The green alga rich in proteins used as food supplements even by space travelers is

1. Chlorella
2. Scendesmus
3. Porphyra
4. Carrageen 

Roots of higher plants show symbiosis with mycorrhiizas for obtaining

The world's tallest (angiosperm) flowering tree is

(1) Sequoia

(2) Eucalyptus

(3) Pinus

(4) Cedrus

The wood of Pinus is

(1) manoxylic

(2) polyxylic

(3) pycnoxylic

(4) manoxylic and pycnoxylic

Porous wood has abundance of

Algae are useful because they

The plant body of moss (funaria) is

(1) completely sporophyte

(2) predominatly sporophyte with gametophyte

(3) completely gametophyte

(4) predominantly gametophyte with sporophyte

Megasporophyll of Cycas has the same nature as

The plant part which consists of two generations, one within the other, is

1. germinated pollen grain

2. embryo

3. unfertilized ovule

4. seed

In Ulothrix meiosis takes place in