U2 Transport Systems - Plants

Question 1

What are the 3 plant organs?

Answer 1

Leaves, Roots and Stem

Question 2

What are the 7 structures found inside a leaf?

Answer 2

Upper Epidermis, Palisade Mesophyll, a Vein, Spongy Mesophyll, Lower Epidermis, Guard Cells and Stomata

Question 3

What are the two parts of a plant vein?

Answer 3

Xylem and Phloem

Question 4

How is water absorbed and transported by plants?

Answer 4

Root hair cells absorb water via osmosis, the water is then brought up the xylem to leaves where it may be used for transpiration by the stomata or photosynthesis

Question 5

What is the role of lignin?

Answer 5

Allows the xylem to withstand pressure changes as water moves through the plant

Question 6

What is transpiration?

Answer 6

The process of water moving through a plant an evaporating at the stomata.

Question 7

What controls the stomata?

Answer 7

Guard cells

Question 8

What increases the rate of transpiration

Answer 8

Low humidity, high wind speeds, high temperature and a high surface area

Question 9

What is the role of the phloem tissue?

Answer 9

Transports sugar up and down plants

Question 10

Structure of Phloem

Answer 10

Contains sieve plates and companion cells.