Question

Choose the correct statements:

I. Phellogen made up of narrow thin-walled rectangular cells
II. Soft bark is formed early in the season
III. More xylem vessels with narrow lumen are called late wood
IV. In isobilateral leaf, mesophyll is differentiated

• A. I and II
• B. II and III
• C. III and IV
• D. I and IV

Hint:

Late wood has fewer, narrower vessels. Differentiated mesophyll is found in dorsiventral leaves, not isobilateral ones.

Answer 1

The Correct Option is A

I. True — Phellogen is a secondary meristem with thin-walled rectangular cells.
II. True — Soft bark is early periderm formed during early growing season.
III. False — Late wood has fewer vessels with narrow lumens (not more).
IV. False — Isobilateral leaves have undifferentiated mesophyll. 
Only I and II are correct.