题目
题目

BIOL 312 BIOL 312 - Exam 3

单项选择题

Ancestors of which type of bacteria likely gave rise to chloroplasts?

选项
A.proteobacteria
B.E. coli
C.streptococcus
D.cyanobacteria
E.pseudomonas
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标准答案
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思路分析
The question asks about the ancestral source of chloroplasts in plants and algae. Option 1: proteobacteria. While proteobacteria are the proposed ancestors of mitochondria in eukaryotes, they are not linked to chloroplast origin. Therefore this choice misattributes ch......Login to view full explanation

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Question at position 8 The endosymbiotic theory for the origin of mitochondria and chloroplasts suggests that these organelles arose from prokaryotic organisms that took up residence within an ancestral pre-eukaryotic cell. Which of the following statements offered in support of this theory is FALSE?Mitochondria and chloroplasts have circular chromosomes.Mitochondria, chloroplasts, and prokaryotes are similar in size.Mitochondria and chloroplasts have nuclei like other prokaryotes.Mitochondria and chloroplasts multiple by binary fission, like other prokaryotes.Clear my selection

Question at position 15 The endosymbiotic theory for the origin of mitochondria and chloroplasts suggests that these organelles arose from prokaryotic organisms that took up residence within an ancestral pre-eukaryotic cell. Which of the following statements offered in support of this theory is FALSE?Mitochondria and chloroplasts have circular chromosomes.Mitochondria and chloroplasts multiple by binary fission, like other prokaryotes.Mitochondria and chloroplasts have nuclei like other prokaryotes.Mitochondria, chloroplasts, and prokaryotes are similar in size.Clear my selection

Question at position 29 What evidence indicates mitochondria evolved before chloroplasts in eukaryotic cells?Chloroplasts can reproduce independently, while mitochondria cannot.Mitochondria are larger and more complex than chloroplasts.All eukaryotes have mitochondria, but only some groups have chloroplasts.Mitochondria contain linear chromosomes, whereas chloroplasts have circular chromosomes.Clear my selection

Endosymbiotic theory explains...

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