Three methods dating fossils


27-Dec-2017 21:19

allometry: The relation between the size of an organism and the size of any of its parts.For example, an allometric relation exists between brain size and body size, such that (in this case) animals with bigger bodies tend to have bigger brains.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.Species adapt when succeeding generations emphasize beneficial characteristics.Amphibian larvae are aquatic, and have gills for respiration; they undergo metamorphosis to the adult form.

artificial selection: The process by which humans breed animals and cultivate crops to ensure that future generations have specific desirable characteristics.ammonoid: Extinct relatives of cephalopods (squid, octopi, and chambered nautiluses), these mollusks had coiled shells and are found in the fossil record of the Cretaceous period.amniotes: The group of reptiles, birds, and mammals.Allometric relations can be studied during the growth of a single organism, between different organisms within a species, or between organisms in different species. amino acid: The unit molecular building block of proteins, which are chains of amino acids in a certain sequence.

allopatric speciation: Speciation that occurs when two or more populations of a species are geographically isolated from one another sufficiently that they do not interbreed. There are 20 main amino acids in the proteins of living things, and the properties of a protein are determined by its particular amino acid sequence.

amino acid sequence: A series of amino acids, the building blocks of proteins, usually coded for by DNA.



I would rather have been nibbled to death by ducks than to stand in front of a bunch of reluctant 17-year-olds just daring me to teach them grammar. That should take care of those feelings of inadequacy.… continue reading »


Read more

See her posing nude outdoors, somewhere at the Black Sea, on the desert beach.… continue reading »


Read more

Ditch those boring, traditional porn videos, start chatting on the most intimate topics at … continue reading »


Read more

Despite some folks’ good-natured claims to the contrary, Jo Marie insists that Mark is only a friend.… continue reading »


Read more

There are many other stock characters that are popularly known as well, like Mammy and Jezebel.… continue reading »


Read more