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

In cold and foggy areas,the limiting factor for photosynthesis is

The Law of Limiting Factors was proposed by .........

The diagram below shows three plants with identical leaf surface areas. Assuming all other conditions were identical for all three plants,which of the plants would likely photosynthesize slowest,and which fastest?

If the concentration of $CO_2$ in the atmosphere is as high as $400 \ ppm$,then......

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