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W. McConnell 2004 Kinross High 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
Embryo plantCotyledon
protection
grows into new plant
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 1 2 3 4
Conditions
Present
heat
light
moisture
heat
moisture
oxygen
heat
oxygen
moisture
water
Conditions
absentoxygen none water heat
Percentage
of seeds
germinated
0% 100% 0% 0%
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..
Answer:
What is the name given to the temperature at which seeds will germinate best at?
The optimum temperature.
W. McConnell 2004 Kinross High School
5..
Answer: 20o
C
Below is table to show what percentage of seeds germinate at different temperatures. What is the optimum temperature for germination ?
Temp (oC)%
Germination0 015 5020 10025 4030 3035 8
W. McConnell 2004 Kinross High School
6..
Answer:
Temp (oC)%
Germination0 015 5020 10025 4030 3035 8
Why was there no germination at 00C ?
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
Sepal
Anther
Nectary
colour / scent to attract insectsprotects the bud before it opens
produces pollen
contains nectar to feed insects
W. McConnell 2004 Kinross High School
8.. What is the definition of fertilisation?
Joining together the male and female gamete.
Answer:
W. McConnell 2004 Kinross High School
9..What is meant by pollination in a flowering plant?
The process by which pollen grains travel from anther to stigma.
Answer:
?
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.
Pollen is transferred from anther to stigma of a different flower.
b) Cross pollination means -
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.
Pollen grains are transferred by insects.
b) Insect pollination means -
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 Wind Pollinated
Petals small and greenPetals large and coloured
Sticky, spiky pollen Small, light pollen
Scented No scent
Usually produce nectar Never produce nectar
W. McConnell 2004 Kinross High School
13..Below you will see a list of flowers. Which are insect pollinated and which are wind pollinated?
•Buttercup -
•Grass -
•Dandelion -
•Barley -
•Tulip -
•Lavender -
Insect
Insect
Insect
Insect
Wind
Wind
W. McConnell 2004 Kinross High School
14..
•The pollen grain lands on the ______
• The male sex cell is inside the _____
and grows a tube down through the ____
to reach the female sex cell in the _____
pollen
style
ovary.
stigma.
W. McConnell 2004 Kinross High School
15..
Answer:
What term describes the pollen nucleus joining with the ovule nucleus ?
Fertilization
W. McConnell 2004 Kinross High School
16..
Answer:
Where does fertilization take place in a plant?
In the ovary
W. McConnell 2004 Kinross High School
17..
Answer:
Name the structure which always contains the seeds.
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 ovary becomes..
The ovules become..
The petals,stamen,stigma..
the fruit stalk
the fruit
the seedswither and drop off
W. McConnell 2004 Kinross High School
19..
•Dandelion -
•Bramble -
•Tomato -
•Burdock -
•Ash -
•Strawberry -
•Coconut -
By what method of dispersal are the following seeds scattered?
wind
animal internalanimal internalanimal externalwind
animal internal
water
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.
A potato -
A strawberry -
An onion -
What type of asexual reproduction do the following plants display?
tuber
runner
bulb
W. McConnell 2004 Kinross High School
22.
“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.”
Which method of vegetative reproduction is the following statement describing?
Answer: A runner
W. McConnell 2004 Kinross High School
23.Give some disadvantages of asexual reproduction.
Plants may be overcrowded
No variation of plant characteristics
Any undesirable characteristics will be passed on
Answer:
W. McConnell 2004 Kinross High School
24.Give some of the advantages of asexual reproduction.
•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
Answer:
W. McConnell 2004 Kinross High School
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