The mature sieve tube element lacks a nucleus. So its function is controlled by the nucleus of the
Important Questions on Anatomy of Flowering Plants
Identify the figure and select the incorrect statement.
Identify A, B, and C in the following figure of phloem tissue.
Match Column I and Column II.
| Column I | Column II | ||
| a | Tracheid | p | Perforations in end |
| b | Vessels | q | Phloem fibers |
| c | Sieve tube | r | Tapering end |
| d | Bast fibres | s | Callose |
Select the correct statement with respect to phloem fibres.
(a) Generally absent in primary phloem.
(b) Much elongated unbranched with needle-like apices.
(c) Sclerenchymatous in nature.
(d) Becomes dead at maturity.
Read the following statements carefully.
(a) The presence of vessels is a characteristic feature of angiosperms.
(b) Xylem fibers have highly thickened walls and obliterate central lumens.
(c) Xylem parenchyma cells are living and thin walled, and their cell walls are made up of cellulose.
(d) Xylem parenchyma store food material in the form of starch, fat, and other substances such as tannins.
How many statements are correct?
