|
What is ‘Phototropism’? How does it occur in plants? Describe an activity to demonstrate phototropism
|
|
1
|
6491
|
April 1, 2019
|
|
What is ‘hydrotropism’? Describe an experiment to demonstrate ‘hydrotropism”?
|
|
1
|
12467
|
April 1, 2019
|
|
How are oxygen and carbon dioxide transported in human beings?
|
|
1
|
4168
|
April 1, 2019
|
|
What is autonomic nervous system? Name the subsystems in which it is subdivided
|
|
1
|
1317
|
April 1, 2019
|
|
Explain ‘reflex action’ with a suitable example
|
|
1
|
723
|
April 1, 2019
|
|
What is phototropism? Describe an activity to demonstrate phototropism
|
|
1
|
3978
|
April 1, 2019
|
|
What are ‘nastic’ and ‘curvature’ movements? Give one example of each
|
|
1
|
4644
|
April 1, 2019
|
|
With the help of an activity demonstrate geotropism in plants
|
|
0
|
10946
|
March 19, 2018
|
|
What is reflex action? Explain with the help of examples
|
|
0
|
15159
|
March 19, 2018
|
|
Give the various functions performed by the plant hormones
|
|
0
|
11596
|
March 19, 2018
|
|
Describe the central nervous system in human beings
|
|
0
|
5863
|
March 19, 2018
|
|
Which hormone is released into the blood when its sugar level rises?
|
|
0
|
1581
|
March 19, 2018
|
|
What are cranial and spinal nerves? Describe a spinal nerve
|
|
0
|
1880
|
March 19, 2018
|
|
Differentiate between tropic and nastic movements in plants
|
|
0
|
10320
|
March 19, 2018
|
|
Name those parts of the flower which serve the same function as the following do in the animals
|
|
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
|
|
0
|
1080
|
March 18, 2018
|
|
Label the parts (a), (b), (c ) and (d) and show the direction of flow of electrical signals in the figure
|
|
0
|
3517
|
March 18, 2018
|
|
How are the brain and spinal cord protected?
|
|
0
|
12514
|
March 18, 2018
|
|
Nervous and hormonal system together perform the function of control and coordination in human beings. Justify the statement
|
|
0
|
1011
|
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?
|
|
0
|
8141
|
March 18, 2018
|
|
How is the endocrine system able to maintain hormonal concentration in the body?
|
|
0
|
2158
|
March 18, 2018
|
|
How is reflex arc formed?
|
|
0
|
3251
|
March 18, 2018
|
|
Why is pancreas called a ‘dual function’ gland? Write the names of its hormones
|
|
0
|
3920
|
March 18, 2018
|
|
Why do tendrils coil around hard rough objects?
|
|
0
|
2164
|
March 18, 2018
|
|
What is turgor movement?
|
|
0
|
3111
|
March 18, 2018
|
|
How do animal muscles move?
|
|
0
|
6152
|
March 18, 2018
|
|
What are the advantages of the fact that mo reflex actions are governed by spinal cord?
|
|
0
|
2057
|
March 18, 2018
|
|
What is cerebrospinal fluid? What is its function?
|
|
0
|
7424
|
March 18, 2018
|
|
If a ripened fruit is kept in a basket of raw fruits, then what will happen?
|
|
0
|
1800
|
March 18, 2018
|
|
Why are the electrical-chemical signals not an efficient means of communication in plants?
|
|
0
|
2220
|
March 18, 2018
|