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#species divergence

3 public questions tagged with this topic.

Genetics and Cell Biology

The rate of substitutions in a certain region of DNA of length 1000 bases is estimated as 10 ⁻⁹ per base per year. If tw

This outcome reflects nucleic acid structure and recombination, where hairpin formation, Holliday junction resolution and translation control ensure fidelity. Option B captures this correctly because it matches molecular mechanisms, consistent with textbook descriptions and experimental observations in molecular biology.

Ref: Alberts et al., Molecular Biology of the Cell, 6th Edition, Chapter 5, DNA Replication and Repair, discusses Holliday junction formation during homologous recombination and replication fork dynamics ensuring genome duplication.

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Basic Evolution

Adaptive radiation involves:

Adaptive radiation describes rapid diversification of single ancestor into many forms exploiting different ecological niches, driven by ecological opportunity, such as Darwin's finches evolving varied beaks for seeds, insects and cactus, or cichlids in African lakes. It involves divergent evolution, morphological innovation and often occurs after colonization or mass extinction. Homologous structures reflect common ancestry. Classic example illustrates Single lineage diversifying as diversification from common ancestor into distinct niches. This concept integrates genetics, ecology and molecul

Ref: Campbell Biology, Evolution Chapters, Selection Types.

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CEP RP CD

Sympatric species character displacement causes:

“Decreased similarity” for sympatric species character displacement causes. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Niche differentiation reduces overlap by separating species along resource, space, or time axes. Such partitioning can stabilize coexistence when each species performs relatively better under the conditions it uses most strongly. The remaining alternatives—“Increased similarity”, “No similarity change”, “Competition extinction”—refer to different states, processes, or scales

Ref: Ecology: Concepts and Applications, Molles, 9th Ed., Ch. 13

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