Transcript Growing Presentation - Hillpark Secondary School

The World of Plants
(B) Growing Plants
W. McConnell 2004 Kinross High School
1.
Give the function of the following parts
of a seed
Seed coat
protection
Embryo plant
grows into new plant
Cotyledon
food store until the
first green leaves
appear
W. McConnell 2004 Kinross High School
2.
In the following experiment to investigate conditions for
germination of cress seeds, what conclusion do you come to?
Tube
Conditions
Present
Conditions
absent
1
2
3
4
heat
heat
light
moisture
heat
moisture
moisture
oxygen
oxygen
w ater
oxygen
none
w ater
heat
0%
100%
0%
0%
Percentage
of seeds
germinated
Answer:
•Seeds need oxygen, water and heat to germinate
•Seeds do not need light to germinate
W. McConnell 2004 Kinross High School
3..
Why can a large seed be
planted deeper in the ground
than a small seed?
Answer:
If a small seed was planted too deeply in
the ground it would use up its food store
(in the cotyledon) before the first green
leaves appeared.
W. McConnell 2004 Kinross High School
4..
What is the name given to the temperature
at which seeds will germinate best at?
Answer:
The optimum temperature.
W. McConnell 2004 Kinross High School
5..
Below is table to show what percentage of seeds
germinate at different temperatures. What is the
optimum temperature for germination ?
o
Temp ( C)
0
15
20
25
30
35
Answer:
%
Germination
0
50
100
40
30
8
20oC
W. McConnell 2004 Kinross High School
6..
Why was there no germination at 00C ?
o
Temp ( C)
0
15
20
25
30
35
Answer:
%
Germination
0
50
100
40
30
8
Because it was too cold for the
enzymes involved in germination to
function.
W. McConnell 2004 Kinross High School
7..
Give the function of each of the following
parts of a flowering plant
Petal
colour / scent to attract insects
Sepal
protects the bud before it opens
Anther
produces pollen
Nectary contains nectar to feed insects
W. McConnell 2004 Kinross High School
8..
What is the definition of fertilisation?
Answer:
Joining together the male and female
gamete.
W. McConnell 2004 Kinross High School
9..
What is meant by pollination in a
flowering plant?
Answer:
?
The process by which pollen
grains travel from anther to
stigma.
W. McConnell 2004 Kinross High School
10..
What is the difference between self
pollination and cross pollination?
a) Self Pollination means Pollen is transferred from anther to stigma of
the same flower.
b) Cross pollination means -
Pollen is transferred from anther to stigma of a
different flower.
W. McConnell 2004 Kinross High School
11..
What is the difference between wind
pollination and insect pollination?
a) Wind Pollination means Pollen grains are transferred by the wind.
b) Insect pollination means Pollen grains are transferred by insects.
W. McConnell 2004 Kinross High School
12.. Below is a table comparing the structure of wind and
insect pollinated flowers. Fill in the gaps.
Insect Pollinated
Petals large and coloured
Sticky, spiky pollen
Scented
Usually produce nectar
W. McConnell 2004 Kinross High School
Wind Pollinated
Petals small and green
Small, light pollen
No scent
Never produce nectar
13..
Below you will see a list of flowers. Which are
insect pollinated and which are wind pollinated?
•Buttercup -
Insect
•Grass
Wind
-
•Dandelion -
Insect
•Barley
-
Wind
•Tulip
-
Insect
•Lavender - Insect
W. McConnell 2004 Kinross High School
14..
•The pollen grain lands on the stigma.
______
• The male sex cell is inside the pollen
_____
and grows a tube down through the ____
style
to reach the female sex cell in the ovary.
_____
W. McConnell 2004 Kinross High School
15..
What term describes the pollen nucleus
joining with the ovule nucleus ?
Answer:
Fertilization
W. McConnell 2004 Kinross High School
16..
Where does fertilization take place in a
plant?
Answer:
In the ovary
W. McConnell 2004 Kinross High School
17..
Name the structure which always
contains the seeds.
Answer:
The fruit
W. McConnell 2004 Kinross High School
18..
After fertilisation what do the following
parts of the flower become?
The flower stalk becomes.. the fruit stalk
The ovary becomes..
the fruit
The ovules become..
the seeds
The petals,stamen,stigma.. wither and drop off
W. McConnell 2004 Kinross High School
19..
By what method of dispersal are the
following seeds scattered?
•Dandelion - wind
animal internal
•Bramble
-
•Tomato
- animal internal
•Burdock
- animal external
- wind
•Ash
•Strawberry - animal internal
water
•Coconut
W. McConnell 2004 Kinross High School
20.
What is meant by asexual reproduction?
Answer:
•Only one parent involved
•No sex cells produced
•Producing new plants without forming seeds
•No pollination involved
W. McConnell 2004 Kinross High School
21.
What type of asexual reproduction do the
following plants display?
A potato
-
tuber
A strawberry -
runner
An onion
bulb
-
W. McConnell 2004 Kinross High School
22.
Which method of vegetative reproduction
is the following statement describing?
“special stems grow out from the parent
plant and when they make contact with the
earth, roots begin to grow. In time a new
plant is produced.”
Answer:
A runner
W. McConnell 2004 Kinross High School
23.
Give some disadvantages of asexual
reproduction.
Answer:
Plants may be overcrowded
No variation of plant characteristics
Any undesirable characteristics will be passed on
W. McConnell 2004 Kinross High School
24.
Give some of the advantages of asexual
reproduction.
Answer:
•Rapid growth – available food stores from parent
•No vulnerable stages of germination and early seed
growth
•Colonies of the same kind of plant will form – no room
for competition
W. McConnell 2004 Kinross High School
•How many of the questions did you
answer correctly?
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W. McConnell 2004 Kinross High School