NCERT Solutions For Class 12 Biology Chapter 13: Organisms and Population

NCERT Solutions for Class 12 Biology Chapter 13 Organisms and Population are provided in this article. This Chapter 13 comes under Unit X- Ecology and Environment. The article will provide all the important definitions, concepts, and methodologies that will be really beneficial for the students appearing for CBSE Class 12 Exam 2022-23. The important topics that are included in this chapter are:

• Population
• Population interactions
• Mutualism
• Topics excluded: Organism and its Environment, Major Abiotic Factors, Responses to Abiotic Factors, Adaptations

Expected no. of Questions: 1-2 questions of around 3 marks.

Download PDF: NCERT Solutions for Class 12 Biology Chapter 13 Organisms and Populations

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NCERT Solutions for Class 12 Biology Chapter 13

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Class 12 Biology Chapter 13 Organisms and Populations: Important Topics

The branch of biology involving the study of the interactions that take place between an organism and its environment is known as ecology. Any biological organization consists of 4 levels which are as Organisms, Populations, Biomes, and Communities. Let us know more about the first two levels that are- Organisms, and Populations. 

• Organisms

An organism can be defined as a contiguous living system that lives in an environment and has the ability to adapt and retain certain structures and behaviour. For instance, fungi, bacteria, plants, animals, and humans. An organism collectively forms a population. 

• Populations

The population is referred to as a group of individuals or organisms of any species living in a well–defined geographical area, at a specific time with the capability of interbreeding. For example, the population of deer in a forest.

• Population Interactions

Population interactions are referred to as the interaction between different populations. There are various modes of population interactions. These include:

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