Biology
Microscopic organism which passively float on the surface of water is called

Both (a) and (b) both
Phytoplantons
Zooplantones
None to these

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Biology
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

only conifers
only angiosperms
angiosperms and all gymnosperms except conifers
all gymnosperms, except conifers

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