Which one of the following statements is wrong?
| 1. | Algin and carrageenan are products of algae |
| 2. | Agar-agar is obtained from Gelidium and Gracilaria |
| 3. | Chlorella and Spirulina are used as space food |
| 4. | Mannitol is stored food in Rhodophyceae |
| List-I | List-II | ||
| (a) | Chlamydomonas | (i) | Moss |
| (b) | Cycas | (ii) | Pteridophyte |
| (c) | Selaginella | (iii) | Alga |
| (d) | Sphagnum | (iv) | Gymnosperm |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iii) | (ii) | (i) | (iv) |
| 4. | (ii) | (iii) | (i) | (iv) |
An alga which can be employed as food for human beings:
1. Ulothrix
2. Chlorella
3. Spirogyra
4. Polysiphonia
Which of the following pairs is of unicellular algae?
1. Gelidium and Gracilaria
2. Anabaena and Volvox
3. Chlorella and Spirulina
4. Laminaria and Sargassum
Which one of the following shows isogamy with non-flagellated gametes?
1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra
| 1. | flagellated and similar in size |
| 2. | flagellated and dissimilar in size |
| 3. | non-flagellated and dissimilar in size |
| 4. | non-flagellated and similar in size |
| 1. | Algae are chlorophyll-bearing, thalloid, autotrophic and largely aquatic (both fresh water and marine) organisms. |
| 2. | Algae are chlorophyll-bearing, having highly differentiated body, autotrophic and exclusively found in fresh water organisms. |
| 3. | Algae are chlorophyll-bearing or parasitic heterotrophic organisms, thalloid and largely marine organisms. |
| 4. | Algae are chlorophyll-lacking, thalloid, autotrophic and largely saprophytic organisms found in both fresh and marine waters. |
| I: | Green algae | 2-8 flagella; equal in length and apical in insertion |
| II: | Brown algae | Food stored as floridean starch |
| III: | Red algae | Pear-shaped gametes bearing two laterally attached flagella |