A substance “P” is necessary for growth and development of organisms, and
it is an indispensable commodity of life.
Shortage of “P” has ill effects on plants and affects the natural process “Q” in
plants leading to shortage of food.
Process “Q” releases “R” and “S” as by products. “R” is used for nutrition
and “S” is used for breathing and respiration.
Identify P,Q, R and S
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Answer:
P - animal
Q - photosynthesis
R - Food
S - Oxygen
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