- 1(current)
Q. No.| 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 |
Subtopic: Â Microbes in Biocontrol Agent |
 53%
Level 3: 35%-60%
Hints
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
Subtopic: Â Microbes in Biocontrol Agent |
 79%
Level 2: 60%+
Hints
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 |
Subtopic: Â Chemicals, Enzymes & Other Bioactive Molecules |Â Microbes in Production of Biogas |Â Microbes in Biocontrol Agent |Â Microbes as Biofertilizer |
 92%
Level 1: 80%+
Hints
Match the following columns and select the correct option:-
|
Column-I |
Column-II |
||
|
(a) |
Dragonflies |
(i) |
Biocontrol agents of several plant pathogens |
|
(b) |
Bacillus thuringiensis |
(ii) |
Get rid of mosquitoes |
|
(c) |
Glomus |
(iii) |
Narrow spectrum insecticidal applications |
|
(d) |
Baculoviruses |
(iv) |
Biocontrol agents of lepidopteran plant pests |
|
(v) |
Absorb phosphorus from soil |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (v) | (iv) | (i) |
| 2. | (ii) | (i) | (iii) | (iv) |
| 3. | (ii) | (iii) | (iv) | (v) |
| 4. | (ii) | (iv) | (v) | (iii) |
Subtopic: Â Microbes in Biocontrol Agent |
 74%
Level 2: 60%+
NEET - 2020
Hints
Links
| Assertion (A): | An example of microbial biocontrol agents that can be introduced in order to control butterfly caterpillars is the bacteria Bacillus thuringiensis (often written as Bt). |
| Reason (R): | The development of methods of genetic engineering has helped scientists to introduce B. thuringiensis toxin genes into plants. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Â Microbes in Biocontrol Agent |
 62%
Level 2: 60%+
Hints
Assertion(A): Organic farmers create a system where pests are eradicated within a living and vibrant ecosystem.
Reason(R): A key belief of the organic farmer is that biodiversity furthers health.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): A key belief of the organic farmer is that biodiversity furthers health.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Microbes in Biocontrol Agent |
Level 3: 35%-60%
Hints
- 1(current)
Q. No.
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