Chapter 3.3-Transport in Plants

Question 1

What do every cell of multicellular plants need a regular supply of ?

Answer 1

• oxygen
• water
• nutrients
• minerals

Question 2

What direction do water, minerals and sugars travel in a plant?

Answer 2

• water and minerals are moved from the roots up to the leaves
• sugars are moved from the leaves to the rest of the plant

Question 3

What is vascular tissue in plants?

Answer 3

consist of cells specialised for transporting fluids by mass flow

Question 4

What is the role of the xylem tissue in plants?

Answer 4

transports water and soluble mineral ions travel upwards in xylem tissue

Question 5

What is the role of the phloem tissue?

Answer 5

assimilates, such as sugars, travel up or down in phloem tissue

Question 6

What are dicotyledonous plants?

Answer 6

plants with two seed leaves and a branching pattern of veins in the leaf

Question 7

What is the job of collenchyma and sclerenchyma found in the vascular bundles in plants?

Answer 7

give the bundle some strength and help to support the plant

Question 8

What are vascular bundles?

Answer 8

this is where xylem and phloem are found together

Question 9

Where is the xylem and phloem found in a young root?

Answer 9

• central core of xylem, often in the shape of an X

- phloem is found in-between the arms of the X shaped xylem tissue

Question 10

What is the endodermis?

Answer 10

special sheath of cells which has a key role in getting water into the xylem vessels

Question 11

What are the meristem cells?

Answer 11

a layer of dividing cells, here it is called the pericylce

Question 12

Where is the cortex and the medula in a young root?

Answer 12

• outside portion of the tissue

- everything contained inside the tissue

Question 13

How is the vascular bundles arranged in the stem of a plant?

Answer 13

• found near the outer edge of the stem
• in non-woody plants the bundles are separate and discrete
• in woody plants the bundles are separate in young stems, but become a continuous ring in older stems

Question 14

How does the structure of the vascular tissue in the stem of the plant help it carry out its function?

Answer 14

provides strength and flexibility to withstand the bending forces to which stems and branches are exposed

Question 15

How is the phloem and xylem arraigned in the stem of a plant?

Answer 15

-xylem is found towards the inside of each vascular -bundle and the phloem towards the outside

Question 16

What is the cambium and where is it found?

Answer 16

• found in-between the xylem and phloem in the stem of plants
• layer of meristem cells that divide to produce new xylem and phloem

Question 17

Where is the collenchyma and sclerenchyma found in the stem of plants?

Answer 17

• sclerenchyma is found on the outside of the phloem

- collenchyma is found at the inner side of the cortex

Question 18

How is the xylem and phloem arranged in the leaf?

Answer 18

• form a central midrib

- xylem is located on top of the phloem