By looking at a plant externally can you tell whether a plant is `C_(3)` or `C_(4)` ? Why and how ?

By looking at which internal structural of plant, can you tell whether a plant is C_(3) or C_(4) ? Explain.

By looking at which internal structure of a plant can you tell whether a plant is C_(3) or C_(4) ? Explain.

How do plants respond to external stimuli ?

Compared to C_(3) plants, C_(4) plants

Secondary acceptor of CO_(2) in C_(4) plants is

Name the primary CO_(2) acceptor in C_(4) plants.

What are C_(3) Plants ?

Carbon dioxide acceptor in C_4 plants is

C_(4) plants can absorbs CO_(2) from