The percentage of light energy utilized for photosynthesis by higher plants is

Thick cuticle on leaves is typical of plants growing in

$A$ plants have a higher temperature optimum than the plants adapted to $B$ climate. Here $A$ and $B$ refer to:

Select the incorrect option regarding the effect of temperature on photosynthesis.

Assertion $:$ Except for plants in shade or in dense forests,light is rarely a limiting factor in nature.
Reason $: C_4$ plants respond to high light intensities.

Of the several gases in the atmosphere,plant life mostly depends upon