Female sex organs of gymnosperms are called:
1. | Archegonia | 2. | Female strobili |
3. | Megasporangium | 4. | Megasporophyll |
Identify the incorrect statement regarding algae:
1. | Algae contain chlorophyll |
2. | Algae are autotrophic |
3. | Body of an alga is composed of pseudoparenchyma and hyphae |
4. | Cell wall of an alga is composed of true cellulose. |
The given diagram shows:
1. Female thallus of Marchantia
2. Male thallus of Marchantia
3. Female thallus of Funaria
4. Male thallus of Funaria
Consider the following two statements:
I: | The spread of living pteridophytes is restricted to narrow geographical regions |
II: | They are the first terrestrial plants to possess vascular tissues |
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. I is false but II is true
Consider the following two statements:
I: | In Selaginella and Salvia, development of zygotes into young embryos takes place within the female gametophyte. |
II: | Selaginella and Salvia are homosporous pteridophytes |
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. I is false but II is true
In gymnosperms, the ovules are:
1. | not enclosed by any ovary wall before and after fertilization |
2. | not enclosed by any ovary wall only before fertilization |
3. | not enclosed by any ovary wall only after fertilization |
4. | enclosed by an ovary wall before and after fertilization |
Coralloid roots in Cycas are associated with nitrogen fixing:
1. | Rhizobium | 2. | Frankia |
3. | Azospirillum | 4. | Cyanobacteria |
All the following regarding Pinus are correct except:
1. Obligate association with mycorrhiza
2. Unbranched stems
3. Male and female strobili on the same plant
4. Leaves in fascicles
Identify the incorrect statement:
1. | As compared to the bryophytes, pteridophytes have sporophyte as the main plant body |
2. | Pteridophyte sporophyte has well differentiated true roots, stem and leaves |
3. | Selaginella has macrophylls like ferns |
4. | In sporophyte of ferns, leaf-like appendages called sporophylls subtend sporangia |
A species of red algae has been discovered near Bahamas at a depth of more than 260 m. This unusual feat is possible because this alga:
1. | lacks pigmentation and functions heterotrophically as parasite on other plants |
2. | has significant amount of phycoerythrin in addition to chlorophyll a and d |
3. | unlike other red algae has flagellated gametes |
4. | it has large number of root like rhizoids enabling it to attach to a deep substratum |