Natural Flashcards
DNA
a molucule that is present in all living things, that determines info and the traits that a living thing enherits.
Nucleotide
in a nucleic-acid chain, a sub-unit that consists of a sugar, a phosphate, and a nitrogenous
Mutations
a change in the nucleotide-base sequence of a gene or DNA molecule
adaptation
a characteristic that improves an individuals ability to survive and reproduce in a particular enviroment
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 organisms preserved by geological processes.
fossil record
a historical sequence of life indicated by fossils found in layers of the earths crust
trait
a genetically determined characteristic
selective breeding
the human practice of breeding animals or plants thta have certain desired characteristics
natural selection
the process by which individuals that are better adapted to their enviorment survive and reproduce more seccessfully than less well adapted individuals do; a theory to explain the mechanism of evolution
generation time
the period between the birth of one generation and the birth of the next generation
speciation
the formation of new species as a result of evolution
Charraffs rule
DNA from any cell organizm
Watson and Crick
The first two twenteth century boiligists
