Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 21, Problem 3FIB
Protist chloroplasts surrounded by four-layer membranes arose evolutionarily through __________, in which an ancestral nonphtotosynthetic protist engulfed but did not digest a(n) __________.
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Plastids of Glaucophytes are called ________________. It is derived from the ______________ endosymbiosis of an ancestral cyanobiont with a glaucophyte eukaryotic ancestor.
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Prokaryotes reproduce by___________ and maysometimes exchange genetic material through the processof____________ .
Chapter 21 Solutions
Biology
Ch. 21.1 - What do biologists mean when they say that sex and...Ch. 21.1 - define protist and describe the various ways in...Ch. 21.1 - describe a scenario for the evolutionary origin of...Ch. 21.1 - describe the major effects of protists on people...Ch. 21.2 - Prob. 1TCCh. 21.2 - Just as the invasive Cauterpa seaweed often...Ch. 21.2 - If you like sushi, youve probably eaten a sushi...Ch. 21.2 - list the major protist taxonomic groups and the...Ch. 21.2 - describe some examples of how members of each...Ch. 21.2 - Is it important to stop the spread of Caulerpa?...
Ch. 21 - Which of the following statements about protists...Ch. 21 - The harmful protist blooms known as red tides are...Ch. 21 - The organism that causes malaria belongs to which...Ch. 21 - The finger-like extensions of the cell membrane...Ch. 21 - Prob. 5MCCh. 21 - Prob. 1FIBCh. 21 - Prob. 2FIBCh. 21 - Protist chloroplasts surrounded by four-layer...Ch. 21 - Prob. 4FIBCh. 21 - Prob. 5FIBCh. 21 - Prob. 6FIBCh. 21 - List the major differences between prokaryotes and...Ch. 21 - What is secondary endosymbiosis?Ch. 21 - what is the importance of dinoflagellates in...Ch. 21 - What is the major ecological role played by...Ch. 21 - Which protist group consists entirely of parasitic...Ch. 21 - Which protist groups include seaweeds?Ch. 21 - Which protist groups include species that use...Ch. 21 - The internal structure of many protists is much...Ch. 21 - What are some important benefits and services...
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- In secondary endosymbiosis, the plastid organelle is derived from engulfing Prokaryotic algal cell. an True Falsearrow_forwardEndosymbiosis greatly altered eukaryotes as they acquired organelles. In the red algae shown below, the mitochondria is on left (solid lines), the chloroplast is in the middle (dotted lines), and the nucleus is on the right (dashed lines).arrow_forwardCarbon-containing mechanism of plant-like protists occurs in _________NucleusGulletPyrenoidContractile vacuoleUndulating membranearrow_forward
- The prtists that causes malaria evolved from a photosynthetic ancestor and has the remnant of a chloroplast. The organelle no longer functions in photosynthesis, but it remains essential to the protist. Why might targeting this organelle yield an antimalarial drug that produces minimal side effects in humans?arrow_forwardSlime 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_forwardYou are given five test tubes, each containing an unknown protist, and your task is to read the description below and match these five protists that you know to the correct test tube. -Paramecium -Pfiesteria (dinoflagellate) -Navicula (diatom) -Plasmodium -Amoeba In test tube 1, you sketch the organism and come up with a picture that looks like the one below. You note the organism appears to be “eating” the smaller microorganism. Chemical analysis of test tube 2 indicates the presence of a chemical that is toxic to fish and humans. In test tube 3, you detect the presence of substantial amounts of silica. Microscopic analysis of organisms in tube 4 reveals the presence of an apicoplast in the organism Microscopic analysis of the contents in tube 5 reveals the presence of one large macronucleus and several small micronuclei in each organism Match the description with the correct protistarrow_forward
- In the pictures below, identify the arrowed reproductive structures of microscopic cyanobacteria based on the following descriptions: Akinetes are dormant structures larger than the vegetative cells, are rich in food reserves, and have thick walls. Most filamentous cyanobacteria develop akinetes in adverse conditions (e.g., winter, dry periods). When favorable conditions return, they germinate and produce new filaments. Hormogonia are short pieces of filaments consisting of 5–15 trichomes that fragment and develop into new filaments. Heterocytes (or heterocysts) are multicellular structures that have a thick and massive sheath, formed by members of the Nostocales. It is the location of the enzyme nitrogenase for nitrogen fixation, the conversion of nitrogen gas into ammonium and then amino acids. They may be intercalary or terminal in position and may germinate from either end or both the ends to give rise to new filaments. Non-filamentous cyanobacteria generally produce spores…arrow_forwardStrepto-and Staphylo- are prefixes that describe: Ocell arrangement virulence spore location morphologyarrow_forwardSome non-plant organisms like the protist that spreads malaria contain a non-photosynthetic chloroplast called an apicoplast. Crazy! What best explains how protists have evolved apicoplasts?arrow_forward
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