Formation of a New Species (Speciation) (Grade 12 NSC Matric Life Sciences): Quizzes
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Practise the questions
10 questions from this quiz
What is speciation?
What is speciation?
Formation of new species from existing ones
What defines a species according to the biological species concept?
What defines a species according to the biological species concept?
Organisms that interbreed & produce fertile young
Which processes create variations needed for speciation?
Which processes create variations needed for speciation?
Sexual reproduction & genetic mutations
What type of speciation is most common in nature?
What type of speciation is most common in nature?
Geographic speciation
Which can act as geographical barriers causing population separation?
Which can act as geographical barriers causing population separation?
Rivers, mountains & oceans
What happens to gene flow during Stage 2 of geographic speciation?
What happens to gene flow during Stage 2 of geographic speciation?
Gene flow completely stops
How long does speciation typically take to complete?
How long does speciation typically take to complete?
Thousands to millions of years
What do branching points on a cladogram represent?
What do branching points on a cladogram represent?
Speciation events
How does natural selection work on geographically separated populations?
How does natural selection work on geographically separated populations?
Independently on each population
What confirms that speciation is complete?
What confirms that speciation is complete?
Populations cannot interbreed for fertile young