Distinguish new alleles produced by mutation from new allele combinations produced by sexual reproduction.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2026.
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…
A population of ground beetles varies genetically. Identify one process producing genetic variation.
Which statement correctly distinguishes two sources of heritable variation? A. Mutation can generate new alleles, whereas sexual reproduction reshuffles alleles into new combinations B. Fertilisation prevents offspring from differing genetically C. Meiosis…
Nectar-feeding insects depend on flowering plants and can influence their evolution. (a) Outline links between the properties of glucose and its uses. (b) List human activities that threaten insect pollinators. (c) Explain how natural selection can produce…
A bacterial population becomes less susceptible to an antibiotic after many generations of exposure. (i) State two structural features distinguishing a typical bacterial cell from a typical eukaryotic cell. (ii) Explain how resistance can become common in this…
Bacterial cells express genetic information, and inherited variation can affect survival during antibiotic treatment. (a) Draw and label a single RNA nucleotide. (b) Explain how RNA enables a polypeptide to be assembled during translation. (c) Outline how…
A DNA sequence variant not previously present appears in a population. Which process can create this new allele? A. Producing genetically identical copies without mutation B. A change in a gene’s nucleotide sequence C. Sorting existing alleles into gametes…
A plant population expands mainly through genetically identical clonal offspring. Why might adaptation to a new selective pressure be slower than in a comparable sexually reproducing population? A. Cloning produces little new genetic variation apart from…
Water availability can influence which plants survive in a community. (a) Outline energy flow through a natural community. (b) Explain how natural selection can increase drought resistance in a wild plant population.
Which feature supplies the differences on which natural selection can act? A. Only characteristics acquired through exercise during one lifetime B. The complete absence of differences among individuals C. A guarantee that every organism has a very long…
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