Question

Why sieve tubes are the most important element of phloem

Answer 1

The main function of the sieve tube is transport of carbohydrates, primarily sucrose, in the plant (e.g., from the leaves to the fruits and roots). Unlike the water-conducting xylem vessel elements that are dead when mature, sieve elements are living cells. They are unique in lacking a nucleus at maturity.

Answer 2

Answer:

because they transport organic compounds during photosynthesis