Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 28.1, Problem 1CS
An Introduction to Protists
Core Skill: Connections Look ahead to Figure 34.3. What kind of mobile, amoeba-shaped cells carry materials within the bodies of the early-diverging animals known as sponges?
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Figure 2 A simplified phylogenetic tree of the six kingdoms
Domains of Life
In 1996, Carl Woese conducted a detailed analysis of living organisms. He revealed
that all organisms could be classified into three distinct groups. TIhese groups, called
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Drag and drop the statements to decide whether they describe Rhizaria, Amoebozoa, or Slime Molds.
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Include plasmodial or cellular types Tubular pseudopodia Use pseudopods to capture food or absorb food particles = Needle-like pseudopodia = Similar to fungi
Include the foraminiferans and radiolarians Parasitic Forms structures called fruiting bodies = Often multinucleated Produce tests made of calcium carbonate
Contain exterior "shells" made of silica
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We discussed two theories of the evolution of multicellularity in the animals, the Colonial Theory and the Syncytial Theory. For each of the two theories, give a brief summary of the theory and describe the characteristics you would expect to find in the protist ancestor proposed by each theory.
Chapter 28 Solutions
Biology
Ch. 28.1 - An Introduction to Protists Core Skill:...Ch. 28.2 - Prob. 1CCCh. 28.2 - Evolution and Relationships Concept Check: How do...Ch. 28.2 - Evolution and Relationships Concept Check: How do...Ch. 28.2 - Prob. 4CCCh. 28.2 - Prob. 5CCCh. 28.3 - Prob. 1EQCh. 28.3 - Prob. 2EQCh. 28.4 - Prob. 1CCCh. 28.4 - Prob. 2CC
Ch. 28.4 - Core Skill: Modeling The goal of this modeling...Ch. 28 - Prob. 1TYCh. 28 - Prob. 2TYCh. 28 - Prob. 3TYCh. 28 - Prob. 4TYCh. 28 - What organisms have tertiary plastids? a. certain...Ch. 28 - What is surprising about mixotrophs? a. They have...Ch. 28 - What advantages do diatoms obtain from sexual...Ch. 28 - What are extrusomes? a. hairs on flagella b....Ch. 28 - Prob. 9TYCh. 28 - Prob. 10TYCh. 28 - Prob. 1CQCh. 28 - Why have molecular biologists sequenced the...Ch. 28 - Core Concept: Science and Society Why are the...Ch. 28 - Prob. 1COQCh. 28 - Prob. 2COQ
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- Describe the morphology of oomycetes. Which protists are known for their cytoplasmic streaming movement? Which protists occasionally resemble tiny snails? What are the shells made of? Which group of protists have elaborate exteriors of glassy silica and are very common in the fossil record? What supergroup do land plants share a common ancestor with? What protists are common in tropical waters and are generally called “seaweeds?” Which of the algaes are the furthest living relatives to land plants? Which algaes are the closest living relatives to land plants? Which protists move using tube-like pseudopodia? Which protist group exhibits similarities to fungi as a result of convergent evolution? Which protist group takes on a slug form when nutrients are hard to come by? What protist group do animals share a common ancestor with? What are the choanoflagellates are believed to resemble? Which group contains at least one type of human parasite? Ecology of…arrow_forwardThe phylogenetic tree in Exercise 1 above shows an outdated relationship between Brachiopoda, Bryozoa, and Mollusca. We now know that: (1) Brachiopoda is more closely related to Mollusca; and (2) Bryozoa forms the sister-group to the clade formed by Brachiopoda+Mollusca. In the space below draw a phylogenetic tree showing the correct interrelationships among the 5 clades listed: Bryozoa: Brachiopoda: Linguliformea: Craniiformea: Rhynchonelliformea: Please include mollusca. Should be 6 classes totalarrow_forwardDNA sequence data for a diplomonad, a euglenid, a plant, and an unidentified protist suggest that the unidentified species is most closely related to the diplomonad. Further studies reveal that the unknown species has fully functional mitochondria. Based on these data, at what point on the phylogenetic tree in Figure 1 did the mystery protist’s lineage probably diverge from other eukaryote lineages? Explain.arrow_forward
- Differentiate the three types of canal systems of sponges as to structure, types of cells, and the pathways of water flow. Canal systems : Ascon Leucon Sycon *Provide Referencesarrow_forwardInstruction: Fill – up the taxonomic account, chemical component of spicule and type of body structure of each poriferan species representatives. Label the visible parts/ observable parts on each species representatives. Taxonomic Account Phylum Class Order Family Scientific Name: Euplectella sp. Common Name: Chemical Component of spicule: Type of Body structure:arrow_forwardWhich group is incorrectly paired with its description?(A) diatoms—important producers in aquatic communities(B) red algae—eukaryotes that acquired plastids by secondaryendosymbiosis(C) apicomplexans—unicellular parasites with intricate life cycles(D) diplomonads—unicellular eukaryotes with modifiedmitochondriaarrow_forward
- Now that you have explored the characteristics of the major groups of thealveolate protist, summarize the synapomorphy(s) that group them together as one clade. What unique features of each group distinguish them from others within the clade?arrow_forwardEVOLUTION LINK Why are the protists considered paraphyletic? Use Figure 26-3 to help explain your answer.arrow_forwardCellular slime molds (a) include Physarum and Phytophthora (b) are more closely related to bacteria than are any other protists (c) are responsible for late blight of potatoes, which led to starvation in Ireland in the 1840s (d) have doublegene fusion (e) form a slug when cells aggregate in response to cyclic AMParrow_forward
- Compare the phylogenetic tree of protists with the secondary endosymbiosis theory which proposes how photosynthetic protists evolved. Are both reconcilable? Explain.arrow_forwardB kingdom Fungi © kingdom Plantae D kingdom Protista 2 A student is building a model showing how living things are organized. Which pair of groups contains the greatest number of organisms? genus and species • G phylum and class (H domain and genus ) domain and kingdom Two different kinds of organisms are as closely related as possible. Which statement is most likely true about the organisms? A) They are in the same genus. B They are in the same species. They share the same DNA.arrow_forwardExplain the concept of - The Amoebozoa ?arrow_forward
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