Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 27, Problem 3VCQ
Figure 27.9 Which of the following statements about diploblasts and triploblasts is false?
- Animals that display radial symmetry are diploblasts.
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Animals that have true tissues, bilateral symmetry, segmented bodies, and are protostomes are known as:
Arthropods
Cnidarians
Sponges
Chordates
Each of the following is a critical difference between protostomes and deuterostomes except
A. deuterostomes have bilateral symmetry
B. the blastopore becomes the anus in deuterostomes
C. the blastopore becomes the mouth in protostomes
D. protostomes have radial symmetry
Which of the following animal groups is triploblastic, has deuterostome development, and has a digestive system, a nervous system, and an excretory system, but does not have a vertebral column?
the acoelomate flatworms (like the planaria)
the cephalochordates (like the lancelet)
the poriferans (like the calcareous sponges)
the coelenterates (like the jellyfish)
the agnathan fishes (like the sea lamprey)
Chapter 27 Solutions
Biology 2e
Ch. 27 - Figure 27.5 If a Hox 13 gene in a mouse was...Ch. 27 - Figure 27.6 Which of the following statements is...Ch. 27 - Figure 27.9 Which of the following statements...Ch. 27 - Which of the following is not a feature common to...Ch. 27 - During embryonic development, unique cell layers...Ch. 27 - Which of the following phenotypes would most...Ch. 27 - Which of the following organisms is most likely to...Ch. 27 - Which of the following is not possible? radially...Ch. 27 - An animal whose development is marked by radial...Ch. 27 - Consulting the modern phylogenetic tree of...
Ch. 27 - Which of the following is thought to be the most...Ch. 27 - As with the emergence of the Acoelomorpha phylum,...Ch. 27 - Which of the following periods is the earliest...Ch. 27 - What type of data is primarily used to determine...Ch. 27 - The time between 542-488 million years ago marks...Ch. 27 - Until recent discoveries suggested otherwise,...Ch. 27 - Plant life first appeared on land during which of...Ch. 27 - Approximately how many mass extinction events...Ch. 27 - Why might the evolution of specialized tissues be...Ch. 27 - Describe and give examples of how humans display...Ch. 27 - How have Hox genes contributed to the diversity of...Ch. 27 - Using the following terms, explain what...Ch. 27 - Explain some of the advantages brought about...Ch. 27 - Describe at least two major changes to the animal...Ch. 27 - How is it that morphological data alone might lead...Ch. 27 - Briefly describe at least two theories that...Ch. 27 - How is it that most if not all, of the extant...
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- Figure 29.3 Which of the following statements about common features of chordates is true? The dorsal hollow nerve cord is part of the chordate central nervous system. In vertebrate fishes, the pharyngeal slits become the gills. Humans are not chordates because humans do not have a tail. Vertebrates do not have a notochord at any point in their development; instead, they have a vertebral column.arrow_forwardFigure 28.21 Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.arrow_forwardFigure 28.45 Which of the following statements about insects is false? Insects have both dorsal and ventral blood vessels. Insects have spiracles, openings that allow air to enter. The trachea is part of the digestive system. Insects have a developed digestive system with a mouth, crop, and intestine.arrow_forward
- Monotremes include: kangaroos koalas bandicoots platypuses.arrow_forwardWhich of the following animal groups, originating before the Paleozoic Era, is monoblastic, with one embryonic germ layer, but no organized digestive system, nervous system, or circulatory system? the acoelomate flatworms (like the planaria) the agnathan fishes (like the sea lamprey) the cephalochordates (like the lancelet) the urochordates (like the sea squirt) the poriferans (like the sponges)arrow_forwardFigure 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.arrow_forward
- Which of the following is true when you compare yourself to a starfish (also called a sea star, which is an echinoderm)? Group of answer choices None of answers shown are correct. Both you are the starfish are deuterostomes. Both you and the starfish are animals. Both you and the starfish are animals, deuterostomes and bilaterians. Both you and the starfish are bilaterians.arrow_forwardWhich of the following is not a characteristic of all animals? Answers: They are multicellular eukaryotes. They ingest and digest food. They are mobile at some point in their life. They reproduce sexually. They have a coelom. Please explain which one is correct.arrow_forwardWhich of the following has indeterminate development? Echinodermata Nematoda Arthropoda Platyhelminthesarrow_forward
- Which of the following classes includes the only type of echinoderm that has a calyx on a stalk? Echinoidea Holothuroidea Ophiuroidea Asteroidea Crinoideaarrow_forwardThe __________ muscles add flexibility to reptilian lungs enabling them to efficiently expand and contract during respiration. The __________ nervous system controls involuntary responses, such as beating of the heart and expansion and contraction of the lungs. The bones of birds are specially hollowed out to accommodate additional air storage; these bones are known as ________.arrow_forwardwhich of the following features does not distinguish humans as a member of phylum chordata as opposed to other deuterostomes? human embryos exhibit pharyngeal arches in gill suits The human coccyx forms from an embryonic tail A spinal cord runs along an adult humans dorsal side human embryos undergo indeterminate cleavagearrow_forward
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