Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 27, Problem 18RQ
Approximately how many mass extinction events occurred throughout the evolutionary history of animals?
- 3
- 4
- 5
- more than 5
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Which of the mass extinctions appears to have removed the most animal groups? How long ago did this extinction occur?
The number and location of bones within fossilized vertebrate skeletons are similar to those in living vertebrates. Most biologists explain this fact by saying
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had similar needs
had different genes
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Chapter 27 Solutions
Biology 2e
Ch. 27 - Figure 27.5 If a Hox 13 gene in a mouse was...Ch. 27 - Figure 27.6 Which of the following statements is...Ch. 27 - Figure 27.9 Which of the following statements...Ch. 27 - Which of the following is not a feature common to...Ch. 27 - During embryonic development, unique cell layers...Ch. 27 - Which of the following phenotypes would most...Ch. 27 - Which of the following organisms is most likely to...Ch. 27 - Which of the following is not possible? radially...Ch. 27 - An animal whose development is marked by radial...Ch. 27 - Consulting the modern phylogenetic tree of...
Ch. 27 - Which of the following is thought to be the most...Ch. 27 - As with the emergence of the Acoelomorpha phylum,...Ch. 27 - Which of the following periods is the earliest...Ch. 27 - What type of data is primarily used to determine...Ch. 27 - The time between 542-488 million years ago marks...Ch. 27 - Until recent discoveries suggested otherwise,...Ch. 27 - Plant life first appeared on land during which of...Ch. 27 - Approximately how many mass extinction events...Ch. 27 - Why might the evolution of specialized tissues be...Ch. 27 - Describe and give examples of how humans display...Ch. 27 - How have Hox genes contributed to the diversity of...Ch. 27 - Using the following terms, explain what...Ch. 27 - Explain some of the advantages brought about...Ch. 27 - Describe at least two major changes to the animal...Ch. 27 - How is it that morphological data alone might lead...Ch. 27 - Briefly describe at least two theories that...Ch. 27 - How is it that most if not all, of the extant...
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- A principle of biology is that all species (past and present) arerelated by an evolutionary history. Are birds living dinosaurs?arrow_forwardAardvarks, anteaters, and pangolins are only distantly related but are similar in structure and form as a result of (a) homology (b) convergent evolution (c) biogeography (d) vestigial structures (e) artificial selectionarrow_forwardIn evolutionary trees, each node represents an __________. a. single lineage c. divergence b. extinction d. adaptive radiation.arrow_forward
- The similar appearance between elephants and mammoths is likely a product of: convergent evolution divergent evolution artificial selection parallell evolution artificial evolutionarrow_forwardAccording to the fossil record, what did the common ancestors of all tetrapods (four-limbed animals) look like? * Fish Bacteria Land Mammals Reptiles Sign end @ %23 5 6. tab g m shift altarrow_forwardWhat can we say about Homo sapiens? Select one: O a. Originated in Africa, shared a common ancestor with Neanderthals, Denisovans, and most likely descendants from a group related to Homo heildenbergensis O b. Migrated out of Africa, most likely 2 million years ago, hybridized with Homo floresiensis and differentiated from other Homo as the sole species to evolved language. O c. Migrated from Ethiopia 200,000 years ago, hybridized with Denisovans and Neanderthals to later replace them O d. Is the result of hybridization between Neanderthals and Denisovans, only lineage to show bipedalism and posses the largest brain capacity of all Homo O e. A and C are correctarrow_forward
- Which statement is true? Fossils can provide information about when life forms existed. Fossils cannot provide information about life cycles and behaviors. Fossils cannot provide information about relatedness of life forms. Fossils can provide information about the entire evolutionary process of life forms.arrow_forwardEvolution of Whales This is an example of how microevolutionary changes eventually result in the formation of a by macroevolution. 1. How many species are in the diagram? 2. What living animal are whales most closely related to? 3. What happened to whales' closest cousins? Outgroup Masonychia Perissodactyla Gujaratia pakistanensis Wasatchian Diacodexts Homacodon Tylopoda Sulformes Ruminantia Anthracotheres Cebochoerus Hippopotamids Khirtharia Indohyus Cetacea Distantly Related Mammal Extinct Ancestor Group Rhinos, Horses, Tapirs Pigs Cows/Sheep Hippos Extinct Artiodactyl Extinct Whale "Cousin" Modern Whalesarrow_forwardVestigial structures are: structures that were helpful to our ancestors but do not serve any useful purpose under current conditions structures that are only helpful when there is competition for survival structures that are harmful relics of our evolution structures that appear to contradict our understanding of how evolution works O000arrow_forward
- Evolution is the theory that species change over time. According to this theory, new species form from existing species through variation and natural selection. The evolutionary process is very slow and the transformation of one species into another requires thousands of years. Several evidences are used to prove evolution and somehow reconstruct how this process occur: 1.Fossil Records. 2.Homologous Body Structures. 3.Vestigial structures. 4.Similarity of embryo. 5.Geographical evidencearrow_forwardhat I Can Do The evolution of man is one of the most fascinating discussion and discovery in the field of science. Humans as the race that have dominated the Earth and seem to be at the center of it have evolved greatly. Observe the illustration on the left. The common ancestor of the primates like chimpanzees and humans might look like a primitive primate with four limbs on which the forelimbs are used to hang on trees. After some time, the emergence of humans has marked a great change on the history of life on Earth. In your point of view as a senior high school STEM student, are humans still evolving? Provide evidences for your answer.arrow_forwardWhich is a question Lamarck MOST LIKELY would have asked when developing his evolutionary hypothesis? O A. Is evolutionary change the result of survival of the fittest? O B. Can body structures change according to the actions of the organism? O C. Can a small population size increase the rate of evolution? O D. Is artificial selection the basis for evolution? P Type here to search BANG &OLL 10 08 F GH V BNarrow_forward
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