Xylem and Phloem

Question 1

What is the xylem responsible for transporting?

Answer 1

Water and mineral ions

Question 2

What is responsible for waterproofing the cells?

Answer 2

Lignin

Question 3

What are the properties of lignin?

Answer 3

-Strengthens the walls mechanically.
-Deposited in a spiral, annular or reticulate pattern, allowing xylem to stretch as plant grows and allows stem/branch to bend.

Question 4

What pull does the xylem have and why?

Answer 4

A transpiration pull as it’s responsible for transporting water + mineral ions up the plant.

Question 5

What are the non-lignified pits and what are they responsible for?

Answer 5

Regions where end cell wall has been lost. This allows H20 + mineral ions to leave xylem.

Question 6

What is the xylem parechyma?

Answer 6

Acts as a food + water store.

Question 7

Features of the xylem?

Answer 7

Part of the vascular bundle, transports water + mineral ions, doesn’t transport in both directions, has lignin in the cell walls