What is radiometric dating of fossils

adaptation: Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment.Also used to describe the process of genetic change within a population, as influenced by natural selection., it is crucial to be able to place the occurrence of hominin fossils in a high-resolution chronological framework.The period around 2 Ma (millions of years ago) in eastern Africa is of particular interest as it is at this time that a more substantial fossil record of the genus is first found.

amino acid sequence: A series of amino acids, the building blocks of proteins, usually coded for by DNA.adaptive landscape: A graph of the average fitness of a population in relation to the frequencies of genotypes in it.Peaks on the landscape correspond to genotypic frequencies at which the average fitness is high, valleys to genotypic frequencies at which the average fitness is low. adaptive logic: A behavior has adaptive logic if it tends to increase the number of offspring that an individual contributes to the next and following generations.adaptive radiation: The diversification, over evolutionary time, of a species or group of species into several different species or subspecies that are typically adapted to different ecological niches (for example, Darwin's finches).The term can also be applied to larger groups of organisms, as in "the adaptive radiation of mammals." adaptive strategies: A mode of coping with competition or environmental conditions on an evolutionary time scale.

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