Nat 5 Biology - Unit 2 Multicellular Organisms - The Need For Transport (In Plants)

Front 1

Name this vessle

Back 1

Xylem

Front 2

Which leaf structure is the main site of photosynthesis?

Back 2

The palisade mesophyll cells

Front 3

Where are the xylem and phloem vessels contained within the leaf structure?

Back 3

The vein

Front 4

Which area in the leaf structure allows for the exchange of gases and allows water to evaporate out?

Back 4

Stomata

Front 5

What controls the opening and closing of the pores in the leaf?

Back 5

Gaurd cells

Front 6

An area within the leaf cell which contains moist air spaces to aid with gas exchange.

Back 6

Spongy mesophyll cells

Front 7

What are the outermost layers in the leaf structure?

Back 7

The upper and lower epidermis

Front 8

Name this vessel

Back 8

Phloem

Front 9

What is the function of the phloem vessels?

Back 9

To transport sugars from the leaf to the rest of the plant.

Front 10

What are the two functions of the xylem vessels?

Back 10

To transport water from the roots to the leaves of a plant and to provide the plant with with support.

Front 11

Why does the phloem vessels have a companion cell?

Back 11

To provide the vessels with energy.

Front 12

Why do xylem vessels contain rings or spirals of lignin?

Back 12

To help provide the vessels with support by giving the walls strength.

Front 13

How do the stomata open and close?

Back 13

The guard cells fill with water during the day to open the stomata and at night the water leaves the guard cells to close the stomata.

Front 14

"Thepassage of water from the roots to the leaves and out into the atmosphere"

This defines what process?

Back 14

Transpiration or the transpiration stream

Front 15

Which cells are important in the transpiration stream for allowing water to be absorbed from the soil into the roots of a plant?

Back 15

Root hair cells

Front 16

What is the route taken by water in Transpiration?

Back 16

Soil > Root hair cells > xylem vessels > Spongy mesophyll cells > Air spaces > Atmosphere.

Front 17

What factors could affect the rate of transpiration?

Back 17

Temperature, Wind, Humidity and Air pollution

Front 18

What factors would cause an increase in the rate of transpiration?

Back 18

Temperature and Wind

Front 19

What factors would cause a decrease in the rate of transpiration?

Back 19

Air pollution and Humidity.