Concept explainers
To explain: Whether the quandaries described in the previous question even occur.
Introduction: Inheritance is the basis of evolution. Study of the evolution of descendants from common ancestors is called phylogeny. The diagrammatic representation of phylogeny of an organism is termed as a polygenetic tree.
To determine: A group of organisms that interests an individual and find the recent phylogenetic studies of this group and see whether such problems have been encountered.
Introduction: Inheritance is the basis of evolution. Study of the evolution of descendants from common ancestors is called phylogeny. The evolutionary relationship between different organisms and the history of different groups of organisms is depicted by an evolutionary tree.
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Check out a sample textbook solution- Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait? Why is it so important for scientists to distinguish between homologous and analogous characteristics before building phylogenetic trees?arrow_forwardSuppose a new monkey species, Species A, has just been discovered. You are a primatologist, and you are trying to determine its phylogenetic position. You are sure its closest relatives are Species B and Species C, but you want to know which one it is more closely related to or if it is equally closely related to both. You are using Species D, a more distant relative, as the outgroup. You have come up with a list of ten characters you think will be useful in resolving this phylogeny, and you have determined the character state of each species for each character. The character states are: (in image below) Estimate the phylogeny of these taxa by plotting the changes on each of the three possible phylogenies for species A, B, and C and determining which tree requires the fewest evolutionary changes. HINT: First, review the carnivorans problem in Section 4.3 of the Zimmer and Emlen textbook. To solve the above problem, assume the outgroup has the ancestral character state for each…arrow_forwardIt is possible for two different genes to imply different phylogenetic relationships among a group of species. What are the possible reasons for this? If there is only one true history of formation of these species, what might we do in order to determine which (if either) gene accurately portrays that history? Is it possible for both phylogenetic trees to be accurate even if there has been only one history of species divergence?arrow_forward
- What is the difference between a cladogram and a phylogenetic tree? Given a cladogram for a group of species, what additional interpretation is needed to obtain a phylogenetic tree?arrow_forwardDraw a simple phylogenetic tree for two sisters clades with a common ancestor. Each sister clade consists of two taxa. Define the following terms and use to label your diagram: clade, node, branch, common ancestor, and taxon.arrow_forwardBased on this matrix, is my cladogram correctly done? 1.a) What species on the cladogram are endothermic (fully endothermic species only=those that maintain their body temperature only with their metabolism = not sharks for instance)? 1.b) Considering the location and relationship of endotherms on the cladogram, what type of character (homologous, homoplasy: convergence or reversal) do you think endothermy is? try to use specific terminology: character, homologous characters, nom homologous characters, character states (or evolutionary stages of a character), ancestral (plesiomorphic), derived (apomorphic), homoplasy, convergence, reversal....arrow_forward
- Below is an example of a particular kind of phylogenetic tree called a chronogram. Chronoograms are named because the length of the branches represents different lengths of time. Nodes are represented by vertical lines, and branches with horizontal ones. They can be arranged horizontally, with the most recent evolutions on the right. Given this information, the taxa that is most closely related to Dubautia ciliolata c. 529 (highlighted below) is _________________ (make sure to type exactly the same characters, including the numbers; do not italicize).arrow_forwardWould a frame for a hierarchical taxonomic structure inherit attributes and properties from higher levels? For instance, if I was doing a frame for a specific animal like a Peregrine Falcon, would the frame consist of attributes and properties inherited from Falconidae, Falconiformes, Aves, Vertebrata, Chordata and Animalia? What would the frame look like?arrow_forwardDoes this phylogenetic tree represent the same evolutionary relationship between all the taxa? why or why not?arrow_forward
- Based on the past activities about constructing of phylogenetic trees, how do you distinguish characteristics between primitive and derived characteristics? provide and example to your answerarrow_forwardPhylogenetic trees are constructed based on Group of answer choices a. shared ancestral characters b. vestigial characters c. homoplastic characters d. cartoon characters e. shared derived characters f. shady charactersarrow_forwardn which situation would it make sense to use the morphological species concept? When you are able to collect data about how individuals in your study use their habitat, but you are unable to determine if they interbreed When working with fossils from extinct organisms When you only have genetic data about each organism in your study When you are not able to collect data about how individuals in your study use their habitat, but you are able to collect reproductive dataarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning