Question

If there is no shortage of water available to a plant, what is the approximate conversion of sun light energy into biomass assuming that light levels are near but not dramatically exceeding the light saturation intensity? Why?

a. less than 1%

b. 5%

c. 10%

d. 27%

e. 90%

Answer 1

a. less than 1%

plants can not absorbs the whole sunlight. It is lost due to variuos reasons like-

now, as chrolophyll can absorb only the light in the range of photons between 400 and 700 nm. So light which is outside in the range of 400 and 700 nm are lost.

some of the absorbed photons get degraded.

some are lost due to incompete absorbance.

some are lost due to respiration

some is lost during conversion of glucose

at the end plant can use only 3-6 % of sunlight which is incoming.