PPE Autumn Year 1 Plants Pre Y12

Question 1

Water in plants

Answer 1

Enters the roots by osmosis
Travels through the root to the xylem- transports water through the plant & up to the leaves

Question 2

Symplast

Answer 2

Water moves through the root via the cytoplasm of the root cells
Water has to cross the cell membrane- regulates the passage of water & dissolved minerals

Question 3

Apoplast system

Answer 3

Water moves through the cell walls & the spaces between the cells
No membranes to regulate the passage

Question 4

Phloem

Answer 4

Transport of carbohydrates, sugars and other organic compounds (Translocation)
Arranged in tubes so solutions of sugars can move through them easily
Translocation occurs in sieve tubes
Companion cells next to the sieve tubes are believed to actively transport sugar into the sieve tubes & water follows by osmosis