Which of the following statements is true of evolution? a. evolution does not always progress in one set direction. b. earth's present-day species evolved from older, identical species. c. limited resources discourage the evolution of species. d. all of these

B. Earth's present-day species evolved from older, identical species.

The evolution is the change or modification in the characteristics of a species over genration due to the process of adaptation and natural selection. The statement "Earth's present day species evolved from older, identical species is true about evolution". As, proposed by Darwin evolution is "descent with modification", which means that in a process of evolution species change and give rise to new species over generation. He proposed that newly evolved life forms can be traced back to their common ancestor.

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