How Do Sieve Tube Member (Stm)cells Differ from Tracheids

question 12

Multiple Choice

How do sieve tube member (stm) cells differ from tracheids?

• A)stm cells occur in angiosperms;tracheids only occur in gymnosperms
• B)stm cells function as living cells;tracheids function as dead cells
• C)stm cells lack a companion cell;tracheids have a companion cell
• D)stm cells have secondary cell walls;tracheids have only a primary cell wall
• E)stm cells are found in vascular rays;tracheids are found only in parenchyma