Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 32, Problem 7TYU
There is some evidence that pharyngeal slits occur in certain species of echinoderms that appear early in the fossil record. If confirmed, what do these data suggest?
a. Echinoderms are chordates.
b. Pharyngeal slits were present in the earliest echinoderms and lost later.
c. Some lineages of echinoderms are more closely related to chordates than others.
d. Pharyngeal slits should not be used as a trait in phylogenetic analysis.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
You are confronted with two creatures that, on first glance, both appear to be pill bugs. Upon
closer examination, however, you note a difference that allows you to identify one specimen as a
pill bug (an isopod crustacean) and the other as a pill millipede (a myriapod). That key
characteristic is...
A. The presence of an exoskeleton
B. The presence of mandibles
C. The presence of antennae
D. The presence of branched appendages
E. None of the characteristics listed above would allow an isopod crustacean to be distinguished
from a myriapod
Which of the following list places the important evolutionary innovations in the correct order of appearance in the chordate phylogeny?
a.
Vertebrae - bony skeleton - notochord - jaws - internal nares - lobe fins
b.
Jaws - notochord - bony skeleton - vertebrae - lobe fins - internal nares
c.
Notochord - jaws - vertebrae - internal nares - lobe fins - bony skeleton
d.
Notochord - vertebrae - jaws - bony skeleton - lobe fins - internal nares
Which of the following features does not distinguish humans as a member of phylum Chordata? a. Human embryos undergo indeterminate cleavage. b. A spinal cord runs along an adult human’s dorsal side. c. Human embryos exhibit pharyngeal arches and gill slits. d. The human coccyx forms from an embryonic tail.
Chapter 32 Solutions
Biological Science (7th Edition)
Ch. 32 - 2. What trait(s) define(s) the vertebrates?
a....Ch. 32 - Most species of hominins are known only from...Ch. 32 - 7. There is some evidence that pharyngeal slits...Ch. 32 - 9. Consider the evolution of protostomes (Chapter...Ch. 32 - Prob. 11PIATCh. 32 - Evolution often results in the co-option of a...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the closest common ancestor of the Allosaurus and Aves? A. Maniraptora B. Theropoda C. Dramaeosauridae D. Dinosauriaarrow_forwardWhat are two anatomical traits that are different between Adapoids and Omomyoids? A. An ear tube/ ear ring and small/ large eyes B. There are no traits that are different between them C. Postorbital bar/ Postorbital plate and small/ large eyes D. Tail/ No tail and Nails/ Clawsarrow_forwardWhat is one anatomical trait that is present in both Adapoids and Omomyoids? A. A bony ear tube B. Very large eyes C. Postorbital bar D. A large body sizearrow_forward
- According to "Our Earliest Ancestors", what is the main physical feature on Sahelanthropus tchadensis that indicates it was a biped? A.The non-divergent big toe B.The angle of the femur C.The shape of the hips D.The foramen magnumarrow_forwardAccording to "Our Earliest Ancestors", what is unique about the specimen Ardi? A.She had a long, bony tail. B.All of the bones in her skeleton indicated she walked upright all of the time, just like us. C.Ardi had a divergent big toe (like chimps) but femurs and hips that indicate she walked upright occassionally. D.Her skeleton was the largest ever found and she likely was over 8 feet tall.arrow_forward30. Class Aves evolved from Jurassic dinosaurs belonging to which of the following chordate groups? A. Class Chondrichthyes B. Class Reptilia C. Class Osteichthyes D. Class Agnatha E. Class Mammaliaarrow_forward
- Which group of echinoderms usually posses pentameric antimeres but some species may have more? A. Asteroidea B. Echinoidea C. Holothuroidea D. Crinoidsarrow_forwardTarsiers are strange creatures. They seem to share some traits with the more primitive prosimians, and others with the more advanced anthropoids.a. Name one cranial trait that Tarsiers share with prosimians. b. Name one cranial trait that Tarsiers share with anthropoids.arrow_forwardMatch the benefit to the correct chordate adaptation. (match each number to the correct letter) 1. allows organisms to walk on land 2. allows organisms to lay eggs on land, without water 3. allows organisms to generate their own heat 4. provides a rigid structure for muscles A.bony skeleton B. Ectotherm C. Tetrapod D. Amniotic eggs E. Endotherm F. Seedsarrow_forward
- The earliest-diverging gnathostomes (jawed vertebrates) were fish. Which one of the following statements about the characteristics of different groups of modern jawed fish is INCORRECT? a. Ray-finned fish possess a bony skeleton and an operculum covers the gills. b. Cartilaginous fish are denser than water and maintain buoyancy using fins and a large oil-filled liver. c. Lobe-finned fish such as dipnoi possess both gills and lungs. d. Ray-finned fish possess fins supported by skeletal extensions of the pectoral and pelvic areas and moved by muscles. e. Cartilaginous fish possess flexible cartilage skeletons, which is a derived character.arrow_forwardHagfish, lampreys, sharks, and tuna are all chordates that can also be classified into which group? a. Craniates b. Vertebrates c. Cartilaginous fish d. Cephalocordataarrow_forwardPharyngeal slits are which of the following? Question 24 options: a) Openings in the pharynx. In aquatic chordates they allow for exit of water that enters the mouth. b) Elongations of the posterior portion of the body. Use for locomotion in fish, or balance in some terrestrial vertebrates. c) Flexible, rod-shaped structures that grows from mesoderm. Gives support to an animal in embryonic development of chordates or for entire life depending on the species. d) Tissues that produces thyroid type hormones. e) Hollow tubes that develops from ectoderm. Develops into the central nervous system.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license