68. What is the main goal of the process photosynthesis

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The main goal of photosynthesis is to convert light energy in to usable chemical energy.

Explanation: During photosynthesis, plants trap sunlight and use it in the presence of carbon dioxide and water to produce glucose and oxygen. Photosynthesis provides organic food such as glucose and starch; and oxygen for both plants and animals.

Glucose and oxygen produced in photosynthesis is used by both plants and animals in the process of cellular respiration to produce energy carbon dioxide and water. The equation for photosynthesis is 6CO2+ 6H2O + sunlight --> C6H12O6 + 6O2

The equation for cellular respiration is C6H12O6 + 6O2 --> 6CO2 + 6H2O + Energy.

other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations. the si derived unitsfor these derived quantities are obtained from these equations and the seven si base units.