Narrow fluid filled channels that cross cell walls --> cytoplasm that is continuous from one cell to the next.
1 of 11
What cell walls permeable to?
Water and solutes.
2 of 11
What is a pit?
Place in the cell wall where the wall is thin--> only the first layer of cellulose is deposited.
3 of 11
Where is can the plasmodesmata be located and why?
It is located in pits to help the movement of substances between the cells.
4 of 11
What are xylem vessels needed for?
These are tubes that transport water and minerals (up through the stem), and their stiffened cell walls help support the plant.
5 of 11
What are sclerenchyma fibres?
Columns of these cells with their stiffened cell walls also provide support.
6 of 11
What are phloem sieve tube cells?
These form long tubes which transport organic solutes, such as sugars and amino acids (up and down the plant). They so not have a role in supporting the plant upright.
7 of 11
What is a dicotyledon?
A flowering plant with an embryo that bears two cotyledons (seed leaves).
8 of 11
How are xylem vessels formed?
Xylem vessels are formed via autolysis, this leaves behind dead empty cells that form a tube, end walls between cells are lost so that the flow of water and minerals is easy.
9 of 11
What is autolysis?
The break down of the tonoplast, cell organelles, cytoplasm and cell surface membrane by enzymes are which are then lost.
10 of 11
What is the xylem vessel structure?
Thick cell walls, continuous from the roots of the plant to the leaves, dead cells, hollow, they have no end walls or they highly perforated.
11 of 11
Other cards in this set
Card 2
Front
What cell walls permeable to?
Back
Water and solutes.
Card 3
Front
What is a pit?
Back
Card 4
Front
Where is can the plasmodesmata be located and why?
Comments
No comments have yet been made