Green plants are grown in an aquarium for the purpose of:

How many plants in the given list can produce $3C$ compound after carboxylation of $\text{RuBP}$? Pineapple,Maize,Rice,Mustard,Sorghum,Opuntia,Tomato,Wheat.

Which of the following statements with regard to photosynthesis is/are correct?
$I$. In $C_{4}$-plants,the primary $CO_{2}$ acceptor is $PEP$.
$II$. In the photosynthetic process,$PS-II$ absorbs energy at or just below $680 \;nm$.
$III$. The pigment that is present in the Pigment System-$I$ is $P680$.

If the photosynthetic yield in blue wavelength is $10$ units and that in red wavelength is $40$ units, what should be the yield of photosynthesis in a combination of the two wavelengths, if the effect is synergistic (in $units$)?

Which of the following products of Hill's reaction are used in Blackman's reaction?

Give differences between:
$(1)$ Grana and Stroma
$(2)$ $PS-I$ and $PS-II$