Compare which phenotypes each selection pattern favours and predict resulting changes in population variation.
Tę umiejętność sprawdza 8 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Seed width is heritable in a plant population. The curves summarize a change across many generations. Which explanation is consistent with the pattern? A. Stabilizing selection favours only intermediate seeds B. Directional selection favours one extreme and…
Compare and contrast directional selection and disruptive selection acting on a continuously variable trait.
Selection favours two contrasting trait extremes while intermediates leave fewer offspring. What is a likely result? A. Immediate disappearance of all genetic variation B. Stabilization around the original intermediate mean C. Increased phenotypic and…
In a model bird population, intermediate clutch sizes have greater reproductive success than very small or very large clutches. After stabilizing selection acts over many generations, what pattern is expected? A. Intermediate clutches disappear first B. Every…
Which distribution change illustrates stabilizing selection? A. Graph A B. Graph B C. Graph C D. Graph D
In a hypothetical lineage of flying vertebrates, the distribution of adult wingspans shifts over many generations towards larger values. Which selection pattern is consistent with this change? A. Stabilizing selection centred on the original mean B.…
Enzymes, replication and evolutionary processes affect biological systems. (a) Outline, using graphs, effects of factors that influence enzyme activity. (b) Describe the functions of three named enzymes in DNA replication. (c) Explain speciation, including…
Assume this distribution arose through differential survival in a population that previously had most birds with intermediate beak depths. Which type of selection best explains it? A. Stabilizing selection B. Disruptive selection C. Directional selection…
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