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 |
Read the given statements and select the correct option:
A - | Trichoderma is an effective biocontrol agent of several plant pathogens. |
B - | B. thuringiensis is effective against larvae of bollworm. |
1. Both A and B are correct
2. Both A and B are incorrect
3. Only A is correct
4. Only B is correct
Consider the following statement (a-d) each with one or two blanks.
a. All solids that settle during primary treatment of sewage forms____(i)____ and supernatant forms the ____(ii)___.
b. Secondary treatment of sewage is also known as ___(iii)___ treatment.
c. A small part of the activated sludge is pumped back into the aeration tank to serve as the ___(iv)_____.
d. The sewage water is treated till ____(v)_____ is reduced.
Which of the following option given the correct fill ups for the respective blank numbers from (i) to (v) in the statements?
1. (i) Primary sludge (iii) Flocs (v) Do
2. (ii) Effluent (iii) Biological (iv) Inoculum (v) BOD
3. (i) Primary sludge (iii) Flocs ( iv) Inoculm (v) DO
4. (i) Effluent (ii) Primary sludge (iii) Flocs (v) BOD
Consider the following statements:
I: | Statins, used as blood cholesterol-lowering agents, are derived from Monascus purpureus |
II: | Cyclosporin A, derived from Trichoderma, is used as an immunosuppressant |
III: | Baculoviruses, in the genus Nucleopolyhederovirus, are species-specific, broad-spectrum insecticides |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Column-I | Column-II | ||
1. | Rotenone | (i) | Chrysanthemum cinerarifolium |
2. | Nicotine | (ii) | Derris elliptica |
3. | Azadiractin | (iii) | Azadirachta indica |
4. | Pyrethrum and cinerin |
(iv) | Nicotiana tabacum |
Match the items in column "A' and coloum 'B' and choose the correct answer
Column I | Column II |
A. Lady bird | (i) Methano bacterium |
B. Mycorrhiza | (ii) Trichoderma |
C. Biological control | (iii) Aphids |
D. Biogas | (iv) Glomus |
The correct answer is
A | B | C | D | |
(1) | ii | iv | iii | i |
(2) | iii | iv | ii | i |
(3) | iv | i | ii | iii |
(4) | iii | ii | i | iv |