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Related Book ReviewsGene -- Genes are the units of heredity in living organisms. They are encoded in the organism's genetic material (usually DNA or RNA), and control the physical development and behavior of the organism. ... > full article Crust (geology) -- In geology, a crust is the outer layer of a planet, part of its lithosphere. Planetary crusts are generally composed of a less dense material than that of its deeper layers. The crust of the Earth is ... > full article Genetic drift -- Genetic drift is the term used in population genetics to refer to the statistical drift over time of gene frequencies in a population due to random sampling effects in the formation of successive ... > full article Microorganism -- A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; ... > full article Prokaryote -- Prokaryotes are organisms without a cell nucleus, or indeed any other membrane-bound organelles, in most cases unicellular (in rare cases, multicellular). This set of characteristics is distinct from ... > full article Natural selection -- Natural selection is the phrase Charles Darwin used in 1859 for the process he proposed to explain the origin of species and their apparent adaptation to their environment. Along with the rules of ... > full article Methane -- The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4.A principal component of natural gas, methane is a significant ... > full article Evolution -- In biology, evolution is the process by which populations of organisms acquire and pass on novel traits from generation to generation. The modern understanding of evolution is based on the theory of ... > full article Timeline of human evolution -- The timeline of human evolution outlines the major events in the development of our species and the evolution of our ... > full article Fossil -- Fossils are the mineralized or otherwise preserved remains or traces (such as footprints) of animals, plants, and other organisms. The totality of fossils and their placement in fossiliferous ... > full article
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