In this chapter, the following topics are important for long questions in board exams:

1. Species and Speciation

Discuss the meaning of the terms species and speciation. Explain what a species is and how new species are formed. Describe the process of speciation and the factors that lead to it.

2. Three Domains of Life

Describe the classification of organisms into three domains: Archaea, Bacteria, and Eukarya. Explain the characteristic features of each domain and the basis of this classification.

3. Taxonomic Hierarchy in Eukarya

Describe the classification of organisms in the Eukarya domain into the taxonomic hierarchy: Kingdom, Phylum, Class, Order, Family, Genus, and Species. Explain each level with examples.

4. Characteristic Features of Kingdoms

Outline the characteristic features of the five kingdoms:

• Monera (Prokaryotes, bacteria)

• Protoctista (Unicellular eukaryotes)

• Fungi (Multicellular eukaryotes with chitin cell walls, heterotrophic)

• Plantae (Multicellular eukaryotes with cellulose cell walls, autotrophic)

• Animalia (Multicellular eukaryotes, heterotrophic, no cell walls)

Explain the basis of classification for each kingdom.

5. Classification of Viruses

Outline how viruses are classified. Explain why viruses are not included in the five-kingdom system. Describe their characteristics and the basis of their classification.

6. Ecosystem and Niche

Define the terms ecosystem and niche. Explain the difference between an ecosystem and a niche. Give examples of each.

7. Levels of Biodiversity Assessment

Explain the different levels at which biodiversity can be assessed:

• Genetic diversity

• Species diversity

• Ecosystem diversity

Explain each level in detail.

8. Importance of Random Sampling

Explain the importance of random sampling in determining the biodiversity of an area. Describe why random sampling is necessary and how it helps in obtaining accurate data.

9. Methods to Assess Distribution and Abundance

Describe and use suitable methods to assess the distribution and abundance of organisms in an area. Explain techniques such as quadrat sampling, transect sampling, and mark-recapture methods.

10. Importance of Biodiversity and Classification

Explain why biodiversity and classification are fundamental concepts in biology. Discuss how they provide insight into the variety of life forms and their evolutionary relationships.