Zadanie 5c
Explain how competition within a species contributes to natural selection.
Inheritance as a requirement for selection response
Distinguish heritable differences from acquired environmental effects when explaining evolutionary change.
Tę umiejętność sprawdza 13 zadań wzorowanych na arkuszach IB z lat 2022–2026.
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Zadanie 6
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…
Zadanie 6
A health study considers sickle-cell anaemia in a malaria-endemic region of Uganda. Individuals with two sickle-cell alleles may develop severe anaemia; heterozygotes generally lack that severe phenotype and have some protection against malaria. (a) Outline…
Zadanie 7
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…
Zadanie 11b
In a model region, cultivation of herbicide-resistant crops expanded during the period shown. The chart records the cumulative number of weed species reported resistant to that herbicide. Comment on environmental consequences of widespread use of these crops.
- Materiał graficzny
Zadanie 21
A heritable variant that permits adult digestion of a particular dietary sugar becomes more frequent over many generations after that food becomes common. Which explanation is consistent with evolution? A. Eating the food directs every individual to produce…
Zadanie 23
In a stable environment, a heritable trait lowers survival and the number of offspring produced. What does natural selection tend to do over generations? A. Decrease the trait’s frequency B. Ensure that every individual acquires a beneficial mutation C. Pass…
Zadanie 9a
In a hypothetical region, crops resistant to a herbicide H are introduced during the survey period. The graph shows subsequent use and confirmed resistant-weed records. Suggest one reason for the increasing occurrence of resistant weeds.
- Materiał graficzny
Zadanie 7
Inheritance and cell division contribute to biological variation. (a) Draw and label one RNA nucleotide. (b) Distinguish mitosis from meiosis. (c) Explain how natural selection can produce antibiotic resistance in a bacterial population.
Zadanie 7
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.
Zadanie 23
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…
Zadanie 20
A constructed survey finds that pale moths become more frequent after soot deposits on tree bark decline. Which explanation is consistent with natural selection? A. Every dark moth changes its inherited colour in response to cleaner air B. Pale moths become…
Zadanie 21
In a hypothetical island survey, two seed-eating bird populations are recorded alongside an insect-eating population. Which explanation could account for the restricted distribution of the thick-beaked population? Population | Island P | Island Q | Island R |…