Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 25, Problem 10TYU
SYNTHESIZE YOUR KNOWLEDGE
These micrographs show one single-celled eukaryote, a tubulinid amoeba, engulfing another, a ciliate. Describe a key feature of eukaryotes suggested by these images, and summarize the role of endosymbiosis in the evolutionary history of the eukaryotes. Are tubulinid amoebas more closely related to all other protists than they are to plants,
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Give an example of a protist that is:(a) a parasite of humans(b) very large and photosynthetic(c) a unicellular species with two flagella and photosynthetic(d) covered in cilia
The following groups of protists will be covered in lecture: Amoebazoa, Excavate-euglena,
Alveolata: ciliates, dinoflagellates, apicomplexan;
Stramenopiles: diatoms and brown algae, and
Plantae: chlorophytes.
How do these organisms compare in their
-general type of nutrition (autotroph, heterotroph),
-ecological roles (parasites, decomposers, importance in
food chains)
-general structures (cell walls, structures that help them
move and feed, single vs multicellular)
-reproduction (asexual, sexual)
-presence or absence of alternation of generations, -
degree of complexity of life cycles
-habitats that they are found in
Jr. Scientist discovers a never-before-classified protist. It contains multinucleated filaments, similar to fungal hyphae however, upon closer examination the cell walls are found to be
composed of cellulose rather than chitin. They do not perform photosynthesis but instead acquire nutrients by way of parasitism or decomposition. Jr. Scientist has likely discovered
a rhizarian
a foraminiferan
an oomycete
a mycetozoan
Chapter 25 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 25.1 - Describe major events in the evolution of early...Ch. 25.1 - Explain why eukaryotes are said to be combination...Ch. 25.1 - Prob. 3CCCh. 25.2 - Summarize the evidence that choanoflagellates are...Ch. 25.2 - MAKE CONNECTlONS Describe how the origin of...Ch. 25.2 - Prob. 3CCCh. 25.3 - Briefly describe the organisms found in each of...Ch. 25.3 - MAKE CONNECTIONS Review Figures 7.2 and 8.5...Ch. 25.3 - Prob. 3CCCh. 25.4 - Justify the claim that photosynthetic protists are...
Ch. 25.4 - Prob. 2CCCh. 25.4 - Prob. 3CCCh. 25 - The oldest fossil eukaryote that can be resolved...Ch. 25 - Prob. 2TYUCh. 25 - Plastids that are surrounded by more than two...Ch. 25 - Prob. 4TYUCh. 25 - Prob. 5TYUCh. 25 - Based on the phylogenetic tree in Figure 25.9,...Ch. 25 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 25 - FOCUS ON EVOLUTION DRAW IT Medical researchers...Ch. 25 - FOCUS ON INTERACTIONS Organisms interact with each...Ch. 25 - SYNTHESIZE YOUR KNOWLEDGE These micrographs show...
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- I don't understand this practice bio question: Despite the fact that modern taxonomists have abandoned the Kingdom Protista, the term "protist" persists in the biological literature. Explain the current meaning of the term protist and give several specific examples.arrow_forwardAlgae are autotrophs and can have photosynthesis, however, evolutionary evidence suggests that plants shared a common ancestor with only green algae and are closest relatives of Charophytes. What evidences support this statement? How an algal cell is different from fungal cells, even if both are eukaryotes? Why slime mold is a protist not a fungus even if it does not have chloroplast?arrow_forwardPlease help to answer and also provide a step-by-step explanation: Movement is a type of response to stimuli. Many unicellular organisms can move in response to chemical changes outside the cell – amoeba exhibits locomotion, paramecium use cilia to get around. Protists such as the Amoeba and the Paramecium are important to our discussion of evolution because of their ability to respond to changes in the environment. These single-celled eukaryotes have this ability because a) their DNA responds to stimuli from the environment, b) they have the same germ cell layers that the Cnidaria have, c) new proteins, located in the cell membrane, have shapes and charge patterns that react to a stimulus by generating an electrical impulse. d) they have a Golgi Apparatus that measures the stimulus from the environment, e) none of these are possible.arrow_forward
- Put a checkmark (1) on the group where each of the following structures are present. Cellular Structures Plantae Animalia FungiProtista Monera 1. Nucleus 2. Nucleoid 3. Nucleolus 4. Ribosomes 5. Golgi Body 6. Endoplasmic reticulum 7. Plasma membrane 8. Centriole 9. Cell wall 10. Chloroplast 11. Mitochondria 12. Cytoplasm 13. Cytoskeleton 14.Pigments 15. DNAarrow_forwardPlease help!arrow_forwardfirst 4 please and its a tablearrow_forward
- Clapter 4. Define and identify properties of biofilms Familiarize yourself with the following structures and what purpose(s) they se o Glycocalyx (both slime layer and capsule) Fimbriae o Flagella, distinguish the different flagella arrangements axial filament sex pili cell wall plasma membrane inclusions ribosomes plasmids nucleoid chromosome o endospores What characteristics distinguish the Domain Archaea and Domain Bacteria? Regarding cellwall hp O o 0 O O 0 0 oarrow_forwardHello! Discuss the adaptations that plants and protists have evolved to invade and manipulate their hosts. ( one example of a plant and one of a protist). Thank youuuarrow_forwardIf you can please help me I will give you ?arrow_forward
- Stuckarrow_forwardA scientist has discovered a new species and is tasked with identifying which of the kingdoms of life the organism might fit. Multicellular with nuclei Presence of a cell wall containing chitin Heterotrophic Non-motile Question options: Fungi Protista Plantae Animalia Protists are a group of organisms that are eukaryotic. However, they are a diverse group, with some of the members of the group having a more recent common ancestor with plants while others have a more recent common ancestor with animals. Algae are protists that are more closely related to plants than any other group. Which characteristics would algae share with plants but NOT with animals? Question options: DNA Ribosomes Chloroplasts Mitochondriaarrow_forwardWe know fungi are eukaryotic (have membrane-bound nucleus and organelles). Explain three unique ways fungi are different from other microbes (algae, protozoans, bacteria and archaea). Compare things like cell walls, cell membranes, morphology, reproduction, life cycles. (Words to use in your answer include chitin, cellulose, peptidoglycan, pseudopeptidoglycan, ergosterol, hopanoids, cholesterol,mycelium, hyphae, multinucleate, multicellular, unicellular, nutritional needs, environmental needs, chemoheterotrophy, saprobes, parasites, free-living, reproductive strategies, spores).arrow_forward
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