Multiple choice Which of the following sentences about a pea leaf is/are true? Protoxylem is indistinguishable. Stomata have kidney-shaped guard cells. Bundle sheath is formed of colourless cells. All of the above Reveal answer Fill a bubble to check yourself D Correct answer Explanation Protoxylem is indistinguishable, stomata have kidney-shaped guard cells and bundle sheath is formed of colourless cells in a pea leaf.