Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 21, Problem 1CT
Which groups or protists would you be most likely to find as fossils? Why?
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Which group of protists are scientists most likely to find as fossils? Which groups are least likely to be fossilized? Explain your reasoning.
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Chapter 21 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 21 - Summoning Moaquitoes Parasites sometimes alter...Ch. 21 - Prob. 2DAACh. 21 - Prob. 3DAACh. 21 - Prob. 4DAACh. 21 - Prob. 1SQCh. 21 - Diplomonads, and parabasalids lack _______. a. a...Ch. 21 - Radiolaria and diatoms have a shell of _______. a....Ch. 21 - Prob. 4SQCh. 21 - Diatoms produce _______ that help(s) them float....Ch. 21 - Prob. 6SQ
Ch. 21 - ______ are members or the phytoplankton. a. Water...Ch. 21 - Prob. 8SQCh. 21 - Prob. 9SQCh. 21 - Prob. 10SQCh. 21 - Prob. 11SQCh. 21 - Prob. 12SQCh. 21 - Prob. 13SQCh. 21 - Prob. 14SQCh. 21 - Prob. 15SQCh. 21 - Which groups or protists would you be most likely...Ch. 21 - Apicomplexans evolved from a photosynthetic...Ch. 21 - Diplomonads have neither mitochondria nor...
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- Which type of protist shows characteristics that make it difficult to classify as either plant-like or animal-like? 1.Diatom 2.Amoeba 3.Euglenoid 4.Ciliatesarrow_forwardWhy is 'protists' considered a polyphyletic grouping? Why do biologists still use it?arrow_forward1. How is designated the ancestral protist lineage that gives origin to the metazoans? 2. Layout that protist lineage (inform the names of the structures) 3. Wich big philo of metazoa is most related to this protist lineage? 4. What is the main sinapomorphy of this meathozary group? 5. How can the relationship be morphologically proven to the ancestral protist lineage? 6. The feeding of the basal metazoan has characteristics considered plesiomorphic. Indicate the food habit and digestion process of the basal metazoan (I'm sorry, i don't speak english very well)arrow_forward
- Which of the following explains why protists are considered a paraphyletic group? A Protists are prokaryotic. B Protists cannot be a monophyletic group because their morphology and behavior are so variable. C Protists lack a common ancestor. O D The MRCA of the protists also gave rise to plants, animals, and fungi. O E Choices B and D are both correct.arrow_forwardA parasitic protist has been isolated and is on a microscope slide. How could you determine whether it belongs to te Apicomplexans or Excavata supergroup? Look for spores which would indicate Excavata Look for flagella which would indicate Excavata There is no way to distinguish based on structural characteristics. Look for flagella which would indicate Apicomplexansarrow_forwardCompare the phylogenetic tree of protists with the secondary endosymbiosis theory which proposes how photosynthetic protists evolved. Are both reconcilable? Explain.arrow_forward
- If you were to create an evolutionary tree in which amoebas were included within the kingdom of organisms to which they were the most closely related (rather than with protists, where they are currently placed), where would you put them?arrow_forwardYou are given five test tubes, each containing an unknown protist, and your task is to read the description below and match these five protists that you know to the correct test tube. -Paramecium -Pfiesteria (dinoflagellate) -Navicula (diatom) -Plasmodium -Amoeba In test tube 1, you sketch the organism and come up with a picture that looks like the one below. You note the organism appears to be “eating” the smaller microorganism. Chemical analysis of test tube 2 indicates the presence of a chemical that is toxic to fish and humans. In test tube 3, you detect the presence of substantial amounts of silica. Microscopic analysis of organisms in tube 4 reveals the presence of an apicoplast in the organism Microscopic analysis of the contents in tube 5 reveals the presence of one large macronucleus and several small micronuclei in each organism Match the description with the correct protistarrow_forwardwhy is the kingdom protista not a valid group from an evolutionary perspective?arrow_forward
- 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.arrow_forwardAmoeba, Paramecuim, and Spirogyra are diverse. Why, then, are they all classified as protists?arrow_forwardHow would you distinguish protists and members of their kingdoms?arrow_forward
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