Biology 2

Question 1

What is the role of phloem

Answer 1

Phloem is a plant tissue thattransports food and other substances throughout the plant.

Question 2

What is the role of xylem

Answer 2

The role of xylem is to transport water and dissolved minerals from the roots to the leaves

Question 3

What is the name of the process pathway taken by water to the xylem

Answer 3

Osmosis causes water to pass into the root hair cells, through the root cortex and into the xylem vessels.

Question 4

What is transpiration

Answer 4

Transpiration is the loss of water by evaporation from the leaves of plants.

Question 5

Describe how water is lost from a plant by transpiration.

Answer 5

Water evaporates from the surface of mesophyll cells in the leaf into the air spaces in the leaf.
Water vapour diffuses out of the leaf through the stomata

Question 6

What is the function of palisade mesophyll

Answer 6

Main site of photosynthesis due to high chloroplast content

Question 7

What is the function for spongy mesophyll

Answer 7

Gas exchange

Question 8

Function of air spaces

Answer 8

Facilitate gas movement for photosynthesis and respiration

Question 9

Function of stomata and guard cells

Answer 9

Regulate gas exchange and water loss through transpiration