Nodes on a phylogeny represent the common ancestors of the species at the tips

Nodes on a phylogeny represent the common ancestors

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15. Nodes on a phylogeny represent the common ancestors of the species at the tips of the branches. a.True b.False
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16. What is the scala naturae? 17. What scientific theory are Charles Lyell and James Hutton most closely associated with? 18. Why did it take so long to unite the ideas of Mendel and Darwin? 19. What is the “green revolution” and which prediction has it allowed us to postpone? a.Modern agricultural methods. Thomas Malthus’ prediction regarding population growth increasing much more quickly than resources to support that population. b.Technology allowing us to date radioactive rocks. Theodor Dobzhansky’s hypothesis about how to determine the date of extinction for major groups of organisms. c.The origin of photosynthesis. Marie Curie’s prediction regarding saturation of atmospheric radiation. d.The advent of terrestrial plants. Darwin’s hypothesis regarding extinction of directly competing groups. 20. When newly formed a rock has 64 ug per kg of a radioactive element an ancient sample of the same rock only has 4 ug per kg of that same radioactive element. If the half-life of this element is 100 million years, how old is the ancient rock? 21. Using the diagram below and the provided information, how old is the rock layer labelled with the star?
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