What is ‘Phototropism’? How does it occur in plants? Describe an activity to demonstrate phototropism
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1
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6517
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April 1, 2019
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What is ‘hydrotropism’? Describe an experiment to demonstrate ‘hydrotropism”?
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1
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12478
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April 1, 2019
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How are oxygen and carbon dioxide transported in human beings?
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1
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4186
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April 1, 2019
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What is autonomic nervous system? Name the subsystems in which it is subdivided
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1
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1321
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April 1, 2019
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Explain ‘reflex action’ with a suitable example
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1
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724
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April 1, 2019
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What is phototropism? Describe an activity to demonstrate phototropism
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1
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3988
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April 1, 2019
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What are ‘nastic’ and ‘curvature’ movements? Give one example of each
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1
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4646
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April 1, 2019
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With the help of an activity demonstrate geotropism in plants
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0
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10984
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March 19, 2018
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What is reflex action? Explain with the help of examples
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0
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15172
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March 19, 2018
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Give the various functions performed by the plant hormones
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0
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11596
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March 19, 2018
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Describe the central nervous system in human beings
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0
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5864
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March 19, 2018
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Which hormone is released into the blood when its sugar level rises?
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0
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1581
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March 19, 2018
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What are cranial and spinal nerves? Describe a spinal nerve
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0
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1882
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March 19, 2018
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Differentiate between tropic and nastic movements in plants
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0
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10441
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March 19, 2018
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Name those parts of the flower which serve the same function as the following do in the animals
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0
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812
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March 19, 2018
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Name those parts of the flower which serve the same function as the following do in the animals: (i) Testis (ii) Ovary (Hi) Eggs (iv) Sperms
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0
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1081
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March 18, 2018
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Label the parts (a), (b), (c ) and (d) and show the direction of flow of electrical signals in the figure
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0
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3522
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March 18, 2018
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How are the brain and spinal cord protected?
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0
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12560
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March 18, 2018
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Nervous and hormonal system together perform the function of control and coordination in human beings. Justify the statement
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0
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1019
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March 18, 2018
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Define ‘nerve impulse’. Which structure in a neuron helps to conduct a nerve impulse (i) towards the cell body? (ii) away from the cell body?
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0
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8144
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March 18, 2018
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How is the endocrine system able to maintain hormonal concentration in the body?
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0
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2160
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March 18, 2018
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How is reflex arc formed?
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0
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3253
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March 18, 2018
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Why is pancreas called a ‘dual function’ gland? Write the names of its hormones
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0
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3936
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March 18, 2018
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Why do tendrils coil around hard rough objects?
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0
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2168
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March 18, 2018
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What is turgor movement?
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0
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3112
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March 18, 2018
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How do animal muscles move?
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0
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6166
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March 18, 2018
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What are the advantages of the fact that mo reflex actions are governed by spinal cord?
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0
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2059
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March 18, 2018
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What is cerebrospinal fluid? What is its function?
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0
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7425
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March 18, 2018
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If a ripened fruit is kept in a basket of raw fruits, then what will happen?
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0
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1801
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March 18, 2018
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Why are the electrical-chemical signals not an efficient means of communication in plants?
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0
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2222
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March 18, 2018
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