Which of these processes is essential for sexual reproduction but NOT for asexual reproduction?

Which substance is NOT transported by the phloem?

A researcher analyzes fluid extracted from a plant's vascular tissue. The fluid is rich in sugars and other organic compounds. Which type of vascular tissue did the researcher most likely sample?

The phloem fibres of which of the following plant is/are used commercially? I. Jute II. Flax III. Hemp

Select the correct option

The specific arrangement of sieve elements and companion cells in phloem tissue, where a single companion cell is associated with multiple sieve elements, is MOST characteristic of which plant group?

Which of the following statements are true?

I.Uneven thickening of cell well is characteristic of sclerenchyma.

II.Periblem forms the cortex of the stem and the root.

III.Tracheids are the chief water transporting elements in gymnosperms.

IV.Companion cell is devoid of nucleus at maturity.

V.The commercial cork is obtained from Quercus suber.

Which of the following is NOT a characteristic of phloem sieve tubes?

Bast fibres are obtained from?

P-proteins are associated with

What is the main function of phloem fibers?

The 'polymer trapping' model explains phloem loading by suggesting that sucrose is converted into larger molecules in which specific cell type?