3 (a) Figure 6 shows the bones in the limbs of a bird and a whale - Edexcel - GCSE Biology - Question 3 - 2023 - Paper 1
Question 3
3 (a) 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 th... show full transcript
Worked Solution & Example Answer:3 (a) 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 limbs of the bird and whale have a similar pattern of bones, indicating a common ancestry. This structural similarity suggests that they evolved from a shared ancestor, exhibiting the concept of homology.
Step 2
Which scientist worked with Darwin on the theory of evolution by natural selection?
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Answer
D. Alfred Russel Wallace
Step 3
Suggest one reason why DNA is found in bones.
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Answer
DNA is found in bones because it is essential for the preservation of genetic information, which is important for the identification of individual organisms and for understanding evolutionary relationships.
Step 4
Describe how stem cells help animals to grow.
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Answer
Stem cells help animals to grow by differentiating into various specialized cells that form different tissues and organs. They have the potential to develop into any cell type, which is crucial during growth and development.
Step 5
Name one type of light sensitive cell found in the retina.
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Answer
Cone(s) or rod(s)
Step 6
Explain one reason for transplanting stem cells into the retina.
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Answer
Transplanted stem cells can develop into retinal cells to correct blindness or repair a damaged retina, restoring vision in individuals who suffer from retinal diseases.
