choose the correct answer 1) What do the banded formations in marine sediments indicate? A. Early cyanobacteria probably were producing oxygen when the sediment was deposited. B. Purple sulfur bacteria were the dominant life form in the seas during that time. D. The pH value of the early seas was quite low due to the excretion of organic acids from the fermentation by prokaryotes. C. The early atmosphere was very reducing. 2) Which of the following is not evidence that chloroplasts and mitochondria originated as prokaryotic endosymbionts of larger cells? A. They contain circular DNA molecules not associated with proteins. B. Their membranes have enzymes and transport systems that resemble those found on the plasma membranes of prokaryotes. D. Their ribosomal RNA is more similar to that of eubacteria than to the RNA of ribosomes in the eukaryotic cytoplasm. C. They contain their own genome and produce all their own protein 3) Why does the endosymbiotic hypothesis need to maintain that chloroplasts may have had at least three different origins? It is because A. molecular systematics link the red line, green line, and brown line to three different eubacteria. B. the chloroplasts of green plants show three distinct morphologies. C. the phyla of algal protists can be divided into three groups based on photosynthetic pigments and chloroplast structure.

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter13: Diversity Of Microbes, Fungi, And Protists

Section: Chapter Questions

Problem 3RQ: The first organisms that oxygenated the atmosphere were ______. a. cyanobacteria b. phootrophic...

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choose the correct answer

1) What do the banded formations in marine sediments indicate?

A. Early cyanobacteria probably were producing oxygen when the sediment was deposited.

B. Purple sulfur bacteria were the dominant life form in the seas during that time.

D. The pH value of the early seas was quite low due to the excretion of organic acids from the fermentation by prokaryotes.

C. The early atmosphere was very reducing.

2) Which of the following is not evidence that chloroplasts and mitochondria originated as prokaryotic endosymbionts of larger cells?

A. They contain circular DNA molecules not associated with proteins.

B. Their membranes have enzymes and transport systems that resemble those found on the plasma membranes of prokaryotes.

D. Their ribosomal RNA is more similar to that of eubacteria than to the RNA of ribosomes in the eukaryotic cytoplasm.

C. They contain their own genome and produce all their own protein

3) Why does the endosymbiotic hypothesis need to maintain that chloroplasts may have had at least three different origins? It is because

A. molecular systematics link the red line, green line, and brown line to three different eubacteria.

B. the chloroplasts of green plants show three distinct morphologies.

C. the phyla of algal protists can be divided into three groups based on photosynthetic pigments and chloroplast structure.

D. the pigment compositions and thylakoid arrangement of cyanobacteria occur in three different arrangements.

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