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

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

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

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.

By looking at which internal structure of a 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.

By looking at which internal structure of a 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.

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