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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
|
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
|
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
|
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
|
April 1, 2019
|
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Explain ‘reflex action’ with a suitable example
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1
|
724
|
April 1, 2019
|
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What is phototropism? Describe an activity to demonstrate phototropism
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1
|
3988
|
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
|
April 1, 2019
|
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With the help of an activity demonstrate geotropism in plants
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0
|
10984
|
March 19, 2018
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What is reflex action? Explain with the help of examples
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0
|
15172
|
March 19, 2018
|
|
Give the various functions performed by the plant hormones
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0
|
11596
|
March 19, 2018
|
|
Describe the central nervous system in human beings
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0
|
5864
|
March 19, 2018
|
|
Which hormone is released into the blood when its sugar level rises?
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0
|
1581
|
March 19, 2018
|
|
What are cranial and spinal nerves? Describe a spinal nerve
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0
|
1882
|
March 19, 2018
|
|
Differentiate between tropic and nastic movements in plants
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0
|
10441
|
March 19, 2018
|
|
Name those parts of the flower which serve the same function as the following do in the animals
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0
|
812
|
March 19, 2018
|
|
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
|
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
|
3522
|
March 18, 2018
|
|
How are the brain and spinal cord protected?
|
|
0
|
12560
|
March 18, 2018
|
|
Nervous and hormonal system together perform the function of control and coordination in human beings. Justify the statement
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|
0
|
1019
|
March 18, 2018
|
|
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
|
8144
|
March 18, 2018
|
|
How is the endocrine system able to maintain hormonal concentration in the body?
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0
|
2160
|
March 18, 2018
|
|
How is reflex arc formed?
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|
0
|
3253
|
March 18, 2018
|
|
Why is pancreas called a ‘dual function’ gland? Write the names of its hormones
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|
0
|
3936
|
March 18, 2018
|
|
Why do tendrils coil around hard rough objects?
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|
0
|
2168
|
March 18, 2018
|
|
What is turgor movement?
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|
0
|
3112
|
March 18, 2018
|
|
How do animal muscles move?
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|
0
|
6166
|
March 18, 2018
|
|
What are the advantages of the fact that mo reflex actions are governed by spinal cord?
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|
0
|
2059
|
March 18, 2018
|
|
What is cerebrospinal fluid? What is its function?
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|
0
|
7425
|
March 18, 2018
|
|
If a ripened fruit is kept in a basket of raw fruits, then what will happen?
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|
0
|
1801
|
March 18, 2018
|
|
Why are the electrical-chemical signals not an efficient means of communication in plants?
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|
0
|
2222
|
March 18, 2018
|