Antheridium of bryophytes produce _______ antherozoids.
1. | Non-motile | 2. | Uni-flagellate |
3. | Biflagellate | 4. | Ciliate |
Identify the incorrect statement regarding green algae:
1. Major pigments are chlorophyll a and b
2. Stored food is floridean starch
3. Cellulosic cell wall
4. 2-8, equal and apical flagellar insertions
How many of the given features will be true for brown algae:
I. Presence of xanthophylls
II. A gelatinous coating of algin on cell wall
III. A centrally placed vacuole in plastids
IV. Ribbon shaped biflagellate zoospores
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Artificial systems of classification give equal weightage to vegetative and sexual characteristics which is not acceptable because:
1. Only the sexually characters are genetically determined
2. Vegetative characters are more easily affected by environment
3. Sexual characters are not easily observable in living beings
4. Vegetative reproduction is equally common as sexual reproduction
Which of the following is not an example of red algae?
1. Polysiphonia
2. Porphyra
3. Gracilaria
4. Laminaria
What is the function of the gemmae produced by some liverworts?
1. a water gathering structure
2. a light gathering structure
3. a sexual structure
4. an asexual structure
The life cycle of Ectocarpus, Polysiphonia and kelps is:
1.Diplontic
2.Haplontic
3.Aplantic
4.Haplo-diplontic
Bryophytes are attached to the substratum by rhizoids that are:
1. | Unicellular | 2. | Multicellular |
3. | Acellular | 4. | Unicellular or multicellular |
Sexual reproduction takes place through flagellated gametes that are similar in size in:
1. Ulothrix
2. Spirogyra
3. Volvox
4. Fucus
Ecologically important first colonizers of rocks are:
1. | Lichens | 2. | Algae |
3. | Gymnosperms | 4. | Angiosperms |