Which one of the following is heterosporous?

(1) Dryopteris

(2) Salvinia

(3) Adiantum

(4) Equisetum

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?

(1) Types of pigments present in the cell

(2) Nature of stored food materials in the cell

(3) Structural organisation of thallus

(4) Chemical composition of the cell wall

In a moss, the sporophyte:

(1) is partially parasitic on the gametophyte

(2) produces gametes that give rise to the gametophyte

(3) arises from a spore produced from the gametophyte

(4) manufactures food for itself, as well as for the gametophyte

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

Male gametes are flagellated in

1. Polysiphonia

2. Anabaena

3. Ectocarpus

4. Spirogyra

The most primitive among the living vascular plants are the

(1) ferns

(2) brown algae

(3) mosses

(4) cycads

Chlorophyll present in red algae is

Algae are useful because they

(1) are large in number

(2) are used in alcoholic fermentation

(3) purify the atmosphere

(4) are used in curdling of milk

The plant body of moss (funaria) is

(1) completely sporophyte

(2) predominatly sporophyte with gametophyte

(3) completely gametophyte

(4) predominantly gametophyte with sporophyte

Mossess and ferns are found in moist and shady places because both

(1) require presence of water for fertilization

(2) do not need sunlight for photosynthesis

(3) depend for their nutrition on microorganisms which can survive only at low temperature

(4) cannot compete with sun-loving plants