in the phylum Chordata.
3. In plants, classes with similar characters are grouped into a higher category called:
Correct Answer: B
In plant taxonomy, the term 'division' is used instead of 'phylum'. Classes of plants that share similar characteristics are grouped together into a higher taxonomic category called division.
4. All animals belonging to different phyla are placed in the kingdom:
Correct Answer: B
In biological classification, kingdom is the highest taxonomic category. All animals that belong to different phyla are grouped together under the kingdom Animalia in the animal classification system.
5. The highest taxonomic category in biological classification is:
Correct Answer: C
In the traditional system of biological classification, kingdom is considered the highest taxonomic category. It includes a large number of organisms that share very general characteristics.
6. Kingdom Plantae includes:
Correct Answer: B
Kingdom Plantae is a major taxonomic category that includes all plants. These plants belong to different divisions but share common plant characteristics such as the ability to perform photosynthesis.
7. All plants are placed in the ______ kingdom.
Correct Answer: C
In biological classification, all plants are grouped under the kingdom Plantae. This kingdom includes plants belonging to different divisions that share common characteristics such as photosynthesis.
8. The two major kingdoms referred to here are:
Correct Answer: B
In basic biological classification, organisms are often grouped into two major kingdoms: the animal kingdom (Animalia) and the plant kingdom (Plantae). These groups include animals and plants respectively.
9. In taxonomic hierarchy, the categories from species to kingdom are arranged in:
Correct Answer: C
In the taxonomic hierarchy, categories are arranged in ascending order starting from species and moving upward to genus, family, order, class, phylum/division, and kingdom. These represent increasingly broader groups of organisms.
10. Why have taxonomists developed sub-categories in taxonomic hierarchy?
Correct Answer: B
Taxonomists have introduced sub-categories within the taxonomic hierarchy to classify organisms more precisely. These additional levels help in the more accurate and scientific placement of different taxa.
11. As we move from species to kingdom in taxonomic hierarchy, the number of common characteristics:
Correct Answer: C
In the taxonomic hierarchy, species is the most specific category where organisms share many common characteristics. As we move to higher categories like genus, family, order, class, phylum, and kingdom, the number of shared characteristics decreases while the diversity of organisms increases.
12. In taxonomy, lower taxa are characterised by:
Correct Answer: B
Lower taxonomic categories such as species and genus include organisms that are closely related. Because of this close relationship, members within these lower taxa share more characteristics compared to organisms in higher taxonomic categories.
13. As the taxonomic category becomes higher, determining relationships with other taxa at the same level becomes:
Correct Answer: C
Higher taxonomic categories such as class, phylum, and kingdom include a very large and diverse group of organisms. Because the organisms share fewer common characteristics, it becomes more difficult to determine their relationships with other taxa at the same level.
14. Why does the problem of classification become more complex at higher taxonomic categories?
Correct Answer: B
At lower taxonomic levels like species and genus, organisms share many common characteristics. However, at higher categories like class, phylum, and kingdom, organisms become more diverse and share fewer characteristics. This makes it harder to determine relationships among taxa, making classification more complex.