EBK CAMPBELL BIOLOGY
10th Edition
ISBN: 9780136539414
Author: Reece
Publisher: VST
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Chapter 28.6, Problem 4CC
MAKE CONNECTIONS Ø The bacterium Wolbachia is a symbiont that lives in mosquito cells and spreads rapidly through mosquito populations. Wolbachia can make mosquitoes resistant to infection by Plasmodium; researchers are seeking a strain that confers resistance and does not harm mosquitoes. Compare evolutionary changes that could occur if malaria control is attempted using such a Wolbachia strain versus using insecticides to kill mosquitoes. (Review Figure 28.16 and Concept 23.4.)
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1. Identify the biological process by which the malaria carrying mosquitoes (Anopheles coluzzi or Anopheles Gambian) developed insecticide resistance.
USE THIS SENTENCE STARTER: The mosquitoes developed insecticide resistance by..
Wolbachia is a genus of bacteria that infect cells of invertebrates. Surveys have found that up to a
fifth of insect species have at least some individuals infected with Wolbachia. Pathogen or
parasite? This endosymbiont (a symbiont that lives inside its host) bacteria can have many effects
on its host, including killing offspring and changing the sex of offspring.
Ary Hoffmann from the University of Melbourne in Australia, Michael Turelli from the University of
California at Davis, and their associates have been studying Wolbachia infections in populations of
Drosophila simulans from California. From the initial infection around 1980, Wolbachia infection
spread northward across the state during the 1980s and 1990s. The most striking manifestation of
infection in this fly species is cytoplasmic incompatibility: offspring produced in crosses where
males are infected and the females are uninfected tend to die early in development. In crosses
between infected males and infected females,…
According to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as
illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except:
Endosymbiosis in a nutshell:
1. Start with two
2. One bacterium
engulfs the other.
3. One bacterium now
lives inside the other.
independent bacteria.
4. Both bacteria benefit
from the arrangement.
5. The internal bacteria are passed
on from generation to generation.
O a
they each have a double membrane
they have chromosomes similar in shape to their host
they are the size of bacteria
their DNA is different from its host
Chapter 28 Solutions
EBK CAMPBELL BIOLOGY
Ch. 28.1 - Cite at least four examples of structural and...Ch. 28.1 - Summarize the role of endosymbiosis in eukaryotic...Ch. 28.1 - Prob. 3CCCh. 28.2 - Why do some biologists describe the mitochondria...Ch. 28.2 - WHAT IF? DNA sequence data for a diplomonad, a...Ch. 28.3 - Explain why forams have such a well-preserved...Ch. 28.3 - WHAT IF? Would you expect the plastid DNA of...Ch. 28.3 - Prob. 3CCCh. 28.3 - Prob. 4CCCh. 28.4 - Contrast red algae and brown algae.
Ch. 28.4 - Why is it accurate to say that Ulva is truly...Ch. 28.4 - Prob. 3CCCh. 28.5 - Contrast the pseudopodia of amoebozoans and...Ch. 28.5 - Prob. 2CCCh. 28.5 - Prob. 3CCCh. 28.6 - Justify the claim that photosynthetic protists are...Ch. 28.6 - Prob. 2CCCh. 28.6 - WHAT IF? High water temperatures and pollution...Ch. 28.6 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 28 - Describe similarities and differences between...Ch. 28 - What evidence indicates that the excavates form a...Ch. 28 - Prob. 28.3CRCh. 28 - On what basis do systematists place plants in the...Ch. 28 - Describe a key feature for each of the main...Ch. 28 - Prob. 28.6CRCh. 28 - Plastids that are Surrounded by more than two...Ch. 28 - Biologists think that endosymbiosis gave rise to...Ch. 28 - Prob. 3TYUCh. 28 - According to the phylogeny presented in this...Ch. 28 - In a life cycle with alternation of generations,...Ch. 28 - Based on the phylogenetic tree in Figure 28.2,...Ch. 28 - Prob. 7TYUCh. 28 - SCIENTIFIC INQUIRY Applying the If then logic of...Ch. 28 - WRITE ABOUT A THEME: INTERACTIONS Organisms...Ch. 28 - SYNTHESIZE YOUR KNOWLEDGE This micrograph show's a...
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