Download Plant Revision Sheet

Plants Revision sheet (Do not write on this sheet)
Question 1:
Here is a diagram of a typical flower.
In your book
(a) Name the parts
B to I. A and J are done for you
(b) Give the functions
for F, G, H and I only.
A is the Capel and J is the Stamen
(c) Some plants are pollinated by the action of the wind rather than by insects. Explain the general
characteristics of the flowers of wind pollinated plants.
(d) Discuss the movement of pollen from the flower it was produced in to an ovule.
(e) For 2 plants you have studied / talked about throughout this topic describe how their seed is moved
and what adaptations the plant / seed has that helps in moving the seed. E.g A dandelion uses wind to
move the seeds and the seeds are very light with feathery bits to catch the wind.
(f) Water is needed for seed germination. Explain why.
(g) Explain the purpose of the cotyledon to the developing embryo.
(h) When a seed germinates, the radicle has appears before the plumule. Discuss why this occurs.
Question 2
(a) Complete the following word equation, which summarises photosynthesis.
Light
energy
+
+
+
chlorophyll
[raw materials]
[products]
(b) Commercial plant growers use large glasshouses. Additional carbon dioxide gas is sometimes pumped
into the glasshouses during the day. Discuss why.
In this topic, you carried out the starch test.
(c) Describe what you would see if a leaf showed a positive test for starch:
Explain the reasons for each step below in the starch test
Leaf in
meths
Water bath
(d) Boil the leaf in meths.
(e) Soak the leaf in hot water.
Heat
(f) Cover the leaf with iodine solution
Question 3
Here is a picture of the plant structures through which water is lost.
(a) Name the structure.
(b) Name the process which describes the water loss.
(c) Where on the plant are the structures found?
(d) Discuss all the functions of these small holes. Include:
 Movement of water through the plant.
 Requirements for photosynthesis and respiration
Question 4
A plant has three main parts; The leaves, the stem and the roots.
(a) Explain the main functions of each part.
(i)
The leaves.
(ii)
The stem.
(iii)
The roots.
Examine the table below describing flower structure.
Structure
Petals
Anthers
Wind pollinated
Small, Green
Large, produce lots of pollen
Insect pollinated
Large, coloured
Small, produce limited amounts of pollen
(b) Discuss why structures of a wind pollinated plant are different to that of an insect pollinated plant.
(c) Explain why it is important for seeds to be dispersed as far as possible from the parent plant.
Q
Evidence
1 a) + b)
B=stigma
C= style
D= ovary
E=ovule / egg
F= Petal (To attract insects)
G=anther (To produce pollen)
H= filament (hold up anther)
I=sepal (To protect the bud / developing
flower)

Wind – less colour / nectar -(no need
to waste energy on food production).

Shape more open / filament- higher
so wind can catch / move.

Smaller – save energy

Light pollen - carry in wind.

Pollen produced in anther

Pollen transferred to stigma

When pollen lands on stigma it sticks
to it

Pollen tube grows down the style

reaching the ovule where it fertilises
the egg to produce a seed
Names, adaptations described, adaptation
explained
c)
d)
e)
f)

g)



h)

2 a)
b)
c)
d)
e)
f)
3 a)
b)
c)
d)
Water to enlarge cotyledons/break
testa
To release embryo
To provide a source of food
Until the embryo is able to produce
its own food (by photosynthesis).
The developing embryo needs water
to germinate and grow.

It does not need to use the plumule
to make food initially - has the
source of food in the cotyledon.

Also stabilizes plant
Water + carbon dioxide → glucose + oxygen

P/s requires CO2.

CO2 – p/s use greater during day.

P/s makes glucose

Respiration breaks down glucose to
energy.

Energy needed for better
growth/production
Starch goes blue / black colour

To remove the chlorophyll from the
leaf

colour change in the iodine can be
clearly seen.

Remove meths

softens the leaf and allows it to be
spread out flat for testing.

Colour change

To detect areas of photosynthesis
(a) Stomata
(b) Transpiration
(c) Leaf

They must have a place for CO2 to
enter (or O2 to leave) for
Photosynthesis

O2 enter / CO2 leave for respiration

Water required for photosynthesis
released or cooling.
Answers
Achievement
Merit
5 parts identified correctly
Achieved + 3 functions
given correctly
2 adaptations
2 adaptations explained
Pollination
And
Fertilization described
Pollination and
Fertilization explained
includes pollen tube.
1 Name + 1 adaptation
described or adaptation
explained
2 Names, and
adaptations described
and 1 adaptation
explained
Explains to release
embryo
Water needed for to break
testa
Food source
Radicle gets water
or
stabilises plant
Complete answer
(mention of
photosynthesis not
needed)
Radicle gets the water
the plant needs to grow
and
Excellence
Pollination and
fertilization
discussed.
Includes pollen
tube and
gametes(ovule)
fuse and seed.
Merit and
plumule not
needed as seed
has food in
cotyledon.
stabilises
3 terms correct
One point
Explain 2 points.
Correct answer
1 point
both points
Removes meths
Both points
Colour change
2 correct
Colour change and
photosynthesis
All 3 correct
1 point.
2 points explained
Explain and link
3 points.
All 3 points
discussed
4 a i)
ii)
iii)
b)
c)
The leaves are where photosynthesis
takes place/ where the plant makes its
food. / Gas exchange occurs /
Transpiration occurs etc
The stem holds the leaves up to the
light AND transports food AND
transports water
The roots absorb water from the
ground and anchor the plant securely
Insect – petals are brighter (so insects
can see them), nectar is produced (to
attract insects with food) flower shape
makes insects brush / filament stigma
Wind – less colour / nectar (no need to
waste energy on food production)
shape more open / filament higher so
wind can catch / move pollen
So the seed is not competing with the
parent for light / water / nutrients
One function
One function
Two functions
One function
Two function
2 difference described
2 differences
described + 1
explanation
Reasonable answer
3 or more differences
described + 2
explanations