Xerophytic Plants & Water Loss - exam practice

1, 2, 3, 4, and 5

1, 2, and 3 only

1, 3, and 4 only

2, 4, and 5 only

adding a waterproof layer

protecting the stomata

reducing the surface area

trapping a layer of moist air

to allow osmosis to take place

because they all have a large surface area to volume ratio

to carry sucrose to their leaves

to overcome the limitations of diffusion over large distances

smooth cordgrass grows in highly saline marine estuary environments

the water lily has aerenchyma tissue to allow the movement of gases to submerged roots

the poison tree has leafless branches covered in thorns to reduce water loss

water lobelia completes its entire life cycle submerged in shallow ponds

an extensive root system that extends far from the plant

leaves that are reduced to spines that prevent damage from animals

the ability to store carbon dioxide so stomata only need to open at night

the surface covered in reflective hairs

ABA causes fruit ripening

ABA prevents leaf drop

ABA causes phototropism

ABA stimulates stomatal closing

large plants have a low surface area to volume ratio

plant cells have a low metabolic rate

plants generate ATP during photosynthesis, so they do not need to respire

plants generate oxygen during photosynthesis

cuticle

stomata

xylem vessels

phloem tubes

high stomatal density on the upper surface

hairy leaves

thick cuticle

reduced leaf size

broad, flat leaves

thin cuticle layer

high rate of transpiration

rolled leaves to reduce water loss

to increase water absorption

to protect from herbivores

to reduce water loss

to enhance gas exchange