natural selection + evolution Flashcards
Inheritance
next generation will have individuals with better adapted variations
Evolution
gradual change in characteristics of a species over time
Fossils
remains of organisms from millions of years ago found in rocks
Fossil records
used by scientists to see how organisms changed over time by arranging them in chronological order
fossil record incomplete because…. 4 reasons
- early life forms were soft bodied, fewer traces
- conditions were rare
- still discovering fossils
- traces often destroyed by geological events - earthquakes
Natural selection
individuals with characteristics that are better adapted to an environment make them have a better chance of survival in their environment
Natural selection
individuals with characteristics are better adapted to an environment make them have a better chance of survival in their environment
Antibiotics
Due to the misuse of antibiotics bacterial resistance to antibiotics is increasing. This means that the bacteria are no longer destroyed by the antibiotics