Which of the following is the first stable product in the $C_3$ and $C_4$ cycle of photosynthesis,respectively?

The first stable product of the Calvin cycle and the Hatch-Slack cycle are ......... respectively.

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

Blackman demonstrated that increasing illumination increased the photosynthetic rate up to a point when $CO_2$ becomes limiting. If light was not limiting,temperature becomes limiting. Emerson found that maximum $CO_2$ fixation could be achieved with brief flashes of light. Mark the correct statement in the following:

Match the following columns:

Column-$I$	Column-$II$
$(A)$ $P_{680}$	$(I)$ Reaction centre of $PS-I$
$(B)$ $P_{700}$	$(II)$ Reaction centre of $PS-II$
$(C)$ $\text{LHC}$	$(III)$ Antennae
$(D)$ Plastoquinone	$(IV)$ Mobile carrier

The plant $Cuscuta$ shows maximum photosynthesis in