CK12 Life Science
Figure 7.8: This tortoise is able to reach leaves high in shrubs with its long neck and curved shell. ( 12 ) Darwin’s Finches Th ...
Figure 7.9: Four of Darwin’s finch species from the Galápagos Islands. The birds came from the same finch ancestor. They evolved ...
Figure 7.10: Charles Darwin presented the Theory of Evolution by Natural Selection in this book. The theories were based on evid ...
Jean-Baptiste Lamarck proposed the idea that evolution occurs. However, Darwin differed with Lamarck on several other points. L ...
Figure 7.11: Darwin’s grandfather had a big influence on Darwin’s ideas by introducing him to artificial selection of dogs and h ...
attracting mates. Most of these traits have been changed through natural selection so they allow a plant, animal, or bacteria to ...
Figure 7.13: Natural selection determines the survival of groups of organisms. Flight as shown in these geese is an evolutionary ...
Figure7.14: Threetypesofselectioncanalterallelefrequencies, causingmicroevolution. The effect of stabilizing selection (1) is to ...
What is natural selection? What is adaptation? What is the difference between an inherited trait and an acquired trait? What wa ...
evolution A process in which something passes by degrees to a different stage, such as a living organism turning into a more adv ...
vestigial structures similarities between embryos of different organisms the same DNA and RNA materials found in all organisms ...
Figure 7.15: Evolution of the horse. Fossil evidence, depicted by the skeletal fragments, demonstrates evolutionary milestones i ...
method works better with some species than others. For example, it is difficult to track the evolution of bacteria from fossils, ...
Figure 7.17: About 40 to 60 million years ago this mosquito and fly were trapped in the gooey stuff, called resin that comes fro ...
Figure 7.18: This device, called a spectrophotometer can be used to measure the level of radioactive decay of certain elements i ...
Figure 7.20: The bones in your arms and hands have the same bone pattern as those in the wings, legs, and feet of the animals pi ...
Figure 7.21: This drawing was made to show the similarities between the embryos of many species. Embryos of many different kinds ...
Similarities Between Molecules and Genomes Molecular Clocks Arguably, some of the most significant evidence of evolution comes f ...
Figure 7.23: Almost all organisms are made from DNA with the same building blocks. The genomes (all of the genes in an organism) ...
Figure7.24: Thisisamapofthegenesonjustoneofthe46humanchromosomes. Similarities and differences between the genomes (the genetic ...
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