Q. No.Consider the given two statements:
I. The term ‘archegonium’ is not used for megagametophytes, angiosperms and gnetophytes.
II. The sperms are delivered by means of a pollen tube in these 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 true but II is false
4. Both I and II are false
I. The term ‘archegonium’ is not used for megagametophytes, angiosperms and gnetophytes.
II. The sperms are delivered by means of a pollen tube in these plants.
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. Both I and II are false
Consider the given two statements:
I. Formation of a multicellular haploid gametophyte as in ferns rather than limiting it to a few cells is believed to provide an evolutionary advantage.
II. The transmission of harmful traits is less likely to occur to the future generations.
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 true but II is false
4. Both I and II are false
In contrast to conifers, gnetophytes produce:
1. Simple pollen strobili and simple seed strobili
2. Simple pollen strobili and compound seed strobili
3. Compound pollen strobili and simple seed strobili
4. Compound pollen strobili and compound seed strobili
Rather than having true roots, stems and leaves the members of Phaeophyceae have root like holdfast, stem like stipe and leaf like fronds. What will be true for these structures?
I. Holdfasts are not the primary organs for water and nutrient uptake.
II. In brown algae like Fucus, the tissues in stipe include a central pith, a surrounding cortex and an outer epidermis.
III. Gas filled floats called pnematocysts provide buoyancy in many brown algae.
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
The term ‘seaweeds’ is used to describe several macroscopic, multicellular marine algal species belonging to:
I. Chlorophyceae
II. Phaeophyceae
III. Rhodophyceae
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
What would be true for the structure labeled with letter ‘X’ in the given diagram showing the ultrastructure of Chlamydomanas?
1. It is the region of the chloroplast where circular DNA is present
2. It is associated with the operation of a carbon-concentrating mechanism (CCM)
3. It is the inclusion body with accumulated toxic wastes for elimination
4. It is filled with air and is responsible for buoyancy of the organism
The diagram shows a sorus in section in ferns. What would be the name for A?
1. Annulus
2. Placenta
3. Indusium
4. Stomium
The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Ectocarpus | 4. Polysiphonia |
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The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Ectocarpus | 4. Polysiphonia |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Chlamydomanas | 4. Polysiphonia |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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