CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
12th Edition
ISBN: 9780136486787
Author: Urry
Publisher: SAVVAS L
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Chapter 33.4, Problem 3CC
MAKE CONNECTIONS Ø Historically, annelids and arthropods were viewed as cosely related because both have body segmentation. Yet DNA sequence data indicate that annelids belong to one dade (Lophotrochozoa) and arthrppods another (Ecdysozoa). Could traditional and molecular hypotheses be tested by studying the Hox genes that control body segmentation (see Concept 21.6)? Explain.
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Answer according to phylogenetic tree for animal phyla
1. Which phyla are radically symmetrical?
2. Which phyla are coelomates?
3. Which phyla are triploblastic? Explain what triplobastic means.
4. Which phyla have segmented bodies and a closed blood system?
5. a) Differentiate between an exoskeleton and endoskeleton.
b) Which phyla have these skeletons?
c) Give one advantage and disadvantage of each of this skeletons
6. Which phylum did not hive rise to any other group of animals?
7. Name one feature of the chordates that make them different from the other phyla
8. What was the common ancestor of all animals?
See attached. 1. Which pair of animals in numbers 1-3 belongs to a common ancestral group? Explain your answer.2. Fossils and anatomical records both provide pieces of evidence of evolution. How do you determine the age of fossils of an Aurorazhdarcho micronyx and an Archeopterix?
Evol question:
If the common ancestor of Cnidarians were an open-ocean jellyfish, what would you infer regarding the evolutionary trends in the relative importance of the polyp and medusa stages?
Chapter 33 Solutions
CAMPBELL BIOLOGY-MASTERING BIO.ACCESS
Ch. 33.1 - Prob. 1CCCh. 33.1 - Prob. 2CCCh. 33.2 - Compare and contrast the polyp and medusa forms of...Ch. 33.2 - VISUAL SKILLS Use the cnidarian life cycle...Ch. 33.2 - MAKE CONNECTIONS Many new animal body plans...Ch. 33.3 - Prob. 1CCCh. 33.3 - Prob. 2CCCh. 33.3 - MAKE CONNECTIONS Explain how the molluscan foot...Ch. 33.4 - Prob. 1CCCh. 33.4 - Describe two adaptations that have enabled insects...
Ch. 33.4 - MAKE CONNECTIONS Historically, annelids and...Ch. 33.5 - Prob. 1CCCh. 33.5 - WHAT IF? The insect Drosophila melanogaster and...Ch. 33.5 - MAKE CONNECTIONS Describe how the features and...Ch. 33 - Lacking tissues and organs, how do soonges...Ch. 33 - Describe the cnidarian body plan and its two major...Ch. 33 - is the lophotrochozoan clade united by unique...Ch. 33 - Describe some ecological roles of nematodes and...Ch. 33 - You've read that echinoderms and chordates are...Ch. 33 - A land snail, a clam and an octopus all share...Ch. 33 - Prob. 2TYUCh. 33 - The water vascular system of echinoderms (A)...Ch. 33 - Prob. 4TYUCh. 33 - In Figure 33.2, which two main clades branch from...Ch. 33 - Prob. 6TYUCh. 33 - Evolution connection Interpret thf data Draw a...Ch. 33 - Prob. 8TYUCh. 33 - Prob. 9TYUCh. 33 - SYNTHESIZE YOUR KNOWLEDGE Colleclively, do these...
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- part i Animal phylogenies based on molecular and morphological characters can be different in regards to the placement of the phylum Platyhelminthes. What is the best explanation for this?choose 1 a. The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom. b. Some Platyhelminthes have a coelom, but others do not and it is difficult to conclude anything about its evolution within the clade. c. Platyhelminthes originated from ancestors with a coelom and have retained it to the present time. d. Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one. e. Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution. part ii If current molecular phylogenies of land plants are correct and to be believed they suggest that. Choose 1 a. the Zygnematales and land plants adapted to the same environmental…arrow_forwardPlease solvearrow_forward. WHAT IF? Suppose ctenophores are basal metazoansand sponges are the sister group of all remaining animals.Under this hypothesis, redraw Figure 32.11 and discusswhether animals with tissues would form a clade.arrow_forward
- Make a phylogenetic tree about: Animalia● Vertebrates● Invertebrates● Porifera● Coelenterata (Cnidaria)● Platyhelminthes● Nematoda● Annelida● Arthropoda● Mollusca● Echinodermata● Hemichordata● Chordata (Label all the synapomorphies and include descriptions and side notes)arrow_forward15. On the tree below, mark the place or places that three tissue layers have evolved in animals. Tissue Lineage Layers Porifera N/A Cnidaria 2. Platyhelminthes 3. Rotifera 3. Annelida 3. Mollusca Nematoda 3 Arthropoda Echinodermata 3. Chordata Is the possession of three tissue layers homologous or convergent among animals?arrow_forwardGQ#14: Tiktaalik and Protarchaeopteryx are examples of transitional forms. In paleontology, what does transitional form mean?arrow_forward
- MAKE CONNECTIONS Many new animal body plansemerged during and after the Cambrian explosion. Incontrast, cnidarians today retain the same diploblastic,radial body plan found in cnidarians 560 million yearsago. Are cnidarians therefore less successful or less “highlyevolved” than other animal groups? Explain.(See Concepts 25.3 and 25.6.)arrow_forward14. Nematode Life Cycle Matching: Match each of the descriptions below with the correct nematode worm species (A-D). Note that some descriptions may not apply to any of the 4 species (in which case just write “none") and some descriptions may apply to multiple worms species (in which case write the letters of all applicable species). (A) Dirofilaria (heartworms) (B) Dracunculus (Guinea worm) (C) Ascaris (D) Hookworms 1. Life cycle includes only a single host 2. The infective stage is a free-living larva that can enter the skin directly 3. On target to become the first parasite-caused human disease to be eradicated 4. Has an arthropod intermediate host 5. Traditional treatment involves winding the female worm around a matchstick 6. Infections can be prevented by not defecating on soill improving sanitation of soil 7. Female lays eggs around the anus of the host 8. Produce microfilaria that circulate in the blood 9. Has multiple larval stages and a snail intermediate host 10. Migrate…arrow_forwardA comb jelly and a jellyfish differ from each other because a ctenophore ___A ___ , while a cnidarian ___B_____. Choices of A: is radially symmetrical has a complete digestive tract is bilaterally symmetrical has an incomplete digestive tract is triploblastic is diploblastic Choices of B: is radially symmetrical has a complete digestive tract is bilaterally symmetrical has an incomplete digestive tract is triploblastic is diploblasticarrow_forward
- I am confused on how to fill this out. Do I look at the polygentic treearrow_forwardTest Your Understanding 8.VISUALIZE Draw a simple cladogram illustrating the evolutionary relationships among extant mammals (marsupials, eutherians, and monotremes). Include the following characters in your cladogram: well-developed placenta, vivipary, endothermy, marsupium, hair.arrow_forwardIt is believed that the coelacanths and lungfish represent a crucial link between other fishes and tetrapods. What is the major feature in these fish in support of this hypothesis? O Like amphibians, they are tied to the water for reproduction. Their fins have skeletal and muscular structures similar to amphibian limbs. They have lungs and are able to breathe air when water is scarce. O They have highly evolved nervous and circulatory systems. They enter a hibernative stage when food is scarce, as many tetrapods do.arrow_forward
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