Chapter 12

Question 1

Plant has 2 systems

What are they?

Answer 1

Shoot system

Root system

Question 2

What is the shoot system responsible for

Answer 2

• the transport of resources
• Reproduction
• photosynthesis

Question 3

What is the root system responsible for?

Answer 3

-absorbing water and nutrients from the soil

Question 4

Non -vascular plants

Answer 4

Non -vascular plants

• Do not contain xylem and phloem cells
• Restricted to moist environment
• No taller than 20cm
• Root like, stem like structures.

Question 5

Vascular tissue

Answer 5

Vascular tissue
In vascular plants, there are specialised cells and tissues to distribute organic compounds such as water, gases and minerals around the plant.
- Vascular tissue is involved in the transport of substances.
- Vascular tissue is composed of 2 different type of tissues which are xylem and phloem

Question 6

Xylem

Answer 6

Xylem – is responsible for the transport of water, nutrients and minerals from roots to leaves.
o These cells are dead; however, they still help transport water.
o Cells are elongated and tubular
o Tracheids and vessel elements
o Tubes formed by dead xylem cells

Xylem only goes one way

Question 7

Phloem

2 types of cells, what are they?

Answer 7

Phloem – transports sucrose around plants
o Moves sucrose up, down, left, right
o Alive – always

Phloem has 2 types of cells

• Sieve tube cells
• companion cells

Question 8

Transporting water

Answer 8

Transporting Water

4 process

1. Root pressures (via osmosis)
2. Adhesion – adherence (stick) to sides of vessel (xylem)
3. Cohesion – water molecules adhere to each other
4. Transpiration (evaporation from leaves) causes transpirational pull