Male gametes are flagellated in:
1. Polysiphonia
2. Anabaena
3. Ectocarpus
4. Spirogyra

Mannitol is a sugar alcohol. It is as stored food in:

1.  Fucus
2.  Gracillaria
3.  Chara
4.  Porphyra

Mannitol is the stored food in:
1. Chara
2. Porphyra
3. Fucus
4. Gracillaria