Natural Selection Flashcards
deoxyribonucleic acid 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
DNA
in a nucleic-acid chain, a subunit that consists of a suger, a phosphate, and a nitrogenous base
Nucleotide
he found the amount of adenine in DNA always equals the amount of thymine and he found that the amount of guanine always equals the amount of cytosine
Chargaff’s Rules
they were able to build a model of DNA by using simple materials from their lab
Watson and Crick
she used a process known as Xray diffraction to make these images for DNA
Rosalind Franklin
a change in the nucleotide-base sequence of a gene or DNA molecule
. Mutations
a characteristic that improves an individual’s ability to survive and reproduce in a particular environment
Adaptation
a group of organisms that are closely related and can mate to produce fertile offspring
Species
the process in which inherited characteristics within a population change over generations such that new species sometimes arise
. Evolution
the remains or physical evidence of an organism preserved by geological processes
. Fossils
an historical sequence of life indicated by fossils found in layers of the earths crust
Fossil Record
Darwin, Charles. A British naturalist of the nineteenth century. He and others developed the theory of evolution. This theory forms the basis for the modern life sciences. Darwin’s most famous books are The Origin of Species and The Descent of Man
Charles Darwin
a genetically determined characteristic
Trait
the human practice of breeding animals or plants that have certain desired characteristics
Selective Breeding
the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution
Natural Selection
