As we have discussed in class, phylogenies are hypotheses, and can therefore changeover time with new evidence. Relatively recent and strong molecular evidence (thatwe did not discuss in class) suggests that all members of the Subphylum Hexapodaare derived from a common ancestor within the Subphylum Crustacea, as in thecladogram shown below. Given this new information, answer the question below.Note: Don't panic. Some of the names of these groups are new to you (Copepoda,Malacostraca, and Remipedia are all classes or subclasses within the SubphylumCrustacea), but this will not affect your ability to answer this question.MyriapodaCopepoda(Crustacea)Malacostraca(Crustacea)HexapodaRemipedia(Crustacea)If we insisted that all groups must be categorized and named so that taxonomicranks/names always include a single common ancestor and all of its descendants,how would this new evidence change our definition of a hexapod?Hexapoda and Melacostraca would have to be classified as a new SubphylumHexapods would have to be classified into a new phylum, outside of ArthropodaHexapods (insects) would be considered crustaceans.This would not change our definition of a hexapod.

The study of the evolutionary history and links of living species is known as phylogenetics. It…

If we insisted that all groups must be categorized and named so that taxonomic ranks/names always include a single common ancestor and all of its descendants, how would this new evidence change our definition of a hexapod? Hexapoda and Melacostraca would have to be classified as a new Subphylum Hexapods would have to be classified into a new phylum, outside of Arthropoda Hexapods (insects) would be considered crustaceans. This would not change our definition of a hexapod.

If we insisted that all groups must be categorized and named so that taxonomic ranks/names always include a single common ancestor and all of its descendants, how would this new evidence change our definition of a hexapod? Hexapoda and Melacostraca would have to be classified as a new Subphylum Hexapods would have to be classified into a new phylum, outside of Arthropoda Hexapods (insects) would be considered crustaceans. This would not change our definition of a hexapod.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter11: Evidence Of Evolution

Section: Chapter Questions

Problem 1CT

See similar textbooks

Similar questions

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).
Draw a phylogenythat accurately portrays the evolutionary relationships among the organisms listed. Each organism listed should be at the tip of a branch on the tree. Use the internet to discover what type of organisms they are, and refer to the textbook and course notes as you determine the relationships among these organisms. Label the phylogeny with each of the 6 species listed and write on the tree where the following derived traits evolved: specialized tissues, radial symmetry, bilateral symmetry, deuterostomy, protostomy, and ecdysozoan cuticle (the need for an animal to molt in order to grow). Anthopleura xanthogrammica Giant Green Anemone Chondrocladia lyra. harp sponge Diadema antillarum black sea urchin Euphasia superba. Antarctic krill Phrynosoma cornutum. horny toad Taenia saginata. beef tapeworm
What are the ORDER/FAMILYs under Major Cubozoan Taxa? Give their characterictics, distribution, and give 2 example species each order/family.
The following four line drawings are reconstructions of invertebrate fossil. Using your knowledge of the extant invertebrate phyla, please indicate which phylum this species mostly likely belongs to. Support your conclusion by connecting the morphological characteristics of the fossil species with the distinguishing characteristics of the phylum.
How are forams useful for researchers to study changes in ocean temperature over time? What are mixotrophs? What is endosymbiosis and why is it consider to be the source of eukaryotic diversity? Why are we confident this only happens once? What is primary and secondary endosymbiosis? Was there another endosymbiotic event that led to a third lineage? What group of organisms possesses a structure that might suggest this possibility and what is the structure? Why is the structure question different from the ancestor of other plastids? What are diatom blooms and why are they of particular interest to climate change scientists?
When an organism exhibits ____________ growth, its fecundity ________ with age, until senescence. indeterminate, decreases determinate, decreases indeterminate, increases determinate, increases none of the above f you were to construct a phylogeny for all vertebrates in North America, the presence of feathers would be considered ____________ for birds. none of the options are correct homoplastic symplesiomorphic synapomorphic parsimonius
Through the phylogenetic tree of major groups of vertebrates provided below, answer the given table by numbering and naming each node in the diagram. Then list the names of each group and write down the shared characteristic(s) of it. You may add more rows if needed. Node Number (e.g. 1 - Gnasthostomata) Animal Group 1 Animal Group 2 Shared Characteristics of Animal Group 1 & 2
Select clades from the list provided below to show a legitimate evolutionary path that led to the evolution of the blue-headed wrasse. The clades are listed in alphabetical order. Include all clades to which this species belongs. Ignore the clades to which this species does not belong. I started by writing the broadest two clades that apply (see below). Actinopterygii Chondrichthyes Chordata Cyclostomata Gnathostomata Osteichthyes Sarcopterygii Teleostei Tetrapoda Vertebrata
After examining the different specimens, construct a dichotomous key to the different phyla. Construct a dichotomous key to the classes of Subphylum VERTEBRATA; according to observable morphological features. Class Amphibia (specimen: Rhinella marina (toad)), Class Reptilia (specimen: Coura amboinensis (turtle), Hemidactylus (house lizard), Elaphe erythrura (snake)), Class Aves (specimen: Gallus gallus (chicken)), Class Mammalia (specimen: Homo sapiens (human))
Dorothia fossil Aperture:- Chambers:- Periphery:- Pores:- Proloculus:- Septum (last):- Shell:- Suture:- suture. Umbo :- Whorls:- Habitat:- Range:-
This chapter shows a phylogenetic tree for the three domains of life, which is based on DNA sequence data for rRNA and other genes. Which of the following answers concerning the phylogenetic relationships found within this tree is incorrect? View Available Hint(s)for Part A Euryarcheotes are found in the Archaea Diatoms, Tubulinids, and Euglenozoans belong to the domain Eukarya Forams, Fungi, and Chlamydias belong to the domain Eukarya. Spirochetes belong to the domain Bacteria Ciliates, Red Algae, and Plants belong to the domain Eukarya.
Below is a phylogeny depicting the relationship among eight animal species (A to H). Next to the species names are the tooth morphology of each species. For example, species A has prominent molar teeth, thus likely a herbivore. On the other hand, species C has prominent canine teeth, thus likely a carnivore. Which of the following statements is correct? The most recent common ancestor for species A to H is probably a carnivore. The most recent common ancestor for species A to H is probably a herbivore. It is impossible to tell what the main food source is for the most recent common ancestor of species A to H. For species C, D, E, F, G, there are four evolutionary events that lead to the evolution of canine tooth morphology. IF the common ancestor of species C, D, E, F, G is a carnivore, then the molar teeth for species D is a plesiomorphy.