Natural selection Flashcards
DNA
A molecule in all living cells and contains the information that determines the traits that a living thing inherits.
Nucleotide
A sub unit that consists of a sugar, a phosphate and a nitrogenous base.
Mutations
A change in the nucleotide base sequence of a gene or DNA molecule.
Adaptions
A characteristic that improves an individuals ability to survive and reproduce in a particular environment.
Species
A group of organisms that are closely related and can mate to produce fertile offspring.
Evolution
The process in which inherited characteristics within a population change over generations such that new species sometimes arise.
Fossils
The remains or physical evidence of an organism preserved by geological processes.
Fossil records
A historical sequence of life indicated by fossils found in layers of the earths crust.
Trait
A genetically determine characteristic.
Selective breeding
The human practice of breeding animals or plants that have certain desired characteristics.
Natural selection
The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do .
Darwin
Signed up for a 5 year voyage around the world and he studied nature and he made a theory.
Speciation
The formation of new species as a result of evolution.
generation time
Average time between two consecutive generations.
Chargaffs rules
the amount of adenine in DNA always equals the amount of thymine.
