Biology
12th Edition
ISBN: 9780078024269
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 21, Problem 3TS
Certain protist species cause human diseases the are difficultto treat and are often deadly. How does the evolutionaryrelatedness of humans and protists explain the difficulty of
treating a person infected with a pathogenic protest?
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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.
19) Which of the following statements about protists is true?
Group of answer choices
Protists are a monophyletic group of organisms
All protists are unicellular
All protists are photosynthetic
Some protists have prokaryotic cells
The protist group known as charophytes gave rise to land plants
Why have molecular biologists sequenced the genomes of severalparasitic protists?
Chapter 21 Solutions
Biology
Ch. 21.1 - Prob. 1CYPCh. 21.1 - Prob. 2CYPCh. 21.1 - Prob. 3CYPCh. 21.2 - Prob. 1CYPCh. 21.2 - Prob. 2CYPCh. 21.3 - Prob. 1CYPCh. 21.3 - Which chromalveolates are useful to humans?Ch. 21.3 - Prob. 3CYPCh. 21.4 - Prob. 1CYPCh. 21.4 - Prob. 2CYP
Ch. 21.5 - Prob. 1CYPCh. 21.5 - Prob. 2CYPCh. 21.5 - Prob. 3CYPCh. 21 - Prob. 1BS.1QCCh. 21 - Prob. 1BS.2QCCh. 21 - Prob. 1BS.3QCCh. 21 - Prob. 2BS.1QCCh. 21 - Prob. 2BS.2QCCh. 21 - Prob. 1ACh. 21 - Prob. 2ACh. 21 - Prob. 3ACh. 21 - Prob. 4ACh. 21 - Prob. 5ACh. 21 - Prob. 6ACh. 21 - Prob. 7ACh. 21 - Prob. 8ACh. 21 - Prob. 9ACh. 21 - Prob. 10ACh. 21 - Apicomplexans are responsible for which disease?...Ch. 21 - Prob. 12ACh. 21 - Prob. 13ACh. 21 - Prob. 14ACh. 21 - Prob. 15ACh. 21 - Prob. 1TSCh. 21 - Prob. 2TSCh. 21 - Certain protist species cause human diseases the...Ch. 21 - Prob. 4TS
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- * 0O 100 v Ao you would use to identify this species (what features would you use personally to ID). ^タヘ三 臣ヘ= 5. View the protists blood parasites (Trypanosoma cruzi, Trypanosoma brucei, and Plasmodium vivax). Which of these species is more likely to cause the most human issues (in terms of number of people with the disease)? What is one of the most likely ways to keep from being infected by any of these blood parasites? Explain. 6. What are slime molds? 7. Identify the organisms below. Next to each name you ID the organism as, give 2 features that helped you come to that determination. Name of organism: a. Features used to ID: 771 words English (U.S.) Text Predictions: On DEOL 8. ca上門后 MacBook Air 71 64 000 F4 F5 F6 F8 F2 F3 23 2$ 5. 6. 4. R.arrow_forwardA) A major difference between eukaryotic cells and prokaryotic cells is that eukaryotic cells Group of answer choices exhibit little if any compartmentalization of function are generally smaller than prokaryotic cells have a large degree of internal organization lack organelles have little if any internal organization B) Which of the following statements about protists is false? Group of answer choices Some protists are mixotrophic Certain protists share a common ancestor with land plants Some protists are photosynthetic prokaryotes which are similar to the ancestral chloroplast Protists are a polyphyletic group of organisms that often bear little resemblance to each other Although most protists are unicellular, some protists are multicellular as wellarrow_forwardThe following are actual mutualistic partnerships that involve a protist and a host organism; which is the exception? Trichomonas and humans Cellulose-digesting gut protists and wood-eating termites Protists living in hypersaline /anoxic waters always associated with bacteria Algae and certain foraminiferans Photosynthetic dinoflagellates and reef-building coral animalsarrow_forward
- List some examples of protist diversity. How do different protist groups obtain energy? How do they move? Describe the differences in protist appearancearrow_forwardWhich of these are actual mutualistic partnerships that involve a protist and a host organism?arrow_forwardIt is not always easy to categorize a particular case of symbiosis. Suppose a certain species of snail is always found living on a certaincoral. No one has found evidence that the snail harms the coral, sothe relationship is classified as an example of commensalism. Howwould you go about testing this hypothesis? What kinds of observations might lead to the conclusion that the snail is a parasite, or that ithas a mutualistic relationship with the coral?arrow_forward
- What are some of the criteria and tools biologists might use to assign the different types of protists to monophyletic groups?arrow_forwardWhich of the following is NOT a characteristic of all protists?a. Unicellularb. Cells containing membrane-bounded organellesc. Cells containing a nucleusd. Eukaryoticarrow_forwardWhat are some important benefits and services provided byprotists to Earth’s other organisms?arrow_forward
- Why are the protists considered paraphyletic?arrow_forwardProtists are a group of eukaryotic organisms that are brought together by scientists mostly by convenience. I) What is the relationship between all protists that ties them together? ii) provide an example of a autotrophic and heterotrophic protists group, iii) what is the relationship between the multicellular eukaryotes and the protists?arrow_forwardWhich of the following statements correctly describes how different evolutionary groups obtain resources? O Protists can be heterotrophic or autotrophic O Protists are exclusively heterotrophic O Fungi can be heterotrophic or autotrophic O Plants are exclusively autotrophicarrow_forward
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