Light is sn important element in the growth of a plant.
Explanation:
Light is an important factor influencing plant growth. It is a common observation that plants grow towards light. Charles Darwin and his son Francis Darwin first observed that the coleoptiles of canary grass responded to unilateral illumination by growing towards the light source (phototropism). After a series of experiments, it was concluded that the tip of coleoptile was the site of transmittable influence that caused the bending of the entire coleoptile due to more growth on the dark side. That transmittable influence is now thought to be the phytohormone called auxin.
END of the answer.
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The cost of energy to heat water to make steam is not a
negative environmental effect of using high pressure water hoses on rocky
coastlines to clean the spilled oil. Spilled oil cause environmental pollution
to the coastlines and endangers the species the lives of the species living in
these coastlines.
