Compare allopatric and sympatric pathways and the roles of spatial, behavioural and temporal isolation.
Tę umiejętność sprawdza 10 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Sexual life cycles can produce new combinations of inherited traits. (a) Draw and label a section of an insect-pollinated flower, indicating the structures associated with male and female gamete production. (b) Explain the sources of variation arising through…
Two insect populations become reproductively isolated because they mate on different host plants within the same woodland. Which feature makes this an example of sympatric rather than allopatric speciation? A. Their descendants will necessarily have identical…
A new river channel separates a rodent population. Over many generations, the isolated populations diverge. Which explanation fits? A. Sympatric speciation because the populations remain separated by water B. Allopatric divergence with different selective…
State the mode of speciation illustrated.
Describe how the two species could have arisen from the ancestral population.
Discuss how fragmenting a forest into isolated patches can change population gene pools.
(a) Outline what makes DNA replication semi-conservative. (b) Describe how sexual reproduction generates genetic variation. (c) Explain how isolated populations can become separate species.
Which situation illustrates temporal reproductive isolation between two populations that could otherwise interbreed? A. They use different courtship signals during the same season B. A sea channel separates them throughout the year C. Different pollinators…
Which situation illustrates temporal reproductive isolation between two populations that could otherwise interbreed? A. They use different courtship signals during the same season B. A sea channel separates them throughout the year C. Different pollinators…
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…
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