Class 11 Biology - ODISHA
The Living World
The Living World is the opening chapter of Class 11 Biology for Odisha BSE students, introducing the fundamental characteristics that distinguish living organisms from non-living matter. It explores the concepts of growth, reproduction, metabolism, and consciousness as defining properties of life. The chapter also emphasizes biodiversity, the need for classification, and the principles of taxonomy and binomial nomenclature established by Carl Linnaeus. Understanding this chapter is crucial as it lays the foundation for all subsequent biological studies and consistently appears in board examinations through short-answer questions and definitions.
Start Learning FreeKey Concepts
Defining Properties of Life
Metabolism and cellular organization are the only defining properties of living organisms, whereas growth and reproduction are not defining because they are not universal.
Biodiversity
The immense variety of living organisms existing on Earth, ranging from microscopic bacteria to huge blue whales, estimated to be 1.7-1.8 million species.
Taxonomy
The branch of science that deals with the identification, nomenclature, and classification of organisms based on their characteristics and evolutionary relationships.
Binomial Nomenclature
A universal system of naming organisms using two components proposed by Carl Linnaeus: the generic name (Genus) and the specific epithet (Species).
Taxonomic Hierarchy
The arrangement of various taxonomic categories in a descending order, starting from Kingdom down to Species, reflecting evolutionary relationships.
Important Formulas
Board Exam Info
In the Odisha (BSE) Class 11 Biology exams, this chapter typically carries around 3 to 5 marks. Questions are usually direct and include short-answer questions, defining terms like metabolism or nomenclature, and differentiating between defining and non-defining properties of life.
Frequently Asked Questions
Why is growth not considered a defining property of living organisms?
Because non-living objects like mountains, boulders, and sand mounds also grow by the accumulation of material on their surface, a process known as accretion.
Who proposed the system of Binomial Nomenclature?
Carolus Linnaeus proposed the system of Binomial Nomenclature in his book Species Plantarum.
What is the highest and lowest category in the taxonomic hierarchy?
Kingdom is the highest category and Species is the basic and lowest category in the taxonomic hierarchy.
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