Chapter 4 Pholem And Xylem Cells

Question 1

1 Transpiration

Answer 1

The transpiration stream is the movement of water upwards xylem cells

Question 2

2. Transpiration

Answer 2

Is the evaporating on the leaves.

Question 3

3. Translocation

Answer 3

Is the movement of sugary sap up and down the stem

Question 4

Phloem vessels-they are on the outside

Answer 4

Phloem carries sugary sap up and down. This process is called translocation.

Question 5

There are xylem vessels

Answer 5

They are towards they middle

Xylem carries water and minerals upwards- this is called the transpiration

Question 6

Dissection of a celery

Answer 6

Vessels are evenly distributed

Water contained inside long continuos tubes.

Question 7

Function of the upper epidermis

Answer 7

One cell thick and covers it like a leaf.

Also contains a waxy layer on the top.

Question 8

Function of the Palisade mesophyll layer

Answer 8

Cylindrical shape this helps the light penetrate into the leaf

Question 9

Function of the Spongy mesophyll layer

Answer 9

Consists of irregular shaped cells with large air spaces between them.

Question 10

Function of the Lower epidermis

Answer 10

It contains pores called stomata

Question 11

Function of the guard cells

Answer 11

Changes conditions, light intensity

Question 12

Function of the leaf vein

Answer 12

Water and salts enter the leaf via the xylem