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What is ‘Phototropism’? How does it occur in plants? Describe an activity to demonstrate phototropism
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1
|
6272
|
April 1, 2019
|
|
What is ‘hydrotropism’? Describe an experiment to demonstrate ‘hydrotropism”?
|
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1
|
12303
|
April 1, 2019
|
|
How are oxygen and carbon dioxide transported in human beings?
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1
|
4111
|
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
|
1245
|
April 1, 2019
|
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Explain ‘reflex action’ with a suitable example
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1
|
683
|
April 1, 2019
|
|
What is phototropism? Describe an activity to demonstrate phototropism
|
|
1
|
3845
|
April 1, 2019
|
|
What are ‘nastic’ and ‘curvature’ movements? Give one example of each
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|
1
|
4573
|
April 1, 2019
|
|
With the help of an activity demonstrate geotropism in plants
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0
|
10665
|
March 19, 2018
|
|
What is reflex action? Explain with the help of examples
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|
0
|
15040
|
March 19, 2018
|
|
Give the various functions performed by the plant hormones
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0
|
11538
|
March 19, 2018
|
|
Describe the central nervous system in human beings
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|
0
|
5776
|
March 19, 2018
|
|
Which hormone is released into the blood when its sugar level rises?
|
|
0
|
1540
|
March 19, 2018
|
|
What are cranial and spinal nerves? Describe a spinal nerve
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|
0
|
1828
|
March 19, 2018
|
|
Differentiate between tropic and nastic movements in plants
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|
0
|
9626
|
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
|
754
|
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
|
1031
|
March 18, 2018
|
|
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
|
3436
|
March 18, 2018
|
|
How are the brain and spinal cord protected?
|
|
0
|
12298
|
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
|
969
|
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
|
8012
|
March 18, 2018
|
|
How is the endocrine system able to maintain hormonal concentration in the body?
|
|
0
|
2094
|
March 18, 2018
|
|
How is reflex arc formed?
|
|
0
|
3207
|
March 18, 2018
|
|
Why is pancreas called a ‘dual function’ gland? Write the names of its hormones
|
|
0
|
3801
|
March 18, 2018
|
|
Why do tendrils coil around hard rough objects?
|
|
0
|
2094
|
March 18, 2018
|
|
What is turgor movement?
|
|
0
|
3064
|
March 18, 2018
|
|
How do animal muscles move?
|
|
0
|
5824
|
March 18, 2018
|
|
What are the advantages of the fact that mo reflex actions are governed by spinal cord?
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|
0
|
1900
|
March 18, 2018
|
|
What is cerebrospinal fluid? What is its function?
|
|
0
|
7381
|
March 18, 2018
|
|
If a ripened fruit is kept in a basket of raw fruits, then what will happen?
|
|
0
|
1727
|
March 18, 2018
|
|
Why are the electrical-chemical signals not an efficient means of communication in plants?
|
|
0
|
2160
|
March 18, 2018
|