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Origin and Evolution of Life and Introduction to Classification

Telangana Open School (TOSS) · Class 12 · Biology

Most important questions from Origin and Evolution of Life and Introduction to Classification for Telangana Open School (TOSS) Class 12 Biology board exam 2026. MCQs, short answer, and long answer questions with marks.

43 questions30 flashcards5 concepts

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43 Questions·
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Sample Questions

1multiple choice
1 marks

What were the first forms of life on Earth?

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Heterotrophs

The earliest life forms were heterotrophs, depending on organic molecules in the environment for nutrition.

2multiple choice
1 marks

Which experiment simulated early Earth conditions to produce organic molecules?

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Miller-Urey experiment

Stanley Miller and Harold Urey conducted an experiment using gases like CH₄, NH₃, H₂, and H₂O with electric discharge to produce amino acids.

3multiple choice
1 marks

What are the building blocks of proteins?

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Amino acids

Amino acids are the monomers that form proteins through peptide bonds.

4multiple choice
1 marks

Which of the following is a vestigial organ in humans?

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Vermiform appendix

The vermiform appendix is a vestigial organ, functional in ancestors but reduced in humans.

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Frequently Asked Questions

What are the important topics in Origin and Evolution of Life and Introduction to Classification for Telangana Open School (TOSS) Class 12 Biology?
Origin and Evolution of Life and Introduction to Classification covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Origin and Evolution of Life and Introduction to Classification — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 43 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Origin and Evolution of Life and Introduction to Classification?
There are 43 practice questions available for Origin and Evolution of Life and Introduction to Classification. These cover multiple question types including MCQs, short answer, and long answer questions.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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