Fusion of two gametes which are dissimilar in size is termed as
| 1. | Oogamy | 2. | Isogamy | 
| 3. | Anisogamy | 4. | Zoogamy | 
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 |