Multicelled haploid and diploid bodies form in protists that have a(n) __________.
- a. haploid-dominant life cycle
- b. diploid-dominant life cycle
- c. c alternation of generations
Concept introduction: Protists are a diverse taxonomic group of eukaryotic organisms that are unicellular, sometimes colonial, or less often, multi-cellular; it includes protozoans, most algae, and often some fungi. Some protists have a cycle dominated by haploid forms and some protists have a cycle dominated by diploid forms.
Answer to Problem 1SQ
Correct answer: Multi-celled haploid and diploid bodies form in protists that have an alternation of generations. Therefore, option c. is correct.
Explanation of Solution
Reason for the correct statement:
Protists reproduce asexually when the conditions favor their growth. They switch to sexual reproduction when they do not. Multi-cellular algae and all plants have an alternation of generations. In the alternation of generations, both haploid and diploid bodies will form.
Option c. is given as “alternation of generations”. As the multi-celled haploid and diploid bodies form in protists, they have an alternation of generations. Hence, option c. is the correct answer.
Reasons for the incorrect statements:
Option a. is given as “haploid-dominant life cycle”.
Multi-celled haploid and diploid bodies formed in protists do not have a haploid-dominant life cycle. Therefore, option a. is incorrect.
Option b. is given as “diploid-dominant life cycle”.
Multi-celled haploid and diploid bodies formed in protists do not have a diploid-dominant life cycle. Therefore, option b. is correct.
Hence, options a. and b. are incorrect.
Want to see more full solutions like this?
Chapter 21 Solutions
Bundle: Biology: The Unity and Diversity of Life, 14th + LMS Integrated for MindTap Biology, 1 term (6 months) Printed Access Card
- The haploid genome of Toxoplasma gondii has 14 chromosomes. When an oocyst changes into a sporozoite, its nucleus contains Select one: a. 7 chromosomes b. 42 chromosomes c. 28 chromosomes d. 14 chromosomesarrow_forwardSpores released from a mushroom’s gills are_____ . a. flagellated c. dikaryotic b. produced by mitosis d. haploidarrow_forwardAll protozoan pathogens have a _____________phase.a. cyst b. sexual c. trophozoited. bloodarrow_forward
- Protists with the capabilities to perform photosynthesis and to absorb nutrients from dead organisms are called ______________. a. photoautotrophs b. mixotrophs c. saprobes d. heterotrophsarrow_forwardMitosis and cytoplasmic division function in ______ a. asexual reproduction of unicellular eukaryotes b. Gamete formation in prokaryotes c. Growth and tissue repair in multi – cellular organisms. d. Both a and carrow_forwardWhich of the following is NOT an example of a fungal spore? A. Zoospores B. Condia C. Endospore D. Basidiosporesarrow_forward
- Slime molds/moulds or mycetozoans is a broad term that applies to many fungus-like protists. a. In what sense is it appropriate to describe slime molds as “fungus animal”? b. Elaborate on the evolution of the slime molds into two distinct groups.arrow_forwardA scientist is interested in genetically engineering a fungus to hinder its reproductive process so that it does not spread fast. Which process should be disrupted to hinder fungal reproduction? A. Mycelium formation B. Nutrient absorption C. Septa formation D. Spore formation E. None of thesearrow_forwardFind the large nucleus located near the cell. Make several outline drawings to illustrate the successive changes of 1. shape of the amoeba. Make drawings of the Amoeba you observe, and label its structures. C O O liko mer 0 AS 6 0 O Paramecium -- Paramecia are quite large, straw-colored, slipper-shaped and move rapidly, and they are thus very noticeable. If there are Paramecia in your field of view you probably will recognize them immediately. Often, however, students do have difficulty both finding a Paramecium, and after they have found one, making it move slowly enough so they can study it at high magnification. The trick to finding a Paramecium is to scan the entire slide quickly using the scanning lens. Then, if you do not find one, make a new slide and search again. Often, Paramecia tend to move to the edges of the coverslip, and even "escape" the coverslip at its edges. The trick to slowing the Paramecia is to mix a drop of methyl cellulose with a drop of the cell culture, as…arrow_forward
- 25. Which of the following is the protein strip found underneath cell membrane in protists? A. Cell wall B. Cilia C. Flagella D. Pellicle E. Ribosomes 26. The majority of protists are motile. A. True B. False 27. Which of the following is a sexual reproduction mechanism found in protists? A. Binary fission B. Budding C. Meiosis D. Multiple fission E. All of the above. 28 Many protist species can switch from asexual to sexual reproduction when necessary. A. True B. False 29. Which of the following is NOT true of sexual reproduction in protists? A. Often linked to nutrient depletion B. May be triggered by environmental changes C. Often associated with cysts D. Cysts are resistant to temperature extremesarrow_forwardWhat do you call a finger-like projection that arises from epithelial layer in some organs that helps to increase surface area allowing for faster and more efficient adsorption? A. cillia B. flagella C. microvilli D. villi Cell modification is the change in the structure of cell to carry out specialized function. Which of the following words will BEST describe the cell modification? A. alteration B. differentiation C. evolution D. mutation You learned that cells are structurally modified so that they can perform their function efficiently and effectively. Which of the following structures have specialized functions due to cell modification? I. Guard cells II. Haemoglobin Trichomes Xylem vessels III. IV. A. 1, II and III B. I, II and Iv C. I, III, and IV D. I, II, III and IV Which of the following statements best illustrate the adaptation and function of nodified cell? A. The xylem in the leaf helps the leaf to be positioned horizontally towards the sun. B. The hair-like structure in…arrow_forward1. A series of complex proteinaceous strips that allow flexing movement of the Euglena.2. In the genus Trypanosoma it refers to single mitochondrion with large DNA associated with the basal body. 3.arrow_forward
- Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781305073951Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College