Why is the study of biogeography an important tool in explaining how species have evolved? * It shows us the relationship between a species' environment, and how they have evolved It shows us how the DNA has changed from one generation to the next It shows us how the bone structure of organisms has changed over time It shows us how old the Earth is

Why is the study of biogeography an important tool in explaining how species have evolved? * It shows us the relationship between a species' environment, and how they have evolved It shows us how the DNA has changed from one generation to the next It shows us how the bone structure of organisms has changed over time It shows us how old the Earth is

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter18: Organizing Information About Species

Section: Chapter Questions

Problem 6SQ: Through _______, a body part of an ancestor is modified differently in different lines of descent....

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Why is the study of biogeography an important tool in explaining how species have evolved? * It shows us the relationship between a species' environment, and how they have evolved It shows us how the DNA has changed from one generation to the next It shows us how the bone structure of organisms has changed over time It shows us how old the Earth is Ce @ $ % 7 e t d gh #の

Imagine that you have the DNA sequences fromthe intron of a gene in three species called A, B,and C. Species A and B are most closely related,while C is more distantly related. The sequencesof A and B differ by 18 base pairs, A and C differby 26 base pairs, and B and C differ by 28 basepairs. Fossils show that species A and B divergedabout 1.2 Mya, but there is no fossil evidence asto when the most recent common ancestor ofall three species lived. Use the genetic data toestimate that date. What assumptions are youmaking to get this estimate?
WRITE ABOUT A THEME: Organization You have seenmany examples of how form fits function at all levels of thebiological hierarchy. However, we can imagine forms thatwould function better than some forms actually found innature. For example, if the wings of a bird were not formedfrom its forelimbs, such a hypothetical bird could fly yet alsohold objects with its forelimbs. In a short essay (100–150words), use the concept of “evolution as tinkering” to explainwhy there are limits to the functionality of forms in nature.
Perhaps 98 percent to 99 percent of all species that have ever existed areextinct. Nearly all went extinct long before humans arrived on the scene. Whyshould we be concerned about the extinction of organisms today?
The evolutionary history of a group of organisms is called its: a. classification. b. taxonomy. c. phylogeny. d. domain. e. outgroup.
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What is a fossil? * A rock that has turned into biological material over time Remains of an organism that have been turned to rock over time Bones of dead organisms A Walkman cassette player Lenovo @ 23 2$ & 1 2 4. 6. 7 8. 9. tab e r y u a S d. f g k shift C V b alt alt ctri
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Molecular clock techniques are used to O calibrate radiometric clocks measure the genetic distance between two taxa O estimate when two taxa diverged from a common ancestor determine the age of fossils estimate the age of individual plants and animals in a population Previous Page Next Page Submit Quiz 7 of 90 questions saved
n 12 12 of 25 Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography. Sort the following examples into the correct categories. Drag each phrase to the appropriate bin. > View Available Hint(s) Reset Help same genetic code in fireflies and tobacco plants similarities in mammalian forelimbs development of drug resistance in bacteria discovery of transitional forms of horses similarity of endemic island species to nearby mainland species vestigial pelvis in right whales discovery of shells of extinct species the high concentration of marsupial species in Australia biogeography direct observation of evolutionary change fossil record homology P Pearson 12:06 PM EX home um ik T Y U home enter 4. B shift end alt ctrl 144
Recent reconstructions of evolutionary history are often dependenton assigning divergence in terms of changes in amino acid ornucleotide sequences. For example, a comparison of cytochromec shows 10 amino acid differences between humans and dogs,24 differences between humans and moths, and 38 differencesbetween humans and yeast. Such data provide no information asto the absolute times of divergence for humans, dogs, moths, andyeast. How might one calibrate the molecular clock to an absolutetime clock? What problems might one encounter in such acalibration?
Describe six types of fossils and how they form. What presentenvironmental conditions might preserve today’s organisms to formthe fossils of the future?