Test Your Understanding
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.
Want to see more full solutions like this?
Chapter 26 Solutions
BIOLOGY W/MINDLINK AND MINDTAP
- EVOLUTION LINK Why are the protists considered paraphyletic? Use Figure 26-3 to help explain your answer.arrow_forwardBacteria that cause the disease typhus arc close relatives of bacteria that evolved into __________. a. protists b. protocells c. chioroplasts d. mitochondriaarrow_forwardTest Your Understanding Know and Comprehend 1. The mold that produces penicillin is Penicillium notatum. Penicillium is the name of its (a) genus (b) order (c) family (d) species (e) specific epithetarrow_forward
- What are one of the main traits that make bacteria and archae unique in comparison to protists, fungi, amáinala and plants? - they have RNA -fungi have chitin - they are single called organismos that do not have membrane bound organelles or bucked - they diverged 3 billion years ago from each other - they have glycolysisarrow_forward5. according to _______ hypothesis a multicellular organism originated from a coenocytic protist with several nuclei, which formed boundaries around each nucleusarrow_forwardLet’s say we’ve just found a single-celled organism living in a pond. This organism has a nucleus, a cell wall, a plasma membrane, chloroplasts, and flagella. What domain/kingdom is it probably in? Group of answer choices A. Fungi B. Eubacteria C. Plantae D. Archaea E. Protistaarrow_forward
- A 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_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_forwardYou discover a new multicellular, heterotrophic, eukaryotic organism. What is one characteristic that will allow you to classify this new organism as an animal? Group of answer choices cell walls made of chitin structural proteins multicellular haploid stage in its life cycle cell walls made of cellulose external digestionarrow_forward
- All protists have ____. chloroplasts only nuclei only mitochondria only both nuclei and mitochondria chloroplasts, nuclei, and mitochondriaarrow_forwardKnow and Comprehend 3. Which of the following would not be found in prokaryotic cells? (a) cell wall (b) ribosomes (c) plasma membrane (d) nucleus (e) propeller-like flagellumarrow_forwardTell whether the statement is true or false. 1. The endosymbiont hypothesis state that prokaryotes evolved into eukaryotic cells 2. Eukaryotes contain organelles such as mitochondria and chloroplast 3. Organisms develop by a process known as spontaneous generation 4. Bacteria is an example of prokaryoric cwll 5. Prokaryote is a type of cell that has no nucleus and no cell membrane but has cytoplasmarrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningBiology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning