📚 CBSE Grade-10 Study Guide Open in the Study Guide single page app →
Home › Science (086) (AI practice)

Science (086) — AI-generated practice question

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

Q1. [3] medium initial-understanding
According to the chapter, why do birds and mammals need a four-chambered heart with complete separation of oxygenated and deoxygenated blood, while amphibians and many reptiles can manage with a three-chambered heart? Connect your answer to their respective energy needs.
Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.