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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] straightforward exam-ready
Which of the following correctly explains why variations are important for a species? ((A)) Variations allow individuals to acquire new skills during their lifetime ((B)) Variations increase the chances that at least some individuals will survive drastic environmental changes ((C)) Variations ensure all offspring are identical, maintaining species stability ((D)) Variations arise only in sexually reproducing organisms and are always beneficial
  1. A Variations ensure all individuals look identical
  2. B Variations allow some individuals to survive environmental changes better than others
  3. C Variations are produced only during asexual reproduction
  4. D Variations reduce the number of offspring produced
Generated by claude-sonnet-4-6 · 2026-06-26 01:02 · grounding rag
Model Answer

Answer: (B) Variations increase the chances that at least some individuals will survive drastic environmental changes.

Explanation

The passage clearly states that if some variations are present in a population, there is a chance for some individuals to survive when a niche is drastically altered (e.g., heat-resistant bacteria surviving global warming). Options A, C, and D are factually incorrect as per the textbook — variations do not make offspring identical, they occur in both sexual and asexual reproduction, and they do not reduce offspring numbers.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.