blog

1) On the voyage of the Beagle (1831-1836)
2) For example, in the grasslands of Argentina there are no rabbits, however, there are rodents that resemble rabbits; these rodents are unrelated to European rabbits but are similar to other rodents in South America.
3) In the herarchial classification system of Linnaeus there is a tactic acknwoedement of relatedness, for example, species belonging to ones genus have more in common with each other than they do with species belonging to another genus
4) Cuvier believed that the discontinuities between fossils in different strata were brought about by catastrophes such as floods which caused the extinction of many species living at a particular time.
5) By contrast, Hutton and subsequently Lyell held that geological processes are slow and subtle but that over prolonged periods of time (millions of years) these can lead to major changes.
6) Implicit in this viewpoint is an age for the earth radically different from the 6,000 years of the biblical creationists.
7) "descent with modification"
8) DNA were not demonstrated until 1892, 1903, 1943, respectively.
9) For example, in the case of human phylogeny both skeletal structure (comparative morphology) and gene structure (molecular biology) indicate that humans are more closely related to chimpanzees than to New World monkeys.
10) One common mistake is believing that species can be arranged on an evolutionary ladder from bacteria through "lower" animals, to "higher" animals and, finally, up to man.
11) Evolution is a change in the gene pool of a population over time.
12) Soot from factories darkened the birch trees the moths landed on. Against a sooty background, birds could see the lighter colored moths better and ate more of them.
13) Larger changes, such as when a new species is formed, are called macroevolution.
14) Evolution is not progress. Populations simply adapt to their current surroundings. They do not necessarily become better in any absolute sense over time.
15) insects

16) Natural selection maintains the linkage disequilibrium between color and pattern alleles in Papilio memnon.
15) In these bats, those lucky enough to find a meal will often share part of it with an unsuccessful bat by regurgitating some blood into the other's mouth.
16)Although Malthus thought famine and poverty natural outcomes, the ultimate reason for those outcomes was divine institution. He believed that such natural outcomes were God's way of preventing man from being lazy.They realized that producing more offspring than can survive establishes a competitive environment among siblings, and that the variation among siblings would produce some individuals with a slightly greater chance of survival.