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B4 a-d Pig (F)

Name the pores in the bottom of a leaf
 Stomata

What is the job
of air spaces?
 Allow
gases to diffuse from palisade
cell to air/air to palisade cell

List 3 adaptations
of a leaf for
efficient
photosynthesis
 Broad
(large surface area)
 This (short diffusion distance)
 Palisade cells have many chloroplasts
(containing chlorophyll)
 Veins bring water/remove sugar
 Stomata allow carbon dioxide
in/oxygen out

What is osmosis

Diffusion of water
from a high water
concentration to a
low water
concentration
across a partially
permeable
membrane
 What
is a partially permeable
membrane?

A membrane that
only lets certain
(small) molecules,
like water, through

What will happen
to a red blood cell
if you inject pure
water into your
veins?

Water will enter the cell by osmosis until it
bursts

What do you call a plant cell that has lost
a lot of water by osmosis
 Flaccid/plasmolysed

Name tube Z
Phloem

What is the job of phloem?
 Transporting
sugars around the plant

What is this
device called
and what is it
for?
 Potometer
 Measuring
water uptake (allow
transpiration) in a plant

What is transpiration?
 Loss
of water vapour from the leaves

List 2 ways of increasing the rate of
transpiration
 Increase
temperature
 Increase wind speed
 Decrease humidity
 Increase light intensity
 List
4 minerals needed by a plant
Nitrate
 Phosphate
 Potassium
 Magnesium


Why does a plant
need magnesium?
 To
make chlorophyll (for
photosynthesis)

What will a plant
look like if it is
grown with very
little nitrate?

small

How do minerals
enter a root hair?
 Active
transport