a. List the characteristics of chordates. What were the circumstances that forced them to evolve these traits? How did these traits help them to survive the ancient seas? ( b. Vertebrates soon evolved from the chordates. What traits differentiate vertebrat from chordates? How were these traits an improvement on the original chordate body plan? C. Describe what neural crest cells are and their original pur

a. List the characteristics of chordates. What were the circumstances that forced them to evolve these traits? How did these traits help them to survive the ancient seas? ( b. Vertebrates soon evolved from the chordates. What traits differentiate vertebrat from chordates? How were these traits an improvement on the original chordate body plan? C. Describe what neural crest cells are and their original pur

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter51: Animal Development

Section: Chapter Questions

Problem 15TYU

See similar textbooks

Similar questions

. Some groups of animals exhibit cephalisation while others do not and for this reason cephalisation is among the criteria for classification.(a) State two advantages of cephalisation(b) Outline the advancement features of reptiles that enabled themcompletely addapt tolife on land(c) Describe the characteristic features of vertebrates that sets them apart as a unique group of animals
During embryonic development, a neural crest would be found in all of the following chordates, except a. cephalochordates. b. reptiles. c. birds. d. mammals.
In vertebrates, what anatomical structure partially or completely replaces the notochord? 1.) lateral-line system 2.) cartilage or a bony skeleton 3.) endostyle 4.) dorsal hallow nerve cord
(A) Explain clearly the developmental and evolutionary significance of the neural crest within the phylum Chordata
This West Indian manatee (Trichechus manatus) is an aquaticmammal. Like amphibians and reptiles, mammals are tetrapods (vertebrates with four limbs). Explain why manatees areconsidered tetrapods even though they lack hind limbs, andsuggest traits that manatees likely share with leopards andother mammals (see Figure 26.12b). Discuss how early members of the manatee lineage might have differed from today’smanatees.
a. What is Type I and Type II embryogenesis? When did they evolve? Compare the two and give an example an extant (living) organism that follows each one. b. Type III embryogenesis evolved later, during which era? What group of animals follow Type III? Why would this type of embryogenesis evolve?
Describe the evolution of mammals, tracing their synapsid lineage from early amniote ancestors to true mammals. How would you distinguish pelycosaurs, early therapsids, cynodonts, and mammals?
Discuss how humans, as chordates, possess all fourcharacteristics either as embryos or adults.
In 1798, a stuffed platypus specimen was delivered tothe British Museum. Reports that it laid eggs createdmuch confusion. To modern biologists, a platypus isclearly a mammal. It has fur and the females producemilk. Young animals have typical mammalian teeth thatare replaced by hardened pads of the “bill” as the animalmatures. Why do you think modern biologists can moreeasily accept that a mammal can have some reptileliketraits than scientists who were considering this animal inthe late 1700s?
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.
A genetic change that caused a certain Hox gene to be expressedalong the tip of a vertebrate limb bud instead of farther backhelped make possible the evolution of the tetrapod limb.This type of change is illustrative of(A) the influence of environment on development.(B) paedomorphosis.(C) a change in a developmental gene or in its regulation thataltered the spatial organization of body parts.(D) heterochrony
Is a cartilaginous skeleton a homolgy between early gnathostomes and cyclostomes due to their shared ancestry? Explain your reasoning.