Evolution
- Created by: unknownstruggler
- Created on: 08-05-16 18:15
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- Evolution
- Variation
- Differences that exist between individuals
- Intraspecific variation-Within species
- Interspecific variation-between different species
- Continuous variation
- No distinct categories
- Dis-continuous variation
- Distinct categories
- Causes
- Genetic
- Different version of allelles
- Eye and hair colour
- Environmental
- Differences in climate, lifestyle
- Accents
- Genetic and Environmental
- Genetic factors determine, environmental determine the development
- Height
- Genetic
- Adaptations
- Features that increase chance of survival
- Develop because of evolution by natural selection
- Types of adaptations
- Behavioural
- The way an organism acts to increase chances of survival
- "Play dead"
- "Mating"
- Physiological
- Processes inside the organism to increae chance of survial
- "Hibernation"-conserves energy
- Production of antibiotics
- Anatomical (structural)
- Structural features that increase chance of survival
- Streamline body
- Behavioural
- Darwin's theory
- Organisms produce more offspring than survive
- There's variation in characteristics of members in same species
- Some characteristics are passed from one generation to the next
- individuals best adapted to the environment are more likely to survive
- Some characteristics are passed from one generation to the next
- There's variation in characteristics of members in same species
- Organisms produce more offspring than survive
- Evidence to support evolution
- Fossil record evidence
- Remains of organisms preserved in rocks.
- By arranging them in chronological order you can spot the gradual change in characteristics
- DNA evidence
- All organisms have evolved from common ancestors
- Closely related species evolved to become different species
- Compare the base sequence
- Organisms that evolved from each other more recently the more similarities
- As less time for changes to occur
- Organisms that diverged more recently the more similarities in the primary sequence
- As less time for changes to occur
- Organisms that evolved from each other more recently the more similarities
- All organisms have evolved from common ancestors
- Molecular evidence
- Compare the primary sequence in proteins
- Organisms that diverged more recently the more similarities in the primary sequence
- Fossil record evidence
- Variation
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