BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 21, Problem 2U
Gaps in the fossil record
a. demonstrate our inability to date geological sediments.
b. are expected since the probability that any organism will fossilize is extremely low.
c. have not been filled in as new fossils have been discovered.
d. weaken the theory of evolution.
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An analysis of a phylogeny that displays data about the fossil record over time reveals all of the following EXCEPT
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This video refers to Denisovans as a “Ghost Lineage.” In fact, Denisovans don’t even have a formal scientific name. What is the physical evidence that anthropologists need to further define and understand the Denisovans?
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A. The fossil record should contain intermediate forms between major taxonomic groups
B. The oldest rock strata are much more likely to contain complex fossils than simple fossils.
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Chapter 21 Solutions
BIOLOGY
Ch. 21.1 - Prob. 1LOCh. 21.1 - Prob. 2LOCh. 21.2 - Prob. 1LOCh. 21.2 - Distinguish between demonstrating that evolution...Ch. 21.3 - Contrast the processes of artificial and natural...Ch. 21.3 - Prob. 2LOCh. 21.4 - Prob. 1LOCh. 21.4 - Prob. 2LOCh. 21.4 - Prob. 3LOCh. 21.5 - Explain the evolutionary significance of...
Ch. 21.5 - Prob. 2LOCh. 21.6 - Prob. 1LOCh. 21.6 - Prob. 2LOCh. 21.7 - Characterize the criticisms of evolutionary theory...Ch. 21.7 - Prob. 2LOCh. 21 - Suppose that a male with a beak depth of 10 mm...Ch. 21 - Prob. 1IQCh. 21 - Prob. 2IQCh. 21 - Prob. 3IQCh. 21 - Why might the evolutionary line leading to...Ch. 21 - Artificial selection is different from natural...Ch. 21 - Gaps in the fossil record a. demonstrate our...Ch. 21 - The evolution of modern horses (Equus) is best...Ch. 21 - Homologous structures a. are structures in two or...Ch. 21 - Convergent evolution a. is an example of...Ch. 21 - Prob. 6UCh. 21 - The possession of fine fur in 5-month human...Ch. 21 - In Darwins finches, a. occurrence of wet and dry...Ch. 21 - Prob. 2ACh. 21 - Convergent evolution is often seen among species...Ch. 21 - What conditions are necessary for evolution by...Ch. 21 - Explain how data shown in figure 21.2a and b...Ch. 21 - Prob. 3SCh. 21 - Refer to figure 21.5, artificial selection in the...Ch. 21 - The ancestor of horses was a small, many-toed...
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- Fossils that serve as transitional links allow scientists toa. determine how prehistoric animals interacted with each other.b. deduce the order in which various groups of animals arose.c. relate climate change to evolutionary trends.d. determine why evolutionary changes occur.arrow_forwardThe fossil record provides evidence for: A.When organisms lived on earth B. How some species have gone extinct C.How species evolved D. All of the abovearrow_forwardAll the following statements support the theory that similar organisms have a common ancestor except Select one: a. similar DNA patterns occur in closely related organisms b. organisms sharing a habitat tend to develop similar behaviours c. transitional fossils show links between groups of organisms d. groups of organisms display similar embryonic developmentarrow_forward
- Which of the following is a prediction that evolution makes about the fossil record? Group of answer choices A. fossils of all time periods should be completely different from modern organisms B. most recent fossils should be most similar to modern life C. cats should appear in all fossil layers as rulers of the earth D. oldest fossils should be most similar to modern lifearrow_forwardIf the replacment (out-of-Africa) model is correct, thena. human fossils in China after 100,000 years bp would not beexpected to resemble earlier fossils.b. human fossils in China after 100,000 years bp would beexpected to resemble earlier fossils.c. humans did not migrate out of Africa.d. Both b and c are correct.e. Both a and c are correct.arrow_forwardThe evidence supporting biological evolution includes A. all of the above B. patterns of embryological development C. sharing of charactoristics between organisms D. fossil recordarrow_forward
- A. The principle that human biology and culture evolved together and are intertwined makes anthropologists refer to humans as: a. biocultural organisms. b. an holistic species. c. human agents. d. co-specific organisms. B. Oldowan tools can be described as a. exceptionally small flint tools used in making other tools. b. polished, ground stone tools that look like teardrops. c. thin, symmetrical tools made from stone, bone, and antler. d. tennis ball sized rocks with a few flakes knocked off.arrow_forwardResearchers have found fossils of Eocene horse species in Colorado. Deeper deposits contain smaller species, and more recent deposits contain larger species. How does this observation support the theory of evolution? A. It provides evidence that species change over time. B. It does not support the theory of evolution. C. It shows that all species are related to each other. D. It proves that environments have changed over time. E. It suggests that species are unchanging and of recent origin.arrow_forwardGiven the sources of evidence, explain precisely how it supports evolution. B. Fossilarrow_forward
- Which of the following is NOT true for relative dating methods: A. Relies on observational skills B. Includes stratigraphy which is based on ordered layers that build up over time C. Determines if one artifact or fossil is older than another D. Gives you specific dates of the artifact or fossilarrow_forwarda. What did Darwin's travels reveal to him about the number and variety of living species? b. How did tortoises and birds differ among the islands of the Galapagos? c. What is evolution? Why is referred to as a theory? d. Darwin found fossils of many organisms that were different from any living species. How would this finding has affecting his understanding of lifes diversity?arrow_forwardfemur shown above are In humans, the pelvis and femur, or thigh bone, are involved in walking. In wh a. examples of fossils. b. vestigial structures. WITH Fossil A- Pelvis Femur c. acquired traits. d. examples of natural variation. a. vestigial structures b. analogous structures == Fossil B TERED VERS Fossil C 72 3 Which conclusion is best supported by the information in the diagram? a. Volcanic eruptions were common in the area. b. The area was once a marine environment. c. Organisms in the area reproduced frequently. d. Consumers once outnumbered producers in the area. 0. Structures that have similar functions in two organisms that have not evolv a common ancestral form are called c. adaptations d. homologous structure a. True 1. In natural selection, populations change but individuals do not.arrow_forward
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