15213.Sexual reproduction in Spirogyra is an advanced feature because it shows:
Morphologically different sex organs
Same size of motile sex organs
Different size of motile sex organs
Physiologically differentiated sex organs
15214.Algae have cell wall made up of
Hemicellulose, pectins and proteins
Cellulose, galactans and mannans
Cellulose, hemicellulose and pectins
Pectins, cellulose and proteins
15219.Transgenic plants are the ones
Grown in artificial medium after hybridization in the field
Produced by a somatic embryo in artificial medium
Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell
Produced after protoplast fusion in artificial medium
15220.Algae having oil as reserve food belongs to
Xanthophyceae
Rhodophyceae
Chlorophyceae
Phaeophyceae
15227.Which of the following is haploid in the life-cycle of Funaria?
Embryo
Peristome teeth
Protonema
Sporophyte
15228.Pyrenoids are characteristically found in the chloroplasts of
Angiosperms
Pteridophytes
Fungi
Algae
15229.In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result:
There is high degree of sterility
There is no change in success rate of fertilization
Self fertilization is prevented
One can conclude that the plant is apomictic
15231.Pyrenoids are made of
proteinaceous centre and starchy sheath
core of protein surrounded by fatty sheath
core of starch surrounded by sheath of protein
core of nucleic acid surrounded by protein sheath