Natural selection Flashcards
DNA
a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live
Nucleotide
in a nucleic-acid chain, a subunit that consists of a sugar, a phosphate,and a nitrogenous base
Chargaff’s Rules
He found that the amount of adenine in DNA always equals the amount of thymine
Watson and Crick
They found out that DNA looks like a long twisted ladder
Rosalind Frank
He helped reveal the structure of the DNA
Mutations
A change in the nucleotide-base sequence of a gene or DNA molecule
Adaption
a characteristic that improves an individual’s 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 Record
a historical sequence of life indicated by fossils found in layers of Earth’s crust
Darwin
english naturalist whose scientific theory of evolution by natural selection became the foundation of modern evolutionary studies
Trait
a genetically determined 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
