After this introduction of natural selection, Darwin elaborated on the subject with his theory of evolution and his book, On the Origin of Species, published in 1859.His work with Darwin's finches and his ideas on survival of the fittest explained the mechanism of natural selection and how it could lead to a proliferation of many different kinds of organisms. The ability of an organism to pass on its genes to future generations is "fitness of an individual' according to Darwin. A theory by definition is basically a supposition and is hypothetical. According to Darwin's theory of evolution, differences between species may be the result of: 1. the disuse of body structures. 21) According to Darwin's theory of evolution, which of the following is the key factor in evolutionary change? View All. The causes of variation are mainly responsible for evolution. d. a slow, sudden and discontinuous process. 4. Individuals will vary depending on geography. Skip. A review of the evidence for evolution leads to a consideration of Darwin’s proposed mechanism for the evolutionary process. Is Natural Selection purely random chance, or is there design to be understood at various levels? In the same book, Darwin also maintained that all the species have descended from a common genetic pool. According to Darwin's model, evolution can only occur if there is some variation present among the individual members of a population.? View Solution in … Some hundred-fifty years since the publication of On the Origin of Species roiled the deeply intertwined worlds of science and religion, it remains a commonplace to set Charles Darwin’s theory of evolution and the practice of religion, and those who engage either, as polar opposites. 500+ SHARES. According to Darwin, the organic evolution is due to (a) intraspecific competition (b) interspecific competition (c) competition within closely related species (d) reduced feeding efficiency in one species due to the presence of interfering species 500+ VIEWS. It is first presented as applying only to the divergences taking place at the varietal level, with varieties represented by the small lower-case letters within species A–L of a “wide ranging genus”, with the horizontal time coordinates measured in terms of a limited number of generations. According to Darwin, evolution is _____. 2. the transmission of acquired characteristics. Thus, variations in characteristics can be inherited. View on App. Evolution is change in the heritable characteristics of biological populations over successive generations. Do Muslims completely refute Darwin’s theory and evolution? by Nicolas Spencer Brown First published online July 2018. a. a sudden but discontinuous process. But Darwin could not explain it. Charles Darwin is known for his studies in life sciences concerning evolution. Darwin also studied that the birds of Galapagos Island (Darwin’s finches) developed different beaks as per the availability of the food. As environments change, selective pressures shift and favor different adaptations. He concluded that evolution took place over a very long period of time. View Solution in App. In this context, the term Darwinism is also used to emphasize the aspect of natural selection. Please explain in terms of Natural Selection. 5. According to Darwin, evolution is What is Darwin’s Theory of Evolution? According to Charles Darwin, evolution is a very slow and gradual process. a. Scientists have proved one of Charles Darwin's theories of evolution for the first time -- nearly 140 years after his death. Closely related species if compete cannot cause evolution. Update: Which statement best describes the source of this variation among members of a species? 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