Assertion (A): | Most of the orchid species seedlings cannot proceed with development in the absence of symbiotic fungi. |
Reason (R): | Lichens contain symbiotically associated fungi. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are true and (R) is not the correct explanation of (A) |
3. | (A) is true, (R) is false |
4. | (A) is false, (R) is true |
Assertion (A): | Biofertilizers are preferred over chemical fertilizers. |
Reason (R): | Chemical fertilizers are more hazardous to the environment. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are True and (R) is not the correct explanation of (A) |
3. | (A) is True, (R) is False |
4. | (A) is False, (R) is True |
Assertion (A): | While working on Staphylocci, Alexander Fleming observed that Penicillium notatum inhibits the growth of the bacteria. |
Reason (R): | This inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are True and (R) is not the correct explanation of (A) |
3. | (A) is True, (R) is false |
4. | (A) is false, (R) is True |