11. Which type of thickening is found in protoxylem.
12. Sieve tuabe is characterized by
A. Presence of lignin
B. Absence of Cytoplasm
C. Presence of Pectin
D. Absence of Nuclens
Answer : Option D
13. Which of the following element of xylem is living.
14. Safranin stains
A. Thick walled cells
B. Lignified cells
C. Suberized cells
D. Living cells
Answer : Option B
16. Which of the following is a food systhesising tissue.
17. Cucurbita stem shows
A. Radial Vascular bundle
B. Collateral Vscular bundle
C. Conjoint Vascular bundle
D. Bicollateral Vacular bundle
Answer : Option D
18. In monocot leaves, the mesophyll Consists of
A. Aerenchyma
B. Only Spongy chlo renchy ma
C. Only Pallisade
D. Pallisade and Spongy Chloren chyna
Answer : Option B
19. In stem,the xylem shows.
A. Tetrach arrangement
B. Endarch development
C. Polyarch arrangement
D. Exarch development
Answer : Option A
20. In monocot stem the vaschlar bundles are
A. Arranged in a ring
B. Arranged alternatively
C. Present inside endodermis
D. Scattered in ground tissue
Answer : Option D