Leaf structure Flashcards
1
Q
What two types of transport vessels do plants have?
A
Xylem and phloem vessels
2
Q
What substance helps with the adaptation of xylem vessels and what does it do?
A
A substance called lignin is deposited in the cell walls which causes the xylem cells to die
3
Q
Why is it useful that the cells in the xylem vessels are dead? How does this help with the adaptation?
A
These cells then become hollow (as they lose all their organelles and cytoplasm) and join end-to-end to form a continuous tube for water and mineral ions to travel through from the roots
4
Q
What is the structure of phloem vessels?
A
The cells are joined end to end and contain holes in the end cell walls (called sieve plates) which allow easy flow of substances from one cell to the next
