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Q1.
The diagram shows a spider plant during one type of reproduction.
Complete the sentences using words from the box.
asexual
gametes
(a)
characteristics
genes
chromosomes
mitosis
sexual
The colour and shape of the leaves of a spider plant are known
as .......................................................................................................................... ......
(1)
(b)
The shape of the leaves is controlled by ....................................................................
(1)
(c)
The thread-like structures inside the nucleus of the cells are
called ...................................................................................................................... ....
(1)
(d)
The spider plant produces new cells in the runner by a process
called ...................................................................................................................... ....
(1)
(e)
This type of reproduction is called ...................................................... reproduction.
(1)
(Total 5 marks)
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Q2
These are all dogs. They are in the same species.
(a)
What does it mean to be in the same species?
............................................................................................................................. .......
....................................................................................................................................
(2)
(b)
Complete the following sentences.
•
When dogs reproduce the .................................................. produces sperm in
the
..................................... and the female produces eggs in the
....................................
•
Sperm and eggs are also called ....................................
•
During mating, the sperm and eggs fuse together. This is known as
....................................
•
Once this has happened the .................................... starts to develop in the
uterus of the mother.
(6)
(c)
Explain why puppies have some of the characteristics of both parents.
............................................................................................................................. .......
.................................................................................................................... ................
............................................................................................................................. .......
(2)
(Total 10 marks)
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Q3.
(a)
The diagram shows how pigs can be cloned.
For each question write the correct letter in the box.
Which structure, A, B, C or D is:
(i)
an egg cell
(1)
(ii)
a nucleus
(1)
(iii)
an embryo?
(1)
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(b)
Walking onion plants grow a bunch of bulblets (tiny bulbs).
The bulblets start to grow and the stalks bend over with the weight of the new
growth.
This makes the onion plant seem to walk across the garden.
Producing plants in this way is called asexual reproduction.
Use words from the box to complete the following sentences.
chromosome
clone
gamete
gene
parent
Asexual reproduction needs only one .............................................. .
Asexual reproduction does not involve production of a ......................................... .
The daughter plant is called a ................................................ .
(3)
(Total 6 marks)
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Q4.
A gardener took four cuttings from the same plant and put them in compost.
He kept them in different conditions.
The diagrams show each cutting some time later.
(a)
Use information from the diagrams to answer this part.
(i)
The most important condition needed for cuttings to develop is that
they should be kept ..........................................................................................
(1)
(ii)
Explain why you chose this condition.
...........................................................................................................................
(2)
(b)
Gardeners often grow new plants from cuttings instead of from seeds.
Give a reason for this.
...................................................................................................................... ...............
(1)
(Total 4 marks)
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M1.
(a)
characteristics
1
(b)
genes
1
(c)
chromosomes
1
(d)
mitosis
1
(e)
asexual
1
[5]
-
M2.
(a)
breed (together)
accept have same number of chromosomes
do not accept have the same number of genes
1
to produce fertile offspring
1
(b)
male or testes
accept dog
1
testes or male
accept testis
do not accept testicles
1
ovary or ovaries
1
gametes
1
fertilisation
do not accept conception
1
fetus or zygote or embryo
do not accept baby or puppy
1
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(c)
genetic information or genes or
chromosomes or DNA
do not accept characteristics by itself
1
(comes) from two parents
accept from both parents
1
[10]
M3.
(a)
(i)
D
1
(ii)
C
1
(iii)
B
1
(b)
parent
1
gamete
1
clone
1
[6]
M4.
(a)
(i)
moist (warm and cold are neutral)
for 1 mark
1
(ii)
idea that roots / plants (only) grow with moisture (second
condition negates answer)
idea that same (amount of growth) whether warm or cool
for 1 mark each
2
(b)
idea that quicker / cheaper / more successful / same as the parent plant
for 1 mark
1
[4]
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