Populations & Evolution (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which type of selection maintains the average phenotype by favouring the population mean?
Which type of selection maintains the average phenotype by favouring the population mean?
Stabilising selection
When does stabilising selection typically operate?
When does stabilising selection typically operate?
When environmental conditions remain constant
What is the optimum human birth weight that minimises infant mortality?
What is the optimum human birth weight that minimises infant mortality?
Approximately 3.2kg
When does directional selection occur?
When does directional selection occur?
When environmental conditions change
What happens to resistance allele frequency during antibiotic selection?
What happens to resistance allele frequency during antibiotic selection?
Increases each generation
Which phenotypes does disruptive selection favour?
Which phenotypes does disruptive selection favour?
Both extremes
How common is disruptive selection and what is its evolutionary role?
How common is disruptive selection and what is its evolutionary role?
Least common but most important for change
In coho salmon, which male size has the lowest reproductive success?
In coho salmon, which male size has the lowest reproductive success?
Medium-sized males
By 1895, what percentage of Manchester's peppered moth population was melanic (dark)?
By 1895, what percentage of Manchester's peppered moth population was melanic (dark)?
Approximately 98%
How long did the complete peppered moth population shift take?
How long did the complete peppered moth population shift take?
Approximately 47 years