The forelimbs of a human, a bat and a whale have the same bone plan but different functions. What does this show?
Answer and explanation
Correct answer: C. They are homologous structures
- Step 1: The same arrangement of bones suggests shared origin. Step 2. Different functions result from adaptation. Answer: homologous structures, common ancestor. Why not the others: analogous structures share a function, not a bone plan.
Practise more Génétique, évolution et immunité.
Free questions with an explanation for every one, and full timed French Baccalaureat mock tests.
More Génétique, évolution et immunité questions
- In a DNA double helix, which base pairs with adenine (A)?
- How many cells result from meiosis of one diploid cell, and what is their chromosome number compared with the parent cell?
- What is produced during transcription, and where does it happen in a human cell?
- Where does translation take place, and what does it produce?
- What is a codon?
- What is an allele?