Making new animals that have characteristics different to the parents
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Asexual reproduction
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Sexual reproduction
Q.2.
Which of the following is true about plant tissue culture?
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It is used to produce plants in sterile conditions, reducing the chances of transmitting diseases and pests
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It is used to produce plants whose seeds have a low chance of germinating
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It is used to create new varieties of flowering plants
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It is used to produce exact copies of plants that produce particularly good flowers or fruits
Q.3.
Why does asexual reproduction produce genetically identical offspring?
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Because there is no fusion of gamete
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Because two identical gametes are fused
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Because two parents are needed
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Because it is another term for genetic engineering
Q.4.
As well as leaves, spider plants grow long branches with lots of plantlets (miniature spider plants) attached. What is the name of this form of asexual reproduction?
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Long-cloning
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Tubers
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Rhizomes
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Runners
Q.5.
During tissue culture, why are plant cells washed in antiseptic before placing them into the culture medium?
0%
To ensure that no microorganisms grow on the culture medium and new plants
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To destroy any unwanted plant cells, leaving only the cells for cloning
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To prevent viruses from getting into the plant cells
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In case any of the plant cells have cuts or bruises on them
Q.6.
Why are plants easier to clone than animals?
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They are smaller
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They are bigger
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Plant cells can differentiate into different cell types
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They contain chlorophyll which is a good cloning medium
Q.7.
When cloning animals from adult cells, which part of the cells is involved?
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The cell membrane
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The cell nucleus
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The cytoplasm
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The vacuole
Q.8.
When cloning animals from adult cells, what must one do to the egg cell to make it start to grow?
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Give it a small electric shock
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Nothing, it will start growing of its own accord
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Drop it in salty water
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Hit it
Q.9.
When cloning mammals from adult cells, after the nucleus has been replaced and growth has started, where must the egg cell be placed so the clone can develop?
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In a test tube with a suitable 'in vitro' solution
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On agar in a Petri dish
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In the uterus of an adult female of the same type of animal
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In the uterus of an adult female of a different type of animal
Q.10.
Another way of cloning animals is by carrying out an embryo transplant. The growing cells of the embryo taken from a pregnant animal can be separated and grown as genetically similar individuals. But at what stage can this be done?
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When the embryo is nearly fully developed
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When the embryo is half way through its development
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When the embryo is growing but before the cells have become specialised
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Immediately after fertilisation of the egg
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