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1. Which of the following is not true of the protists? (a) they are unicellular, colonial, coenocytic, or simple multicellular organisms (b) their cilia and flagella have a 9 + 2 arrangement of microtubules (c) they are prokaryotic, as bacteria and archaea are (d) some are free-living, and some are endosymbionts (e) most are aquatic and live in the ocean or in freshwater ponds
Introduction: Protist is a microscopic organism that falls in the kingdom “Protista”. These have been classified into various categories depending upon their mode of nutrition. They can reproduce both sexually and asexually.
Answer to Problem 1TYU
Correct answer: Protist are not prokaryotic, they are eukaryotic organisms. This statement is not true of the protists. Hence, the correct answer is option (c).
Explanation of Solution
Reason for correct answer:
Protists are eukaryotic organisms with a well-defined nucleus. They have a nuclear membrane that encloses the genetic material. Protists have cilia and flagella with a 9 + 2 arrangement of microtubules. They live in an aquatic habitat. Some of them are free-living, while others are endosymbionts.
Thus, the statement that they are prokaryotic in nature is not true.
Option (c) is given as “they are prokaryotic, as bacteria and archaea are”
Protists are eukaryotic organisms. They are not prokaryotes. Hence, the correct answer is option (c).
Reasons for incorrect answer:
Option (a) is given as, “they are unicellular, colonial, coenocytic, or simple multicellular organisms”.
Protist is a unicellular, colonial, coenocytic or simple multicellular organism. This statement about protists is true. Hence, option (a) is incorrect.
Option (b) is given as “their cilia and flagella have a 9 + 2 arrangement of microtubules”.
Protists have cilia and flagella with a 9 + 2 arrangement of microtubules. This statement about protists is true. Hence, option (b) is incorrect.
Option (d) is given as, “some are free-living, and some are endosymbionts”.
There are different types of protist depending upon their mode of nutrition. Some are free living while others endosymbionts. This statement about protists is true. Hence, option (d) is incorrect.
Option (e) is given as, “most are aquatic and live in the ocean or in freshwater ponds”.
Protists are an aquatic organism. They live in water bodies. This statement about protists is true. Hence, option (e) is incorrect.
Hence, the options (a), (b), (d), and (e) are incorrect.
Protists are eukaryotic, unicellular, colonial, coenocytic organisms.
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Chapter 26 Solutions
Biology (MindTap Course List)
- Microscopic Images Examine the microscopic images of protists below. Note cell shapes, organelles, intracellular structures, locomotory structures and other distinguishing features. The species or taxonomic names are located under each photo. (a) (b) (c) (d) (0) Multicellular algae (top row A-C, left to right) and unicellular algae (D-F): A. Brown kelp (seaweed) Macrocystis B. Red algae Corallina C. Green algae Halimeda incrassata D. Bioluminescence (blue color) from dinoflagellates (flagellated unicellular algae). E. Diatoms (shelled unicellular algae) F. Colonial green algae Volvox (bottom row)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_forwardFungi are (a) eukaryotes and opisthokonts (b) prokaryotes and opisthokonts (c) flagellate and dikaryotic (d) autotrophic eukaryotes (e) heterotrophs with cellulose cell wallsarrow_forward
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Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning