Formation of a New Species (Speciation) (Grade 12 NSC Matric Life Sciences): Flashcards
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Speciation definition
Speciation definition
Formation of new species from existing ones
Biological species concept
Biological species concept
Organisms that interbreed to produce fertile offspring
Geographic speciation
Geographic speciation
Speciation via physical separation by geographic barriers
Stage 1 of geographic speciation
Stage 1 of geographic speciation
Initial separation; populations divided but still same species
Stage 2 of geographic speciation - what stops
Stage 2 of geographic speciation - what stops
Gene flow between populations
Stage 3 of geographic speciation
Stage 3 of geographic speciation
Reproductive isolation; cannot interbreed successfully
Time scale of speciation
Time scale of speciation
Thousands to millions of years
What cladograms show
What cladograms show
Species relationships & when speciation events occurred
Branching point in cladogram
Branching point in cladogram
Represents a speciation event
Reproductive isolation
Reproductive isolation
Populations cannot interbreed to produce fertile offspring