ICSE biology
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Question
(a) Give one significant difference between each of the following:
Absorption spectrum and Action spectrum
Solution
| Absorption Spectrum | Action spectrum |
| A plot (graph) showing absorption of light of different wavelength a pigment is called absorption spectrum. | An action spectrum is a curve showing the effectiveness of different wavelengths of light in photosynthesis. |
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Question
Give one significant difference between each of the following:
Heart Wood and Sap Wood
Solution
| Heart wood | Sap wood |
| Composed of dead cells. | Composed of living cells. |
Question
Give one significant difference between each of the following:
Tranquillizers and Sedatives
Solution
| Tranquillizers | Sedatives |
| Tranquillizers are drugs which bring about mental tranquilty by relieving anxiety and tension without affecting consiousness. | Sedatives are drugs that produce a calming effect, bring about a state of physical or mental comfort accompanied by a reduction or even suspension of mental activity and finally leading to complete suppression of consciousness. |
Question
Give one significant difference between each of the following:
Arteriosclerosis and Atherosclerosis
Solution
| Arteriosclerosis | Atherosclerosis |
| Arteriosclerosis is due to hardening of the arteries due to age and diseases. | Atherosclerosis is due to fat deposits in the blood walls due to diet and lack of metabolism of fat/lipids. |
Question
Give one significant difference between each of the following:
Myogenic heart and Neurogenic heart
Solution
| Myogenic heart | Neurogenic heart |
| In myogenic heart, the cardiac movement is initiated rythmically by cardiac muscle themselves. Found in molluscs and vertebrates. | In neurogenic heart, the cardiac movement is initiated by nerves arising from the brain. The pacemaker is made of nerve ganglion cells found on the dorsal surface of the heart. |
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Mock Test Series
Mock Test Series