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

An alga which can be employed as food for human beings:

1. Ulothrix

2. Chlorella

3. Spirogyra

4. Polysiphonia

Development of the zygotes into young embryo takes within the female gametophytes in

1. Adiantum.

2. Selaginella.

3. Riccia.

4. Batrachospermum.

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

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

Study the figure and find out incorrect statement.

1. Contains laminarin or mannitol as reserve food.

2. Life-cycle is diplontic.

3. Union of gamete may take place in water or within the oogonium.

4. Gametes with two apically inserted flagella.

A Prothallus is

1. A structure in pteridophytes formed before the thallus develops

2. A sporophytic free living structure formed in pteridophytes

3. A gametophyte free living structure formed in pteridophytes

4. A primitive structure formed after fertilization in pteridophytes

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

Pinus seeds cannot germinate and establish without fungal association. This is because:

1. its seeds contain inhibitors that prevent germination.

2. its embryo is immature.

3. it has an obligate association with mycorrhizae.

4. it has a very hard seed coat.