11.
Out of 900 reported species of living gymnosperms, conifers are represented by about 500 species, About 2,50,000 species of angiosperms (flowering plants) have also been reported in the world. The vast and dominant woodlands in Europe, Asia, North America and mountains such as Himalayas are wooded with

12.
One of the following is not a function of bones.

13.
Plants absorb most part of water needed by them through their

14.
Photo-oxidation is

15.
Process of cell division can take place by