Transport in Plants

Question 1

This plant cell is a…

Answer 1

D - Leaf palisade cell

Question 2

Explain how the water moves from cell to cell

Answer 2

• through osmosis
• movement of water molecules from high to low concentration
• through semi permeable membrane

Question 3

Plants lose water into the air through a process called… ?

Answer 3

D - Transpiration

Question 4

B

Answer 4

B - 32g

Question 5

Describe the effect of temperature on water loss from this plant during the investigation.

Answer 5

• rises between 15-35c

- water loss decreases after 35c

Question 6

Suggest why the plastic bag was placed around the plant pot during this investigation

Answer 6

• to prevent evaporation of water from the soil

Question 7

Explain how glucose production could be affected if this plant lost a lot of water

Answer 7

• glucose production will decrease

because

• photosynthesis will decrease
• as water is used in photosynthesis

Question 8

Describe the process that moves water from the soil into the plant

Answer 8

• through osmosis
• movement of water molecules from high to low concentration
• through semi permeable membrane

Question 9

Mineral ions are taken up by the root hair cells of the plants

Name the type of vessel that transports these mineral ions through the plants

Answer 9

• Xylem

Question 10

Explain why there was an increase in the mass of the courgette in the sugar solution at 0.2

Answer 10

• increase in mass due to osmosis
• water into the cell
• higher concentration of water outside courgette
• water across cell membrane

Question 11

Potato Percentage Change

Answer 11

-4.9

negative

Question 12

Suggest why calculating a percentage change is more useful than calculating the change in mass in this investigation

Answer 12

• easier to compare results

Question 13

Explain how active transport and diffusion provide a plant with named substances it needs for growth

Answer 13

• active transport requires energy
• moves mineral ions from the soil into root hair cells
• pumps into the cell membrane
• from low to high concentration so requires energy
• against concentration gradient
• diffusion is passive process
• gases diffuse from high to low concentration doesn’t require energy
• gas exchange in leaf occurs by diffusion
• carbon dioxide diffuses in
• to air spaces in leaves
• for photosynthesis produces glucose

ACTIVE TRANSPORT REQUIRES ENERGY TO TRANSPORT MINERAL IONS INTO THE ROOT HAIR CELL AND CARBON DIOXIDE DIFFUSES INTO THE LEAF FOR PHOTOSYNTHESIS

Question 14

Explain how water moves into these plants

Answer 14

• into root hairs
• by osmosis
• through partially permeable membrane

Question 15

Salt was added to the water in the beaker to form a salt solution

Explain how the salt solution would affect the movement of water into and out of the plant

Answer 15

• faster movement of water out of the plant

- because less water is outside the plant than inside

Question 16

When the concentration of mineral ions in the soil is greater than in the root hair cell, mineral ions are transported into the root hair cells by…?

Answer 16

A - Diffusion

Question 17

Explain how water, glucose and mineral salts are transported through a plant (6)

Answer 17

WATER:

• through the xylem
• capillary action
• osmosis into the cells in the leaf
• evaporation from the leaves
• transpiration stream
• diffusion into the atmosphere
• through stomata

GLUCOSE:

• converted to sucrose
• dissolved in water
• through the phloem
• bidirectional

MINERAL SALTS:

• dissolved in the water
• through the xylem
• from root to tip