Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 28, Problem 2VCQ
Figure 28.21 Which of the following statements about the anatomy of a mollusk is false?
- Mollusks have a radula for grinding food.
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The basic body plan of a mollusk is to have a head, foot, and visceral
mass. In the case of the cephalopods, the foot;
Has become part of the digestive system
Has been modified into a beak
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Has been modified into part of the respiratory system
Which is/are true of the mollusc radula
a toothed structure
is a synapomorphy of Mollusca
is situated in the foregut
present in bivalves
A potential disadvantage of torsion in gastropods:
consumption of feces
more efficient gas exchange
head protection
small body size
Serial repetition of the body parts is most specifically referred to as
O tacky
metamerization
O proglottidism
tagmatization
somaticism
tubiculous
Chapter 28 Solutions
Biology 2e
Ch. 28 - Figure 28.3 Which of the following statements is...Ch. 28 - Figure 28.21 Which of the following statements...Ch. 28 - Figure 28.45 Which of the following statements...Ch. 28 - Mesohyl contains: a polysaccharide gel and dead...Ch. 28 - The large central opening in the parazoan body is...Ch. 28 - Most sponge body plans are slight variations on a...Ch. 28 - Cnidocytes are found in phylum Porifera phylum...Ch. 28 - Cubozoans are polyps medusoids polymorphs spongesCh. 28 - While collecting specimens, a marine biologist...Ch. 28 - Which group of fllatworms are primarily...
Ch. 28 - The rhynchocoel is a. circulatory system...Ch. 28 - Annelids have (a): pseudocoelom true coelom no...Ch. 28 - A mantle and mantle cavity are present in: phylum...Ch. 28 - How does segmentation enhance annelid locomotion?...Ch. 28 - The embryonic development in nematodes can have up...Ch. 28 - The nematode cuticle contains. glucose skin cells...Ch. 28 - Crustaceans are ecdysozoans nematodes arachnids...Ch. 28 - Flies are ___________ . chelicerates hexapods...Ch. 28 - Which of the following is not a key advantage...Ch. 28 - Echinoderms have. triangular symmetry radial...Ch. 28 - The circulatory fluid in echinoderms is blood...Ch. 28 - Which of the following features does not...Ch. 28 - The sister taxon of the Chordata is the. Mollusca...Ch. 28 - Describe the different cell types and their...Ch. 28 - Describe the feeding mechanism of sponges and...Ch. 28 - Explain the function of nematocysts in cnidarians.Ch. 28 - Compare the structural differences between...Ch. 28 - Compare the differences in sexual reproduction...Ch. 28 - How does the tapeworm body plan support widespread...Ch. 28 - Describe the morphology and anatomy of mollusks.Ch. 28 - What are the anatomical differences between...Ch. 28 - How does a change in the circulatory system...Ch. 28 - Enumerate features of Caenoihabditis elegans that...Ch. 28 - What are the different ways in which nematodes can...Ch. 28 - Why are tardigrades essential to recolonizing...Ch. 28 - Describe the various superclasses that phylum...Ch. 28 - Compare and contrast the segmentation seen in...Ch. 28 - How do terrestrial arthropods of the subphylum...Ch. 28 - Describe the different classes of echinoderms...
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- Figure 27.9 Which of the following statements about diploblasts and triploblasts is false? Animals that display radial symmetry are diploblasts. Animals that display bilateral symmetry are triploblasts. The endoderm gives rise to the lining of the digestive tract and the respiratory tract. The mesoderm gives rise to the central nervous system.arrow_forwardFigure 27.6 Which of the following statements is false? Eumetazoans have specialized tissues and parazoans don’t. Lophotrochozoa and Ecdysozoa are both Bilataria. Acoela and Cnidaria both possess radial symmetry. Arthropods are more closely related to nematodes than they are to annelids.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
- Earthworms are segmented animals. All of the following are present on/in most segments of an earthworm except; Vascular tissue reproductive tissue Chetae A coelomarrow_forwardWhat are shared characteristics of all Molluscs? Choose All That Apply visceral mass mantle Omuscular foot exoskeleton a radulaarrow_forwardUnlike the turbellarians earthworms have a complete digestive system. This means that; The earthworms do not have a typical stomach like other animals do The earthworms have a digestive system with only one opening The earthworms feed similar to fungi; by absorbing materials across the body wall The earthworm digestive system has both a mouth and an anusarrow_forward
- 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_forwardYou are trying to identify a living organism which you are observing closely. Which one of the following would convince you that the organism is acoelomate? It responds to food by moving toward it. It is triploblastic. It has bilateral symmetry. It possesses sensory structures at its anterior end. Muscular activity of its digestive system distorts the body wall. The flatworms have a true coelom a pseudocoelom radial symmetry tissues derived from the three basic germ layers (i.e. they are triploblastic) need help with both questions for my HW please thank you!arrow_forwardWrite “yes” or “no” to indicate how certain features distinguish each phylum of multicellular invertebrates. Tissues Radial Bilateral symmetry Protostome development Deuterostome development Sponges Cnidarians Arthropods Nematodes Flatworms Annelids Mollusks Echinodermsarrow_forward
- A unique feature of the gastropods is that they undergo the process of embryonic torsion. This process results in; The spiral shaped shell that gastropods have The gastropod develops retractable antennae the anus being positioned near the head The gastropod foot becomes elongated and pliablearrow_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_forwardAn organism classified in phylum Mollusca that is a predator with tentacles, a brain and complex eyes would be classified into which group? gastropod cephalopod bivalve none of the above Which structure from the list below is made up of specialized cells called cnidocytes? Tentacle Bud mesoglea epidermis (ectoderm) Teste (spermerary) Reproductive polyp Foot Ovary Feeding polyp Gastrovascular cavity Mouth hydrostatic skeleton medusaarrow_forward
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