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 2VCQ
Figure 27.6 Which of the following statements is false?
- Eumetazoans have specialized tissues and parazoans don’t.
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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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- animals in which of the following classes possess adductor muscles, labial palps, and use their gills for both respiration and feeding? -Bivalvia -Cephalopoda -Polyplacophora -Anthozoa -Gastropodaarrow_forwardWhat type of symmetry is seen in the roundworm? Does it exhibit cephalization? Ascaris is a parasite that swims constantly in human intestines. What structure protects the nematode from being digested? View the Trichinella slide. Trichinella is also a parasite. It can infect humans as well as other mammals like pigs, bears, and rodents. If untreated, it can lead to death.What mammal tissue does this roundworm infect?Draw a picture below of the Trichinella as viewed under the microscope. Although not mentioned on the website, if available view the live vinegar eel specimens. If there are no live specimens available, check out this you tube video instead: https://www.youtube.com/watch?v=UnjwvtFvyeQDescribe the movement of the vinegar eels.Do they have a complete or incomplete digestive system?arrow_forwardPlacozoans are structurally simple. They have no mouth, gut, or nervous system and only a few distinct cell types. This simplicity is thought to be secondarily derived, because they have an asymmetrical adult stage. are composed of an upper and lower body surface that sandwiches a layer of contractile fibers. exhibit asexual and sexual reproduction. are sessile filter feeders. are found in tropical and subtropical oceans.arrow_forward
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- Mollusca (clams, abalone, nudibranchs, snails, squid, octopi, etc). Unifying features include shell, mantle, radula, foot, visceral mass Which classes show a loss of the shell. How does the shell benefit an organism, how does the loss of the shell benefit other members of this phylum? Distinguish between polyplacophora, bivalva, gastropoda, and chephalopoda We see the first evolution of a true eye here. Who has it? What are chromatophores? How doe members of this group use them? What other unique defense addaptaions do we see in this group? (warning colors, 2 shells, ink)arrow_forwardAlthough nematode worms and arthropods do not appear related, they, in fact, are. One similarity between these two groups of organisms is/are; They both have a hydrostatic skeleton They both molt They both have a segmented body plan They both have a ventral nerve cord and nerve gangliaarrow_forwardWhich of these organisms is NOT in the clade Lophotrochozoa? Cephalopoda Gastropoda Bivalvia C Platyhelminthes O Myriapodaarrow_forward
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