Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305544703
Author: STARR
Publisher: Cengage
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Chapter 21, Problem 11SQ
Summary Introduction
Concept introduction: Protists include protozoa, unicellular algae, and slime molds. Contractile vacuoles are present in protists. It removes the excess water from the protist cell. It regulates the quantity of the water inside the cell. It was earlier known as pulsatile or the pulsating vacuole.
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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 unicellular
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.
Why don't we consider protists to all be in 1 kingdom together anymore?
Group of answer choices
A. because some of them are prokaryotic
B. because they are not all closely related
C. because they are all prokaryotic
D. because some of them are multicellular
Chapter 21 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 21 - Multicelled haploid and diploid bodies form in...Ch. 21 - The __________ of diplomonads and parabasalids...Ch. 21 - Radiolaria and diatoms have a shell of _______. a....Ch. 21 - Prob. 4SQCh. 21 - Prob. 1DAACh. 21 - Prob. 2DAACh. 21 - Prob. 3DAACh. 21 - Prob. 4DAACh. 21 - Diatoms produce _______ that help(s) them float....Ch. 21 - Prob. 6SQ
Ch. 21 - Green algae are most closely related to _____. a....Ch. 21 - Prob. 8SQCh. 21 - Which species does not cause human disease? a....Ch. 21 - _____ is produced from red algae. a. Diatomaceous...Ch. 21 - Prob. 11SQCh. 21 - Prob. 12SQCh. 21 - Prob. 13SQCh. 21 - Prob. 14SQCh. 21 - Match each term with its most suitable...Ch. 21 - Which groups or protists would you be most likely...Ch. 21 - Prob. 2CTCh. 21 - Prob. 3CT
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- The presence of a contractile vacuole indicates that a single-celled protist _______. a. is marine c. is photosynthetic b. lives in fresh water d. secretes a toxinarrow_forwardMitochondria in protists originated froma. cyanobacteria.b. chloroplasts.c. anaerobic bacteria.d. aerobic bacteria.e. eukaryotic cells.arrow_forwardSome protist lineages arose from secondary endosymbiosis. Howmany membranes would surround the chloroplasts of theseorganisms?a. 0 c. 2b. 1 d. 3 or morearrow_forward
- a salt water protist is placed in fresh water. Which of the following events would most likely occur? a.) the cell would shrink b.) the cell would remain the same (no change in shape) c.) the cell would start to cry d.) the cell would swell e.) an increase in the action of its ciliaarrow_forwardFungi Imperfecti or Deuteromycota:(a) Do not have complete hyphae(b) Do not form hyphae(c) Have no observed sexual stage(d) Cannot form conidia(e) Only form antheridiaarrow_forwardProtists with the capabilities to absorb nutrients from dead organisms are called ______. a. photoautotrophs b. autotrophs c. saprobes d. heterotrophsarrow_forward
- 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 generationsarrow_forwardWhich of the following is a characteristic of protists that is also found in at least one other group? a. division by binary fission b. multicellular structures c. complex developmental stages d. peptidoglycan cell walls e. organelles and reproduction by meiosis/mitosisarrow_forwardWhich 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_forward
- Spores released from a mushrooms gills are _______. a. dikaryotic c. flagellated b. diploid d. produced by meiosisarrow_forwardPhotosynthetic protists with shells composed of two halves that fit together like a petri dish are (a) golden algae (b) diatoms (c) euglenoids (d) brown algae (e) foramsarrow_forwardA meristematic cells a. Are dead b. Have a high cytosol/nucleus ration c. Have a few proplastids d. Have lignified cell wallsarrow_forward
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