transport in plants

Question 1

feature of root hair cells

Answer 1

provide high surface area

Question 2

water movement in the root

Answer 2

1. water is drawn up to the xylem
2. water is forced to cross the membrane and cytoplasm of the cell. the cell walls contain waxy material so it can select which substance to enter
3. water crosses the living cells of the cortex by osmosis and suction
4. water enters root hair cell by osmosis

Question 3

what needs to be picked up by active transport in the root

Answer 3

ions

Question 4

what is the source and sink in transportation in the plant

Answer 4

source is where they are taken in

sink is where they are stored

Question 5

placement of phloem and xylem in the stem

Answer 5

phloem is outside, xylem is inside (poxi)

Question 6

placement of phloem and xylem in the root cell

Answer 6

xyleminside (like a cross), phloem outside

Question 7

describe transpiration

Answer 7

1. water evaporate through stomata ( diffusion )
2. water moves from xylem ( osmosis)
3. water moves up the stem (due to tension caused by water loss)
4. water uptake from the soil (osmosis)

Question 8

structures of the leaf may reduce transpiration

Answer 8

thick waxy cuticle, needle-shaped leaves to reduce the surface area

Question 9

atmospheric condition that increases the rate of transpiration

Answer 9

wind, high temperature, low humidity, high light intensity

Question 10

feature of xerophytes

Answer 10

xerophytes ( desert plants)
needed-shaped leaves
shallow roots

Question 11

feature of hydrophytes

Answer 11

hydrophytes ( water plants)
thin cuticle or no cuticle
stomata on the upper surface

Question 12

what is plasmolysed

Answer 12

the condition of the plant cell that has lost much water is that its cytoplasm shrinks and pull the cell membrane away from the cell wall.