emergence of terrestrial vertebrates emergence

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• Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

• Evolutionary history of life — Although evidence of early life is scarce and often difficult to interpret, it appears that life appeared on Earth relatively soon (on the geologic time scale) after the planet had cooled enough for liquid water to be present. The dominant theory …   Wikipedia

• animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

• community ecology — Introduction       study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat.       As populations of species interact with one …   Universalium

• History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… …   Wikipedia

• Tertiary Period — Interval of geologic time, 65–1. 8 million years ago. It constitutes the first of the two periods of the Cenozoic Era, the second being the Quaternary. The Tertiary has five subdivisions: (from oldest to youngest) the Paleocene, Eocene, Oligocene …   Universalium

• Biodiversity — Some of the biodiversity of a coral reef …   Wikipedia

• bone — /bohn/, n., v., boned, boning, adv. n. 1. Anat., Zool. a. one of the structures composing the skeleton of a vertebrate. b. the hard connective tissue forming the substance of the skeleton of most vertebrates, composed of a collagen rich organic… …   Universalium

• Bône — /bohn/, n. former name of Annaba. * * * I Rigid connective tissue of vertebrates, consisting of cells embedded in a hard matrix. Bones serve as the body s supporting framework, provide muscle attachment points for movement, protect the internal… …   Universalium

• conservation — conservational, adj. /kon seuhr vay sheuhn/, n. 1. the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights. 2. official supervision of rivers, forests, and other… …   Universalium

• Paleontology — Palaeontology redirects here. For the scientific journal, see Palaeontology (journal). Paleontology studies the entire history of life on Earth. Paleontology (pronounced /ˌpælɪɒnˈtɒlədʒi/; British: palaeontology; from Greek: παλαιός… …   Wikipedia