Question

carried out in hydra?
3. What is the green revolution?
4. What does FCI stand for?
5. Why is reproduction considered the most important characteristics of life?
6. What do you understand by bi parebtal reproduction?
7. Why do acne or pimples common among adolescents?
8. Name the hormones which are released during frightened people.
9. Where fertilisation of ovum with sperm takes place.
10. Name the star after the sun which is nearest to earth.
Short q/ans:-
1. List the characteristics which are responsible for the existence of life on earth.
2. How is the pole star located in the sky? explain with diagram.
3. Why are endocrine glands known as ductless glands?
4. Why do tadpoles growing in iodine deficient water fail to grow into frogs?
5. Why do we say that the earthworm is a hermaphrodite animal?
6. How is a hen's egg able to survive in the harsh external environment?
7. Why does a child possess mixed characteristics of both the parents?
8. What are the benefits of ploughing and tilling?
9. What is water logging ? How does it affect the growth of plants?
10. List any three changes that take place during the transformation of a tadpole to a frog.​

Answer 1

Your answer is

Green revolution, great increase in production of food grains (especially wheat and rice) that resulted in large part from the introduction into developing countries of new, high-yielding varieties, beginning in the mid-20th century. Its early dramatic successes were in Mexico and the Indian subcontinent.

Explanation:

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