Figure 6 shows the bones in the limbs of a bird and a whale - Edexcel - GCSE Biology - Question 3 - 2023 - Paper 1
Question 3
Figure 6 shows the bones in the limbs of a bird and a whale.
(i) The bird and the whale have evolved from a common ancestor.
Give one way the structure of these li... show full transcript
Worked Solution & Example Answer:Figure 6 shows the bones in the limbs of a bird and a whale - Edexcel - GCSE Biology - Question 3 - 2023 - Paper 1
Step 1
Give one way the structure of these limbs provides evidence for this evolution.
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Answer
The bird and whale limbs display a similar pattern of bones, indicating a shared evolutionary ancestor. This similarity suggests that both species adapted their limb structures over time for different functions while retaining a common skeletal framework.
Step 2
Which scientist worked with Darwin on the theory of evolution by natural selection?
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Answer
Alfred Russel Wallace.
Step 3
Suggest one reason why DNA is found in bones.
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Answer
DNA is found in bones as it is essential for the preservation of genetic information necessary for the formation and maintenance of bone tissue.
Step 4
Describe how stem cells help animals to grow.
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Answer
Stem cells contribute to growth in animals by differentiating into various specialized cell types needed for tissue development and repair. They continuously replenish tissues, enabling organisms to grow and heal throughout their lifespan.
Step 5
Name one type of light sensitive cell found in the retina.
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Answer
Cone cells.
Step 6
Explain one reason for transplanting stem cells into the retina.
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Answer
Transplanted stem cells can replace damaged retinal cells, which helps to restore vision and may correct conditions like blindness.
