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A-Level BiologyYear 2019Q13

page 07 13. There are approximately 40 species of birds of paradise in New Guinea, on islands nearby, and in areas of mainland Australia. They are thought to have evolved from a crow-like common ancestor that lived 20 million years ago. The list describes processes that are likely to have contributed to the evolution of the different species. X The food availability on a certain part of one island favoured the survival of male and female individuals with slender curved bills. Y On one island with abundant food choices, females choose mates whose head feathers have elongated plumes. Z Some males and females of a species of crow-like mainland bird were blown by a freak storm to some of the islands. Which row in the table matches processes of evolution with descriptions from the list? Processes of evolution Genetic drift Selection Natural Sexual A X Z Y B Z X Y C Z Y X D Y X Z 14. Which row in the table indicates factors that can all lead to a high rate of evolution? Factor Selection pressure Generation time Gene transfer A high long asexual reproduction B low short horizontal C low long horizontal D high short sexual reproduction [Turn over

Biology A-Level Diagram
Paper Source:NAH_Biology_all_2019.pdf

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Exam Specification Info

This question is part of the UK A-Level Biology syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.

Syllabus levelAdvanced Level (A-Level)
SubjectBiology
Official MarksVariable (2–6 marks)