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. Compare nervous and hormonal mechanisms for control and coordination in animals?
. What are hormones? Write its characteristics? Name the hormones and their function secreted by ovary and testes?
. What is synapse? How the electrical impulse conduct through neuron?
. State how the concentration of auxin stimulates the cell to grow longer on the side of the shoot which is away from light?
. 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.
. Describe chemotropism with example?
. Differentiate between:
a) Exocrine and endocrine glands
b) Tropic and nastic movement
. Write the location. Hormone secreted, their function of following gland?
a) Adrenal gland
d) Thyroid gland
. What is the effect of auxin on growth of tendrils?
. What are the limitation of the energy that can be obtained from the oceans?
. Hydrogen has been used as a rocket fuel. Would you consider it a cleaner fuel than CNG? Why or why not?
. Mention the purpose of blackening the interior of a solar cooker?
. Mention three disadvantages of producing hydroelectricity by constructing the dams?
. State the principle and working of ocean thermal energy conversion plant? Write its conditions?
. Define process of nuclear fission? List the major hazards and limitation of nuclear power generation?
. 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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