Question

what is alternative of sieve tube in gymnosperm

Answer 1

Sieve cells are very uniform and have an even distribution across of sieve areas. Their narrow pores are necessary in their function in most seedless vascular plants and gymnosperms which lack sieve-tube members and only have sieve cells to transport molecules.

Answer 2

Answer:

Sieve cells are very uniform and have an even distribution across of sieve areas. Their narrow pores are necessary in their function in most seedless vascular plants and gymnosperms which lack sieve-tube members and only have sieve cells to transport molecules.