Flashcards
B6.1 A - The modern theory of evolution
Cards in this deck (11)
- 1What is the modern theory of evolution based on?evidence from the natural world
- 2What is meant by adaptations?Features which help species survive in their environments
- 3What resources to organisms compete for?space, food, water, shelter, mates, light, pollinators, and seed dispensers
- 4Why do organisms have to compete for resources?because they are limited
- 5How do variations within species affect competition?Variations mean an individual can have features that enables it to compete more successfully than others - giving them an advantage
- 6What leads to extinction?If the conditions change too much, no organisms in the population may be able to survive
- 7What causes variation?Mutations in DNA
- 8What causes mutations?substances, radiation, and errors when DNA is copied
- 9What is meant by evolution?Changes in the inherited characteristics of a population over a number of generations
- 10Why are organisms with an advantage more likely to pass on their genes?They are more likely to survive longer, therefore more likely to reproduce, and pass on helpful genetic information to offspring (natural selection)
- 11How do scientists define species?They can breed
Their offspring can breed
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- GCSE Biology (B6 - Life on Earth - past, present, & future ) Flashcards on B6.1 A - The modern theory of evolution, created by lily bevan on 16/03/2018.
- Created by
- lily bevan · Mar 2018
- Updated
- Mar 16, 2018
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