Humans are members of the phylum chordata. As such they have a notochord. The notochord in humans; Can be found next to their spinal chord Has been lost to evolution entirely and is no longer a part of the human life cycle Becomes part of the brain stem Is an embryological feature which is mostly absorbed by the backbone

Humans are members of the phylum chordata. As such they have a notochord. The notochord in humans; Can be found next to their spinal chord Has been lost to evolution entirely and is no longer a part of the human life cycle Becomes part of the brain stem Is an embryological feature which is mostly absorbed by the backbone

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter29: Vertebrates

Section: Chapter Questions

Problem 1VCQ: Figure 29.3 Which of the following statements about common features of chordates is true? The dorsal...

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An animal whose development is marked by radial cleavage and enterocoely is. a deuterostome an annelid or mollusk either an acoelomate or eucoelomate none of the above
Figure 15.3 Which of the following statements is false? a. Eumetazoa have specialized tissues and Parazoa do not. b. Both acoelomates and pseudocoelomates have a body cavity. c. Chordates are more closely related to echinoderms than to rotifers according to the figure. d. Some animals have radial symmetry, and some animals have bilateral symmetry.
Which of these is not a feature of amphibians?a. dry skin that resists desiccationb. metamorphosis from a swimming form to a land formc. small lungs and a supplemental means of gas exchanged. reproduction in the watere. a single ventricle
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 these is not characteristic of all vertebrates?a. complete digestive systemb. closed circulatory systemc. skin with either scales or feathersd. endoskeleton made of bone or cartilagee. vertebral column
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
Which of these does not pertain to a protostome?a. spiral cleavageb. blastopore is associated with the anusc. coelom, splitting of mesodermd. annelids, arthropods, and molluscse. mouth is associated with first opening
Which of the following is a derived trait of vertebrates? a. Jaws b. A mineralized (bony) skeleton c. Dorsal hollow nerve cord d. Skull and vertebrae e. All of the above
In the animal kingdom today, poikilotherms outnumberhomeotherms by a great margin. Why is poikilothermy asuccessful way of life even though poikilotherms sometimesmust compete successfully with homeotherms to survive?
Figure 15.33 Which of the following statements about common features of chordates is true?a. The dorsal hollow nerve cord is part of the chordate central nervous system.b. In vertebrate fishes, the pharyngeal slits become the gills.c. Humans are not chordates because humans do not have a tail.d. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.
Fill in the blanks w/ synapomorphic, symplesiomorphic, or neither: The presence of brain regionalization is a __ feature of tetrapods relative to conditions in other vertebrates, but is a __ feature of Chordata considered alone. The presence of a post-anal tail, a dorsal hollow nerve cord, a notochord, and external gills are __ features of Chordata, __ features of Urochordates, __ features of (cephalochordates + vertebrates) relative to conditions in other organisms.
EVOLUTION CONNECTION Evolution in insects and vertebrateshas involved the repeated duplication of body segments, followedby fusion of some segments and specialization of their structureand function. In vertebrates, what anatomical features reflectsegmentation?