Explain how corresponding structures, including vertebrate limbs, support descent despite differences in function.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2022–2026.
The limb plans below retain corresponding bones despite their different uses. Which kind of evidence for common ancestry do they illustrate? A. Analogy produced only by the same habitat B. Unrelated structures that happen to perform identical functions C.…
Biologists use inherited similarities and differences to investigate population change and relationships. (a) Describe how homologous structures provide evidence for evolution. (b) Outline the assumptions and use of Hardy–Weinberg calculations in a population…
Penguins are birds and seals are mammals. Both swim using flattened forelimbs with corresponding humerus, radius and ulna bones. Which evolutionary interpretation best explains these observations? A. The swimming specialisations are homologous because the…
Which observations provide evidence for evolutionary change? I. A shared underlying forelimb bone pattern in bats and whales. II. Heritable changes produced by selective breeding of crop plants. III. The claim that every acquired bodily change is automatically…
Which observations can support evolutionary change? I. Heritable changes achieved by selecting crop varieties. II. Successive fossil assemblages with differing organisms. III. Similar underlying limb structures in different vertebrates. A. I only B. II and III…
Evolutionary relationships can be investigated using populations, chromosomes and molecular evidence. (a) Outline how adaptive radiation provides evidence for evolution. (b) Describe polyploidy and its possible role in speciation. (c) Explain how a newly…
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