Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 18, Problem 5MCQ
Why are DNA sequences useful in the classification of protists?
- a. Because only protists have DNA
- b. Because genetic sequences have confirmed the traditional categories of protists
- c. Because DNA reveals evolutionary relationships, even among organisms that look different
- d. All of the above are correct.
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Why is the classification of protists based on DNA sequences considered useful? a. Because only protists have DNA b. Because genetic sequences have confirmed the traditional categories of protists c. Because DNA reveals evolutionary relationships, even among organisms that look different d. All of the above are correct.
Which 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.
The endosymbiotic theory explains the:a. origin of the first prokaryotic cells.b. origins of mitochondria and chloroplasts in eukaryotes.c. evolutionary relationship between animals, plants, and fungi.d. method of reproduction in protists.
Chapter 18 Solutions
Biology: Concepts and Investigations
Ch. 18.1 - What features define the protists?Ch. 18.1 - Prob. 2MCCh. 18.1 - Why are evolutionary biologists interested in...Ch. 18.2 - Prob. 1MCCh. 18.2 - Prob. 2MCCh. 18.2 - List and describe the characteristics of the major...Ch. 18.3 - What mode of nutrition do the slime molds and...Ch. 18.3 - Prob. 2MCCh. 18.3 - Prob. 3MCCh. 18.4 - Prob. 1MC
Ch. 18.4 - Prob. 2MCCh. 18.4 - List three diseases caused by flagellated...Ch. 18.4 - Compare and contrast amoebae, foraminiferans, and...Ch. 18.4 - How do ciliates move and eat?Ch. 18.4 - Prob. 6MCCh. 18.5 - Prob. 1MCCh. 18.5 - Prob. 2MCCh. 18.6 - Use the food chain in figure 18.21a to explain why...Ch. 18.6 - Prob. 2MCCh. 18 - Which of the following is NOT a characteristic of...Ch. 18 - Suppose you are studying a protist under a...Ch. 18 - Some protist lineages arose from secondary...Ch. 18 - Prob. 4MCQCh. 18 - Why are DNA sequences useful in the classification...Ch. 18 - Explain why evolutionary biologists are interested...Ch. 18 - The amoeba Pelomyxa palustris is a single-celled...Ch. 18 - How is it adaptive for a red alga to have pigments...Ch. 18 - How are kelp similar to trees? How are they...Ch. 18 - Prob. 5WIOCh. 18 - Prob. 6WIOCh. 18 - Prob. 7WIOCh. 18 - Suppose someone hands you a microscope and a...Ch. 18 - Review the Survey the Landscape figure in the...Ch. 18 - Prob. 2PITCh. 18 - Molecular data have changed protist...
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- You have discovered a photosynthetic protist that lives in fairly deep water (for example, 250 m deep). To which of the following groups should this organism be classified? A. diatoms B. green algae C. red algae D. cercozoanarrow_forwardWhich of the following statements is the MOST compelling argument that fungi are more closely related to animals than plants? A. Plants have chloroplasts whereas fungi and animals cells do not. B. Plants fix carbon dioxide from the air; fungi and animals use pre-existing organic molecules. C. The DNA sequences of ribosomal RNA of fungi share more homology with ribosomal RNA from animals than plants. D. Both animal and fungal cells are eukaryotic.arrow_forwardWhich of these protists is hypothesized to be ancestral to animals? a. a green algal protist b. a choanoflagellate c. an amoeboid protistd. a slime moldarrow_forward
- In the tree of life, which taxon does not belong to the Archaeplastida? A. green algae B. Charophyta C. flowering plants D. diatoms E. Red algaearrow_forwardWhich of the following taxon contains the other? a. Species b. Class c. Order d. Genusarrow_forwardA group of students observe a sample of water under a microscope. The students see a single celled organism digesting another cell. The single celled organism contains a nucleus in other organelles. In which kingdom would this organism most likely be classified? A. Animalia B. Fungi C. Plantae D. Protistaarrow_forward
- A group of environmentalists is studying the effects of recent commercial zoning to wildlife acreage on the biodiversity of a rural county. The group noted a steady decline in the population of animals, while bacteria and other protists remained constant. Which statement best discusses the reasons for the steady decline of animals as opposed to the protists? A. Bacterial growth is usually not affected by environmental changes because of asexual reproduction. B. The animals could not adapt to the new environment. C. Bacteria lived in areas that were not affected by the zoning D. The animals became susceptible to human and environmental harm.arrow_forwardWhich pair of species would be the most similar? a. Both are in the same kingdom but different phyla b. Both are in the same phylum but different classes O c. Both are in the same class but different orders d. Both are in the same order but in different genus O e. Both are in the same Domain but different Kingdomarrow_forwardWhich group is correctly paired with its description? A. diatoms-important consumers in aquatic communities B. diplomonads-protists with modified mitochondria C. apicomplexans -producers with intricate life cycles D. red algae-acquired plastids by secondary endosymbiosisarrow_forward
- In this data table comparing DNA sequences among various protists, why do some cells have a dash rather than a value? A. Those cells would compare one species to itself. B. Those cells would duplicate comparisons shown elsewhere in the matrix. C. Those comparisons were not made by the researchers.arrow_forwardGive three examples of protists for which the classifications haverecently changed. In each case, what was the justification for the oldcategory, and what is the justification for the change?arrow_forwardIf you were studying the evolution of animal-specific cell-to-cellsignaling systems, from which of the following would you chooserepresentative species to observe?a. Rhodophyta b. Discoba c. Choanomonada d. Radiolaria e. Chlorophytaarrow_forward
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