Define plant biomass.

The iodine solution used to test the presence of starch is prepared by

Fill in the blank with the correct option provided within the bracket.

Iodine turns blue-black on reaction with _____ (glycogen, cholesterol, starch).

A destarched leaf on a potted plant was covered with black (A), white (B), and transparent (C) strips of paper, as shown in the figure. After six hours of exposure to sunlight, the leaf was removed from the plant and tested for starch. Which one of the following will be the correct observation?

Fill in the blank using the words given in the bracket.

Carbon dioxide $+$ Water$\stackrel{\mathrm{x}}{\to }$Glucose $+$ Oxygen.

The 'x' refers to in the above equation is _____.  (sunlight/air)