CUSTOM BIOLOGY
19th Edition
ISBN: 9781323945490
Author: Urry
Publisher: Pearson Custom Publishing
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Chapter 28, Problem 2TYU
Biologists think that endosymbiosis gave rise to mitochondria before plastids partly because
(A) the products of photosynthesis could not be
(B) all eukaryotes have mitochondria (or their remnants), whereas many eukaryotes do not have plastids.
(C) mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA.
(D) without mitochondrial CO2 production, photosynthesis could not occur.
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Plastids that are surrounded by more than twomembranes are evidence of(A) evolution from mitochondria.(B) fusion of plastids.(C) origin of the plastids from archaea.(D) secondary endosymbiosis.
1. Why was the great oxygenation event important for mitochondrial development?
a) In your own words, define symbiotic.
2. Chloroplasts and mitochondria both contain a circular DNA chromosome, and ribosomes. Why does this evidence support the theory of endosymbiosis as the mechanism for the origin of eukaryotic cells?
a) Today, could mitochondria live independently of their eukaryotic cell host? Give two pieces of evidence to support your answer.
According to the endosymbiont theory:
a)
modern plant cells are able to carry out photosynthesis because their ancestors engulfed cyanobacteria.
b)
chloroplasts and mitochondria evolved from prokaryotic cells.
c)
ancestral eukaryotic cells acquired the ability to carry out aerobic respiration as a result of engulfing aerobic bacteria.
d)
a and c
e)
a, b and c
Chapter 28 Solutions
CUSTOM 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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- The origin of the photosynthetic eukaryote took place when a ______ was engulfed by a later eukaryote with mitochondria. Later eukaryote with mitochondria b) early eukaryote with chitin c) early prokaryote with ribosomes d) later prokaryote with chloroplastsarrow_forwardGive an example of a protist that is:(a) a parasite of humans(b) very large and photosynthetic(c) a unicellular species with two flagella and photosynthetic(d) covered in ciliaarrow_forwardA cell described as n + n is (a) monokaryotic (b) diploid (c) haploid (d)coenocytic (e) dikaryoticarrow_forward
- Which of these would be evidence against endosymbiosis? a) chloroplast have their own DNA O b) their structure resembles that of prokaryotes O c) the presence of one membrane O d) chloroplast resemble cyanobacteriaarrow_forwardThe concept of endosymbiosis as applied to chloroplast and mitochondria found in eukaryotes: a) is based on evidence that Chloroplasts and Mitochondria were originally prokaryotes, b) changes present day animals into plants, c) explains how chemical evolution caused the appearance of life, d) allowed chloroplasts to carry out aerobic metabolism, e) all are true.arrow_forwardListed are the following characteristics or functions exhibited by organisms. For each organism in the first column of the following table, check the columns that correspond to that organisms characteristics a.)Autotrophic b.)Performs photosynthesis c.)Usually motile d.)Cell division requiring cell plate formation e.)Shows alternation of generations f.)Performs cellular respiration g.)Has mitochondria h.)Reproduces sexually and asexually i.)Can adapt and acquire immunity to pathogens j.)Heterotrophic k.)Has a structure called a brain l.)Can perform mitosis m.)Eukaryotic n.)Prokaryotic o.)Has genetic materials or DNAarrow_forward
- Molecular evidence supports the view that all plastids evolved from an ancient (a) cyanobacterium (b) archaean (c) diplomonad (d) apicomplexan (e) unikontarrow_forwardIn lecture, we discussed the endosymbiont theory that describes the evolutionary origins of mitochondria and chloroplast. A few scientists think that peroxisomes also have an endosymbiotic evolutionary origin, although most scientists disagree with this hypothesis. Which of the following hypothetical discoveries would provide support for the hypothesis that peroxisomes evolved from bacteria? Discovering that eukaryotic cells cannot live without peroxisomes. All of these hypothetical discoveries would provide support for the hypothesis that peroxisomes have an endosymbiotic evolutionary origin. Identifying the presence of DNA within peroxisomes. Determining that the majority of proteins in peroxisomes have eukaryotic origin.arrow_forwardWhat evidence supports the hypothesis that mitochondria preceded plastids in the evolution of Eukaryotes cells?arrow_forward
- A scientist discovered a new group of unicellular organisms that lack mitochondria but possess an organelle related to the endoplasmic reticulum and is involved in energy production. The scientist hypothesizes that this organelle might be a missing link in the evolution of mitochondria. A) Do you agree with this hypothesis? Explain. B) Based on the available evidence, what is the most likely hypothesis for the origin of mitochondria? Provide four pieces of evidence to support this theory and justify why they are valid.arrow_forwardWhat evidence supports the hypothesis that mitochondriapreceded plastids in the evolution of eukaryotic cells?arrow_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_forward
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