Concept explainers
The internal structure of many protists is much more complex than that or cells of multicellular organisms. Does this mean that the protist is engaged in more complex activities than the multicellular organism is? If not, why ire protistan cells more complicated?
To explain:
If or if not the protist organizations are involved in more complex activities than the multicellular organisms and are they more complicated than the other multi-cellular organizations.
Introduction:
Protists are small unicellular eukaryotic organisms, which have organelles like chloroplasts and mitochondria present inside the cells. The other organisms include prokaryotes, which do not have a nucleus and the chromosome is present in the cytoplasm.
Explanation of Solution
Protists have evolved over the other prokaryotic organizations due to differences in modes of nutrition, reproduction, and locomotion. The protists group includes Stramenopiles, Euglenozoans, Apicomplexans, and Amoebas.
Stramenopiles include diatoms, which are heterotrophic organisms with photosynthetic pigments for the preparation of food and metabolites inside the cell.
Euglenozoans are photosynthetic organisms, which prepare their food by trapping the energy from sunlight.
Apicomplexans are heterotrophic parasitic organisms in the human body. Amoebas have pseudopodia for locomotion and absorb food through the process of phagocytosis.
Protists have both the modes of asexual and sexual reproduction, which give them an added advantage over the other multi-cellular organisms.
Yes, these features of differences in nutrition, reproduction and locomotion confirm the evolution of the protists with development of complex activities over the other prokaryotic organisms and multicellular organisms.
The protists have complex features for preparing food due to the presence of chlorophyll. Flagella and pseudopodia for locomotion and presence of organelles like mitochondria, nucleus, and chloroplasts make them more complex than the multicellular organisms.
Want to see more full solutions like this?
Chapter 21 Solutions
Mastering Biology with Pearson eText -- Standalone Access Card -- for Biology: Life on Earth with Physiology (11th Edition)
- Which parasitic protist evades the host immune system by altering its surface proteins with each generation? a. Paramecium caudatum b. Trypanosoma brucci c. Plasmodium falciparum d. Phytophthora infrstansarrow_forwardA protist that contains contractile vacuoles most likely lives ______. in ice in a marine environment in fresh water within the cells of another organismarrow_forwardWhich statement about protists is true? a. Protists have many different metabolic lifestyles. b. Almost all protists are parasitic. c. All protists use pseudopods or cilia to locomote. d. All marine protists rid themselves of excess water by means of contractile vacuoles. e. Protists are found only in aquatic habitats.arrow_forward
- Which of the following is NOT a characteristic of all protists?a. Unicellularb. Cells containing membrane-bounded organellesc. Cells containing a nucleusd. Eukaryoticarrow_forwardWhat feature do all ‘protists’ have in common that differentiates them from fungi, plants and animals?arrow_forwardif global warming trends continue, many species, including protists and fungi, may become extinct due to habitat loss. Name two ecological roles of protists and two ecological roles of fungiarrow_forward
- What genus of protists appears to contradict the statement that unicellularity restricts cell size? a. Dictyostelium b. Ulva c. Plasmodium d. Caulerpaarrow_forwardWhich of the following is NOT true of protists? Select one: a. Some are unicellular. b. They may be photosynthetic. c. They are usually aerobic, though some are not. d. They may have cell walls. e. They may be prokaryotic.arrow_forwardAmoeba, Paramecuim, and Spirogyra are diverse. Why, then, are they all classified as protists?arrow_forward
- which of the statements is not true regarding protist? a. they may have cell walls b. They may be photosynthetic c. they may be prokaryotic d. they are usually aerobic though some are not e. some are unicellulararrow_forwardA principle of biology is that biology affects our society. Whyare the cysts of protists important to epidemiologists, thebiologists who study the spread of disease?arrow_forwardMatch each protist with its most suitable description. ____ diplomonad a. whirling cell ____ water mold b. silica-shelled producer ____ dinoflagellate c. grows as filaments ____ diatom d. anaerobic parasite ____ amoeba e. closest relative of plants ____ red alga f. closest relative of animals ____ choanoflagellate g. contains phycobilins ____ charophyte alga h. feeds using pseudopodsarrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College