Oogamous sexual reproduction is seen in:
1. | Ulothrix | 2. | Spirogyra |
3. | Udorina | 4. | Fucus |
The bryophyte with most economic importance will be:
1. | peat moss | 2. | liverwort |
3. | hornwort | 4. | Polytrichum |
Which of the following Greek root word means "naked" and hence gives name to plants like cycas and pines?
1. | angeion | 2. | sperm |
3. | gymnos | 4. | gynos |
Sexual reproduction takes place through non flagellated gametes that are similar in size in:
1. | Ulothrix | 2. | Spirogyra |
3. | Volvox | 4. | Fucus |
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 |