Download Give 3 advantages of having a wide range of plants

Give 3 advantages of having a wide
range of plants.
Name the 3 parts of a seed.
ANS
More choice of food / more habitats
More raw materials to use
More medicines
ANS Seed coat, food store and
embryo
Give 3 specialist uses of plants
What is the function of the seed
coat?
ANS
For medicines, food and raw material
ANS Protects the seed
List 3 potential uses of plants.
Credit
ANS New medicines, new raw
materials, new foods / making biofuels
List 1 possible consequence to humans
if there is a reduction in the variety
of plant species. Credit
ANS Less food to eat OR less
medicines
List 1 possible consequence to animals
if there is a reduction in the variety
of plant species. Credit
ANS Less habitats OR Less food to
eat
What is the function of the food
store in the seed?
ANS To provide the embryo with
energy to grow
What is the function of the embryo?
ANS To grow into a new plant
List 3 factors that are required for
germination.
ANS warmth, oxygen, water
Why do seeds need oxygen to
germinate?
What is the function of the anthers in
a flower?
ANS To aerobically respire which will
provide give energy
ANS To produce the pollen grains
Why do seeds need water?
What is the function of the stigma in
a flower?
ANS to allow the enzymes in the seed
to work
ANS To catch the pollen grains
Why do seeds need warmth?
What is the function of the ovary in
flower?
ANS To provide an optimum
temperature for the enzymes to work
What is the function of the sepals in
a flower?
ANS To protect the flower bud
What is the function of the petals in
a flower?
ANS To produce the female eggs
(ova)
What is the function of nectary in a
flower?
ANS To attract insects into the
flower as it a food for them
Explain pollination
ANS if the petals are coloured they
will attract insects
What is the function of the stamen
ANS It is the male reproductive part
of the flower
ANS The transfer of pollen from the
anther to the stigma.
List two methods of pollination
ANS wind and insect
Why does the stamen hang out of the
flower in a wind pollinated flower?
Credit
ANS The stamen hangs out of the
flower to put the pollen into the wind
Why does the stigma hang outside a
wind pollinated flower? Credit
ANS To catch the pollen in the wind
Why does the male gamete travel
down the pollen tube? Credit
ANS To fertilise the female egg in
the ovule
Which part of the flower forms the
fruit?
ANS The ovary
Why do insect pollinated flowers have
nectar. Credit
List 3 ways that a fruit can be
designed to disperse the seeds.
Credit
ANS To attract insects into the
flower
ANS Wind, animal internal and
animal external
Why do insect pollinated flowers have
anthers inside the flower? Credit
Describe a fruit that can use wind
disperal. Credit
ANS So they can stamp the pollen
onto the insects when it visits the
flower
ANS
The fruit can fly through the
air by having feathery parachutes or
by wings
What happens after the pollen lands
on the stigma? Credit
ANS It grows a pollen tube down to
the ovule in the ovary
Describe a fruit that uses animal
internal to disperse the seeds. Credit
ANS
The fruit will be edible
Describe a fruit that uses animal
external to disperse the seeds.
Credit
List 2 advantages of plants using
sexual reproduction. Credit
ANS The fruit will have hooks to
attach to the animal
ANS Offspring will show variation
which helps them survive
Seeds can be dispersed to a new area
to reduce competition.
Describe two ways to artificially
propagate plants.
ANS Grafting and cuttings
Name two advantages to humans using
artificial propagation of plants.
Credit
ANS It produces a guaranteed type
of plant / It produces a lot of plants
quickly
What is meant by the term clone?
Credit
ANS Offspring that are genetically
identical to the parent
Name 2 ways plants can naturally
produce new plants by asexual
reproduction.
ANS Runners and tubers
List 2 advantages of a plant using
asexual reproduction. Credit
ANS It can produce lots of plants
quickly covering an area to reduce
competition
It guarantees to pass on any suitable
genes to the offspring.
Why do plants need a transport
system?
List one other function of the xylem
vessels other than transport. Credit
ANS To transport substances from
roots to leaves and leaves to roots.
ANS
What substances are transported in
the xylem vessels?
Which part of the plant allows CO2
gas to be taken in from the air?
ANS Water and minerals from root
to the rest of the plant
What is transported in the phloem?
ANS Food from leaves to rest of the
plant.
Describe the structure of the xylem
vessels? Credit
ANS
Long, hollow, lignified tube
Describe the structure of the phloem
tubes. Credit
ANS Have sieve cells with
perforated cross walls to transport
the food and companion cells, with a
nucleus, to keep sieve cells working.
For support
ANS Through the stomata in the
leaves
List the 4 tissues in a leaf. Credit
ANS Upper epidermis, palisade and
spongy mesophyll and lower epidermis
List two ways the leaves are designed
to allow gas exchange. Credit
ANS Stomata on the underside of the
leaf / very thin / air spaces in the
spongy mesophyll tissue
List 3 fates of CO2 taken in by the
leaves of the plant. Credit
ANS In starch (a storage
carbohydrate) or in cellulose (a
structural carbohydrate) or glucose
(an energy source)
What do green plants convert light
energy into?
ANS chemical energy
What do plants need to have to
change light energy into chemical
energy?
ANS Chlorophyll
What two raw materials do plants
need to take in to carry out
photosynthesis?
ANS H2O and CO2
What are the 2 products of
photosynthesis.
ANS Glucose + oxygen
List 3 limiting factors of
photosynthesis. Credit
ANS CO2 concentration, light
intensity and temperature
Explain the definition of a limiting
factor in photosynthesis. Credit
ANS Any factor, which if in short
supply, will limit the rate of
photosynthesis