This diagram is the only figure in C. Darwin's "Origin of Species". The figure was used to explain all of the concepts below except XIV X IX VI VE VI V IV ABCD EF GHIKL O All species are related to another. Extinction is an integral part of the evolutionary process. Mutations in genes account for the introduction of new alleles and genes in a population. Natural selection works over generations to promote structural variation. Several species can arise from a single ancestral species.
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Step 1: The diagram shows a branching pattern, which represents the evolutionary relationships between different species. Show more…
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The diagram is reminiscent of Darwin's sketch showing the branching of evolution. The horizontal axis of the diagram is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. Which combination of ideas is represented in the diagram? - origin of new species and extinction - natural selection and overproduction - origin of new species and mutation - extinction and mutation
Adi S.
Which of the following descriptions of evolution--all of which are acceptable--would have been the most unfamiliar to Darwin? Change in allele frequencies in gene pools Descent with modification The gradual change of a population's heritable traits over generations Populations becoming better adapted to their environments over the course of generations The appearance of new varieties and new species with the passage of time Which of the following ideas of Darwin was strongly influenced by the philosophy of Thomas Malthus? All species are fixed in the form in which they are created Earth changed over the years through a series of catastrophic upheavals The environment is responsible for natural selection Earth is more than 10,000 years old Populations tend to increase at a faster rate than their food supply normally allows.
John N.
Which of the following observations led to Darwin's major inferences? Select all that apply. Select one or more: a. Mutations are the source of all variation. b. Organisms only go extinct when catastrophes occur. c. Members of a population vary in their phenotypes. d. Although organisms can produce huge numbers of offspring, many of these offspring do not survive.
Sri K.
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