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Question 1. Compare nervous and hormonal mechanisms for control and coordination in animals? Question 2. What are hormones? Write its characteristics? Name the hormones and their function secreted by ovary and testes? Question 3. What is synapse? How the electrical impulse conduct through neuron? Question 4. State how the concentration of auxin stimulates the cell to grow longer on the side of the shoot which is away from light? Question 5. What is meant by reflex action? With the help of labelled diagram trace the sequence of events which occur when we touch a hot object. Question 6. Describe chemotropism with example? Question 7. Differentiate between:
a) Exocrine and endocrine glands
b) Tropic and nastic movement Question 8. Write the location. Hormone secreted, their function of following gland?
a) Adrenal gland
d) Thyroid gland
Question 9. What is the effect of auxin on growth of tendrils? Question 10. What are the limitation of the energy that can be obtained from the oceans? Question 11. Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not? Question 12. Mention the purpose of blackening the interior of a solar cooker? Question 13. Mention three disadvantages of producing hydroelectricity by constructing the dams? Question 14. State the principle and working of ocean thermal energy conversion plant? Write its conditions? Question 15. Define process of nuclear fission? List the major hazards and limitation of nuclear power generation? Question 16. State the meaning of the term ‘hot spot’ in the context of earth crust? Write the merits and limitations of the energy obtained from hot spot?
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