Vocab
What is a mutation?
Any change in the DNA of an organism
Who created the theory of evolution known as natural selection?
Charles Darwin
How does having 2 alleles with the sickle cell mutation affect a red blood cell?
Affects BOTH structure and the function of a red blood cell
When is a population of organisms considered as a new species?
When it no longer interbreeds with other populations
What is evolution?
Gradual change in species over time
What are some ways scientists study evolution?
1. Genetic and physical similarities among species
2. Look at fossils
How does having 1 allele with the sickle cell mutation affect a blood cell?
Affects the structure but not its function
Why did the population of peppered moths in England change from the light variation to the dark variation after the Industrial Revolution?
White moths were well camouflaged in white bark of trees.
When the Industrial revolution began, soot covered trees and white moths were no longer camouflaged
What is natural selection?
Individualos are better adapted to their enviornment are more likely to survive and reproduce than others
Give an example of a mutation in the population
Hornless cows have horned offspring
How does sickle cell anemia affect the blood cells?
Red blood cells become C-shaped
Shortage of red blood cells.
What does the abbreviation mya stand for?
Million years ago.
What is variation?
Any difference between organisms of the same species
When bacteria becomes more and more resistant to antibiotics, what is this called?
Evolution by natural selection
Where did life begin?
The ocean
What is evolve?
How do mutations occur?
Error in the DNA
What was the first evidence that there was life on earth?
Bacteria