Zadanie 4c
Explain the change in spot number in ponds containing no predators.
- Materiał graficzny
Natural selection
Umiejętności w tym dziale
Umiejętności z tego działu sprawdza 51 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 35 z 54 arkuszy w bazie.
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Zadanie 4d
Justify the conclusion that predator treatment affected the guppy population’s spotting pattern.
- Materiał graficzny
Zadanie 4e
Outline conditions required for a natural guppy population to remain in Hardy–Weinberg equilibrium.
- Materiał graficzny
Zadanie 4b
(i) Define intraspecific competition. (ii) Explain how this competition can affect biological fitness over generations.
Zadanie 6c
Explain why repeated outbreaks could increase the frequency of R.
Zadanie 38
Male widowbirds display long tail feathers, whereas females have much shorter tails. Which explanation invokes sexual selection for the male trait? A. Males with more attractive displays leave more offspring because females choose them B. Long tails directly…
Zadanie 38
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…
- Materiał graficzny
Zadanie 38
Which conditions can contribute to natural selection in a population? I. A habitat change that alters relative survival II. Inherited differences in a relevant trait III. Exactly equal reproductive success for every genotype in every generation Choose the…
Zadanie 39
A population is modelled using Hardy–Weinberg equilibrium. Consider these proposed conditions. I. No alleles enter or leave through migration. II. Each genotype has the same expected reproductive success. III. Only a few individuals contribute gametes to the…
Zadanie 39
A population of 2000 individuals is in Hardy–Weinberg equilibrium at a two-allele locus. The recessive homozygote frequency is 9%. How many heterozygotes are expected? Use p + q = 1 and p2 + 2pq + q2 = 1. A. 180 B. 420 C. 840 D. 980