Maximum photosynthesis occurs by ..........

Sugars extracted from sugarcane and sugar beet differ in:

According to one estimate,how many $kg$ of carbon is fixed in the biosphere through photosynthesis annually?

Oxygen is $not$ produced during photosynthesis by

McAlister and Mayer have studied the Warburg effect on which of the following plants?

Select the correct option:
$(1)$ Julius von Sachs / $T$. $W$. Engelmann proved with evidence that glucose is produced when plants grow.
$(2)$ In $PS-II$,maximum light absorption occurs at a wavelength of $680 \, nm / 800 \, nm$.