The form and size of algae is highly variable. Which of the following will not be true?
I: | Volvox is a colonial alga. |
II: | Ulothrix and Spirogyra do not form filaments. |
III: | Kelps form massive plants bodies. |
1. Only II | 2. Only III |
3. Both I and II | 4. Both II and III |
Identify the incorrectly matched pair:
Alga | Sexual reproduction | |
I: | Ulothrix | Isogamous; non-flagellated gametes |
II: | Spirogyra | Isogamous; flagellated gametes |
III: | Udorina | Anisogamous |
IV: | Fucus | Oogamous |
1. | Only III | 2. | I, II and III |
3. | Only I and II | 4. | Only III and IV |
I: | Algin is a hydrocolloid derived from brown algae |
II: | Carrageen is a hydrocolloid derived from green algae |
III: | Agar is a complex polysaccharide derived from red algae, Gelidium and Gracilaria |
Which of the following is not an example of an edible alga?
1. | Porphyra | 2. | Laminaria |
3. | Sargassum | 4. | Amanita |
Statement I: | It is single-celled green algae. |
Statement II: | It is used as a food supplement. |
1. | The photosynthetic pigments are located within definite chloroplasts. |
2. | Chloroplasts are discoid in shape in all members of chlorophyceae. |
3. | Most of the members have one or more storage bodies called pyrenoids, which contain proteins besides starch, located in the chloroplasts. |
4. | Some green algae may store food in the form of oil droplets. |
Column I | Column II | |
1. | Main photosynthetic pigment | Chlorophyll a, b |
2. | Cell wall | Inner layer of cellulose and outer layer of pectose |
3. | Stored food | Starch |
4. | Flagellar number and insertion | 2-8. unequal. basal |
I: | Ectocarpus is profusely branched and may reach a height of 100 meters. |
II: | Kelps are simple branched filamentous brown algae. |
I. | Asexual reproduction is by biflagellate zoospores that are pear shaped and have two unequal and laterally attached flagella. |
II. | The gametes are pyriform [pear shaped] and bear two laterally attached flagella. |
1. | Frond | 2. | Stipe |
3. | Holdfast | 4. | Rhizoid |