9th Class Biology – Short Questions & Answers
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Name the three parts of the cell theory.
The three parts of the cell theory are: 1. All living organisms are made up of cells. 2. The cell is the basic unit of structure and function in living organisms. 3. All cells arise from pre-existing cells.
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What is the function of the nucleus?
The nucleus contains the cells genetic material (DNA) and controls cellular activities such as growth, metabolism, and reproduction.
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Define binomial nomenclature.
Binomial nomenclature is the system of giving organisms a two-part Latin name, one for the genus and one for the species.
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Define biology.
Biology is the scientific study of living organisms and their interactions with each other and their environments.
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Who proposed the five-kingdom classification system?
The five-kingdom classification system was proposed by Robert Whittaker in 1969.
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Name any two branches of biology.
Two branches of biology are Botany (study of plants) and Zoology (study of animals).
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What is the significance of biodiversity?
Biodiversity is important for maintaining ecosystem balance, providing resources for food, medicine, and materials, and supporting ecosystem services like pollination and climate regulation.
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What is the scientific method?
The scientific method is a systematic approach to research that involves observing, hypothesizing, experimenting, and analyzing data to reach conclusions.
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Differentiate between prokaryotes and eukaryotes.
Prokaryotes are unicellular organisms without a defined nucleus (e.g., bacteria), while eukaryotes are organisms whose cells have a defined nucleus and membrane-bound organelles (e.g., plants, animals).
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Differentiate between a theory and a law.
A theory is a well-tested explanation for a broad range of phenomena, while a law is a statement based on repeated experimental observations that describes some aspect of the universe.
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