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Class 4th Science work ch 3 to 7
Ch 3 Reproduction in animals Keywords 1. Mammals: Animals that give milk and give birth to young ones 2. Reptiles : Animals that lay eggs and crawl on the ground 3. Moulting : removing old skin 4. Metamorphosis : the process of transformation from an immature state to an adult. Answer the following questions Q1. What is reproduction? Ans. A process in which species produce of their own kind. Q2. Why do animals reproduce? Ans. Animals reproduce to maintain their continuity. Q3. What helps an embryo to nourish inside a birds egg? Ans. Yolk nourish embryo inside the egg. Q4. Why do birds sit on their eggs? Ans. They sit on their eggs to provide warmth to the egg. Q6.How do mammals take care of their young ones? 1. They feed their young ones with milk 2. They protect them from enemies. 3. They help them to find food 4. They teach them to live their own 5. Males hunt for food Q7. What are the different stages of development in a frog? Name th...
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