All the energy for living organisms comes as radiation in the form of......from the sun and is captured by.......

Photosynthesis takes place in:

Which of the following statements is correct regarding $C_4$ plants?

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 $P680$.

Which of the following plants can show the $CAM$ cycle?

$A$ : Most of the photosynthesis takes place in the blue and red regions of the spectrum.
$R$ : Action spectrum shows the amount of energy of different wavelengths of light absorbed by pigments.