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Kramer, Evolution

Kramer, Chap. 6 Evolution

QuestionAnswer
Any variation that makes an organism better suited to its environment Adaptation
Study of embryos and their development Embryology
Change in inherited characteristics over time Evolution
Model describing evolution as a slow process by which one species changes into a new species through a continuing series of mutations and variations over time Gradualism
Humanlike primate that appeared about 4 million to 6 million years ago, ate both lants and meat, and walked upright on two legs Hominid
Early humans that likely evolved from Cro-Magnons. Homo sapiens
Body parts that are similar in structure and origin and can be similar in function Homologous
A process by which organisms whith traits best suited to their environment are more likely to survive and reproduce; includes concepts of variation, overproduction, and competition Natural selection
Group of mammals, including humans, monkeys, and apes that share characteristics such as opposable thumbs, binocular vision, and flexible shoulders. Primates
Model describing the rapid evolution that occurs when mutation of a few genes results in a species suddenly changing into a new species. Punctuated equilibrium
Element that gives off a steady amount of radiation as it slowly changes to a nonradioactive element. Radioactive element
A type of rock, such as limestone, that is most likely to contain fossils and is formed when layers of sand, silt, clay, or mud are cemented and compacted together. Sedimentary rock
Group of organisms that share similar characteristics and can reproduce among themselves producing fertile offspring Species
Inherited trait that makes an individual different from other members of the same species and results from a mutation in the organism's genes. Variation
Structure, such as the human appendix, that doesn't seem to have a function and may once have functioned in the body of an ancestor. Vestigial structure
Created by: marilyn.kramer
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