Ecosystems And Evolution Lesson 4.1 - 4.4 Flashcards
What is speciation?
The process by which new species arise
What is variation in adaptation?
A visible or invisible difference that helps an individual survive
How do adaptations develop?
A result from gradual change in the characteristics within a population over time
What is some evidence of evolution
Palaeontology
Biogeography
Anatomy
Embryology
Molecular biology
Genetics
What was Darwin’s theory
Survival of the fittest and natural selection
What is Lamarks theory?
- New species arise spontaneously from non living matter
- Inheritance of acquired characteristics
What is natural selection?
Organisms with advantageous traits are more likely to survive and reproduce.
What does variation come from
Genetic mutation
What is survival of the fittest?
Natural selection, populations change because some can survive better and pass traits to offspring
What is artificial selection
Population changes because individuals chosen by humans pass on desirable traits
Who developed the hypothesis to explain natural selection
Charles Darwin and Alfred Russel Wallace
What is a homologous structure
Similar structural elements and origin, but have a different function
What is analogous structures
Perform similar functions, but organisms don’t have a common evolutionary
