12th Standard Syllabus & Materials
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Published on: 13/05/2022
QB365 provides detailed and simple solution for every book back questions in class 12 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Differentiate between Eurytherms and Stenotherms.
2.
What is soil permeability?
3.
Define ecological niche.
4.
What is a Habitat?
5.
Explain hibernation and aestivation with examples.
1.
| Stenohaline Animals | Euryhaline Animals |
|---|---|
| The animals which show tolerance only to a narrow range of salinities. | The animals which, can tolerate a wide range of salinities |
| Their distributional range is limited. |
Their distribution shows a wide range |
2.
1. The characteristic of soil that determines the movement of water through pore spaces is known as soil permeability.
2. Soil permeability is directly dependent on the pore size. Water holding capacity of the soil is inversely dependent on soil porosity.
3.
Ecological niche is a term for the position of a species within an ecosystem, describing both the range of conditions necessary for persistence of species, and is ecological role in the ecosystem.
4.
The natural home (or) environment of an animal, plant or other organism or it can be considered as the address of an organism
5.
Hibernation:
Spending the winter in an inactive dormant state to escape in time, is called hibernation. E.g: Bears and Frogs.
Aestivation:
Spending the dry, hot period in an inactive state to escape in time is called aestivation .E.g: Snails and Fish.
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Tamilnadu Stateboard 12th Standard Subjects
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Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
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Computer Science
Business Maths and Statistics
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