Plants absorb dissolved nitrates from soil and convert them into

Plants absorb dissolved nitrates from soil and convert them into

A. free nitrogen
B. urea
C. ammonia
D. proteins

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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

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A. all gymnosperms, except conifers
B. only angiosperms
C. only conifers
D. angiosperms and all gymnosperms except conifers

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12.

One of the following is not a function of bones.

A. Place for muscle attachment
B. Protection of vital organs
C. Secretion of hormones for calcium regulation in blood and bones
D. Production of blood corpuscles