Question

In Kranz Anatomy, bundle sheath cells have

• A. thick walls, no intercellular spaces, and a large number of chloroplasts
• B. thick walls, no intercellular spaces, and no chloroplasts
• C. thin walls, many intercellular spaces, and a large number of chloroplasts
• D. thin walls, many intercellular spaces, and no chloroplasts

Answer 1

The correct option is A thick walls, no intercellular spaces, and a large number of chloroplasts

$C_4$ plants have a special kind of anatomy called Kranz anatomy, in which the bundle sheath cells form several layers around the vascular bundles and are characterized by thick walls, no intercellular spaces, and a large number of chloroplasts. The thick walls and no intercellular spaces between the bundle sheath cells prevent the entry of oxygen and the escape of $C{O}_2$. The figure below shows Kranz anatomy.