Brock Biology of Microorganisms, MasteringMicrobiology with eText and Access Card (14th Edition)
14th Edition
ISBN: 9780133857276
Author: Michael Madigan
Publisher: PEARSON
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Chapter 17, Problem 14RQ
Summary Introduction
Yeast is unicellular eukaryotic fungi which can exhibit spherical, oval or cylindrical form. Yeast can reproduce by the means of vegetative and sexual methods. There are two different forms of mating types present in yeast. These mating types are haploid cells and can be designated as “α (alpha) and a”.
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. A geneticist working on a haploid fungus makes a cross between two slow-growing mutants called mossy and spider (referring to the abnormal appearance of the colonies). Tetrads from the cross are of three types (A, B, C), but two of them contain spores that do not germinate.Devise a model to explain these genetic results, and propose a molecular basis for your model.
1. Why does the endosymbiotic hypothesis need to maintain that chloroplasts may have had at least three different origins? It is because
a. the phyla of algal protists can be divided into three groups based on photosynthetic pigments and chloroplast structure
b. molecular systematics link the red line, green line, and brown line to three different eubacteria
c. the pigment compositions and thylakoid arrangement of cyanobacteria occur in three different arrangements
d. the chloroplasts of green plants show three distinct morphologies
2. What do the banded formations in marine sediments indicate?
a. Early cyanobacteria probably were producing oxygen when the sediment was deposited.
b. The pH value of the early seas was quite low due to the excretion of organic acids from the fermentation by prokaryotes.
c. Purple sulfur bacteria were the dominant life form in the seas during that time.
d. The early atmosphere was very reducing.
3. How did the first gene develop?…
Organelle heredity can be attributed to:
a. mitochondria and chloroplasts have DNA that is subject to mutation
b. mitochondria and chloroplasts lack DNA and are therefore dependent on the maternal cytoplasmic contributions
c. organelles such as mitochondria are always dominant
d. chloroplasts, for example, are completely dependent on the nuclear genome for components
Chapter 17 Solutions
Brock Biology of Microorganisms, MasteringMicrobiology with eText and Access Card (14th Edition)
Ch. 17.1 - Prob. 1MQCh. 17.1 - Prob. 2MQCh. 17.1 - Prob. 3MQCh. 17.2 - Prob. 1MQCh. 17.2 - Prob. 2MQCh. 17.2 - Prob. 3MQCh. 17.3 - Prob. 1MQCh. 17.3 - Prob. 2MQCh. 17.4 - Contrast the two nutritional options for Euglena.Ch. 17.4 - Prob. 2MQ
Ch. 17.4 - Prob. 3MQCh. 17.5 - Prob. 1MQCh. 17.5 - Prob. 2MQCh. 17.5 - What are apicoplasts, which organisms have them,...Ch. 17.6 - Prob. 1MQCh. 17.6 - Prob. 2MQCh. 17.6 - Prob. 3MQCh. 17.7 - Prob. 1MQCh. 17.7 - How are chlorarachniophytes thought to have...Ch. 17.8 - Prob. 1MQCh. 17.8 - Compare and contrast the lifestyles of gymnamoebas...Ch. 17.8 - Prob. 3MQCh. 17.9 - What are conidia? How does a conidium differ from...Ch. 17.9 - Prob. 2MQCh. 17.9 - Prob. 3MQCh. 17.10 - Why is the mold Penicillium economically...Ch. 17.10 - Prob. 2MQCh. 17.10 - Prob. 3MQCh. 17.11 - Prob. 1MQCh. 17.11 - Prob. 2MQCh. 17.11 - Prob. 3MQCh. 17.12 - Prob. 1MQCh. 17.12 - Prob. 2MQCh. 17.12 - Prob. 3MQCh. 17.13 - Prob. 1MQCh. 17.13 - Prob. 2MQCh. 17.14 - Prob. 1MQCh. 17.14 - Prob. 2MQCh. 17.15 - What traits link cyanobacteria and red algae?Ch. 17.15 - Prob. 2MQCh. 17.16 - What phototrophic properties link green algae and...Ch. 17.16 - What is unusual about the green algae...Ch. 17.16 - Prob. 3MQCh. 17 - Prob. 1RQCh. 17 - Prob. 2RQCh. 17 - Prob. 3RQCh. 17 - Prob. 4RQCh. 17 - Prob. 5RQCh. 17 - Three groups make up the alveolates: ciliates,...Ch. 17 - Prob. 7RQCh. 17 - REVIEW QUESTIONS
8. What morphological trait...Ch. 17 - Prob. 9RQCh. 17 - Prob. 10RQCh. 17 - Prob. 11RQCh. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - Prob. 14RQCh. 17 - Prob. 15RQCh. 17 - Prob. 16RQCh. 17 - Green algae are common in aquatic environments and...Ch. 17 - Explain why the process of endosymbiosis can be...Ch. 17 - Summarize the evidence for endosymbiosis. How...
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