Evolution (Edexcel GCSE Biology Combined Science): Flashcards
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Definition of evolution
Definition of evolution
Change in inherited characteristics of a population over time via natural selection
Age of first simple life forms
Age of first simple life forms
More than three billion years ago
Definition of speciation
Definition of speciation
Formation of new species when populations can no longer interbreed to produce fertile offspring
Scientist who proposed natural selection theory
Scientist who proposed natural selection theory
Charles Darwin
Meaning of natural selection
Meaning of natural selection
Survival of the fittest
How antibiotic resistance shows evolution
How antibiotic resistance shows evolution
Resistant bacteria survive, reproduce, pass on resistance allele
Another organism showing resistance evolution
Another organism showing resistance evolution
Rats resistant to warfarin poison
Definition of fossil
Definition of fossil
Trace of plant/animal from thousands of years ago
How fossils evidence evolution
How fossils evidence evolution
Show gradual changes in organisms over time
Source of new alleles
Source of new alleles
Mutation