Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337670319
Author: STARR
Publisher: Cengage
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Textbook Question
Chapter 18, Problem 5SQ
In a cladogram, each node represents a(n) _______ .
- a. single lineage
- b. extinction
- c. common ancestor
- d. adaptive radiation
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Students have asked these similar questions
Organisms that are closer together on a cladograma. are in the same family.b. comprise an outgroup.c. share a more recent common ancestor than those organisms that are farther apart.d. share fewer derived characters than organisms that are farther apart.
An octopus and an owl both have large eyes with similar structures. If their most recent common ancestor lacked eyes what is the reason for the similarity?
Group of answer choices
a. genetic drift
b. convergent evolution
c. mutation
d. homology
e. gene flow
On a phylogenetic tree, the length of branches is
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c.) The point in evolution when, based on scientific evidence, an ancestor is thought to have diverged to form two new species.
d.) Proportional to the time elapsed since the split.
Chapter 18 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Hawaiian Honeycreeper Phylogeny The po'ouli...Ch. 18 - Prob. 1SQCh. 18 - Which of the following assumptions is not part of...Ch. 18 - Prob. 3SQCh. 18 - Prob. 4SQCh. 18 - In a cladogram, each node represents a(n) _______...Ch. 18 - Constructing a cladogram _______ . a. may involve...
Ch. 18 - In cladograms, sister groups are _______ . a....Ch. 18 - Through ______, a body part of an ancestor is...Ch. 18 - Homologous structures among major groups of...Ch. 18 - Prob. 10SQCh. 18 - Molecular clocks are based on comparisons of the...Ch. 18 - Prob. 12SQCh. 18 - All of the following data types can be used as...Ch. 18 - Choose the statement that is incorrect. a....Ch. 18 - Prob. 15SQCh. 18 - Match the terms with the most suitable...Ch. 18 - In the late 1800s, a biologist studying animal...Ch. 18 - The photos shown above illustrate a case of...Ch. 18 - Bonobas and chimpanzees are sister groups. Humans,...
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- Which assumption of cladistics is stated incorrectly? a. Living things are related by descent from a common ancestor. b. Speciation can produce one, two, or three new species. c. Traits change from one state to another. d. The polarity of a character state change can be determined.arrow_forwardThe pupfishes in the Death Valley region are an example of which evolutionary process? (a) background extinction (b) allopatric speciation (c) sympatric speciation (d) allopolyploidy (e) paedomorphosisarrow_forwardA monophyletic group is a ______. a. phylogenetic tree b. shared derived trait c. character state d. cladearrow_forward
- In evolutionary trees, each node represents an __________. a. single lineage c. divergence b. extinction d. adaptive radiation.arrow_forwardAfter the mass extinction that occurred 65 million years ago, mammals rapidly diversified to occupy habitats that were previously unavailable to them. What concept does this illustrate? A. Adaptive radiation B. Cretaceous selection C. Reproductive isolationD. Heterozygote advantagearrow_forwardWhich factor most likely caused animals and plants in India todiffer greatly from species in nearby southeast Asia?(A) The species became separated by convergent evolution.(B) The climates of the two regions are similar.(C) India is in the process of separating from the rest of Asia.(D) India was a separate continent until 45 million years ago.arrow_forward
- Researchers 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_forwardThe three beetle species live in the same ecosystem, and they likely evolved from the ancestral species that colonized the region. Which statement best explains how descent with modification influenced speciation in these beetles? A. The ancestral species carried neutral gene mutations that spontaneously caused speciation when they colonized the region. B. The ancestral species randomly diverged into three species before colonization and then colonized the regions that best suited their new adaptations. C. After colonization, small groups separated from the rest of the ancestral species and developed different adaptations that helped them survive and reproduce. D. After colonization, the large group interbred until they developed enough neutral genetic mutations for speciation to occur.arrow_forwardWhat is a Homology? A) When an anatomic feature is shared among organisms and their descendants B) When two organisms appear the same C) When convergent evolution produces similar phenotypesarrow_forward
- The Hawaiian silverswords are an excellent example of which evolutionary process? (a) allometry (b) preadaptation (c) microevolution (d) adaptive radiation (e) extinctionarrow_forwardWhales and dolphins evolved from land mammals. Their front legs have become fin-like structures called flukes which help them swim. The similarity in form and function of the flukes of whales and the fins of fishes is an example of...? Group of answer choices a. convergent evoluton b. homology c. neitherarrow_forwardThe bones of a bird’s wing are similar to the bones in a bat’s wing. This observation is an example of_______ . a. uniformitarianism c. comparative morphology b. evolution d. a lineagearrow_forward
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