There are certain seeds that fail to germinate even when external conditions are favourable. Some of the chemical inhibitors present in such seeds can be all of the following except:
1. | Abscisic acids | 2. | Phenolic acid |
3. | Para-ascorbic acid | 4. | Gibberellic acid |
Consider the two statements:
I. Hydroponically grown plants would grow much slower if they were not sufficiently aerated.
II. Oxygen is not soluble in water.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
The ratio of cytokinins to auxin controls cell differentiation in a callus, if:
I. Auxin levels increase shoot buds develop from the callus
II. Cytokinins level increase, roots form
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Consider the given two statements:
I: | Generally, phenotypic plasticity is more important for immobile organisms (e.g. plants) than mobile organisms (e.g. most animals). |
II: | Plants follow different pathways in response to environment or phases of life to form different kinds of structures. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Consider the given two statements:
I. 2,4-D [2,4-Dichlorophenoxyacetic acid] is widely used as a herbicide.
II. 2,4-D acts by mimicking the action of the plant growth hormone auxin, which results in uncontrolled growth and eventually death in susceptible plants.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Match each item in Column I with one in Column II and select the correct match from the codes given:
COLUMN I | COLUMN II | ||
A | Auxins | P | Indole compounds |
B. | Cytokinins | Q | Skoog and Miller |
C. | Gibberellins | R | Terpenes |
D. | Ethylene | S | Cousins |
A | B | C | D | |
1. | P | Q | R | S |
2. | P | R | S | Q |
3. | R | P | Q | S |
4. | R | S | P | Q |
COLUMN I [PGR] |
COLUMN II [Discovered by] |
||
A | Auxin | P | F. W. Went |
B | Gibberellic acid | Q | E. Kurosawa |
C | Kinetin | R | Miller et al. |
D | Ethylene | S | H. H, Cousins |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | P | S | R |
3. | R | S | Q | P |
4. | S | R | P | Q |
Assertion (A): | Growth, at a cellular level, is measured by a variety of parameters such as increase in fresh weight, dry weight, length, area, volume and cell number. |
Reason (R): | Such parameters are more or less proportional to the increase in protoplasm which is primarily responsible for growth at cellular level. |
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. | Both (A) and (R) are False. |
Assertion (A): | Spraying sugarcane crops with gibberellins increase the yield by as much as 20 tonnes per acre. |
Reason (R): | Sugarcane stores carbohydrates such as sugar in their stems. |
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. | Both (A) and (R) are False. |
Assertion (A): | Shoot apices modify themselves into flowering apices prior to lowering. |
Reason (R): | Shoot apices are the sites of perception of light/dark in 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. | Both (A) and (R) are false. |