Assignment 1
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What are the two kinds of cellular life forms on Earth?
Prokaryotes and eukaryotes
What organelles evolved from bacteria by endosymbiosis?
Mitochondria and plastids
What is the ancestral lineage of mitochondria according to evidence?
Alpha-proteobacterial ancestry
What significant role did DNA sequencing play in eukaryotic cell evolution?
Solved early problems and framed modern views on endosymbiotic theory
Who first introduced the terms ‘prokaryote’ and ‘eukaryote’?
Edouard Chatton
What concept did the Russian botanist Constantin Mereschkowsky contribute to?
Symbiogenesis
What does endosymbiosis refer to?
The bringing together of distinct cells, one inside the other
What is the ‘eocyte hypothesis’?
A revival suggesting eukaryotes emerged from within archaea
What did Lynn Margulis propose about the origin of eukaryotic cells?
Eukaryotic cells are the result of ancient symbioses
What is the Serial Endosymbiosis Theory?
A theory that describes the evolutionary process of eukaryotic cells through endosymbiosis
What were the two competing models for eukaryotic evolution framed by Max Taylor?
Autogenous and xenogenous models
What is the traditional view of the origin of eukaryotic cells?
Eukaryotic cellular complexity arose prior to endosymbiotic uptake
True or False: Mereschkowsky believed mitochondria evolved by endosymbiosis.
False
What was the significance of the work by Carl Woese in the 1970s?
Led to the discovery of archaea and provided early nucleic acid sequences for endosymbiont hypothesis
Fill in the blank: The first explicit case for an endosymbiotic origin for plastids was proposed by _______.
Constantin Mereschkowsky
What did the phylogenetic analyses suggest about the relationship between archaea and eukaryotes?
Archaea and eukaryotes share a more recent common ancestor than either does with bacteria
What is one of the main questions regarding how eukaryotes evolved?
How, how often, and why endosymbiosis occurred
What was a common belief among those who opposed endosymbiotic models for organelle evolution?
That eukaryotic cells evolved directly from advanced prokaryotic cells
What was the impact of the molecular biology revolution on endosymbiotic theory?
Provided tools to test and validate the theory
What is the endosymbiont hypothesis?
It posits that mitochondria and plastids originated from free-living prokaryotes that entered into a symbiotic relationship with ancestral eukaryotic cells.
Who developed the RNA cataloguing technique that contributed to the endosymbiont hypothesis?
Carl Woese
What did the early studies of rRNA sequences reveal about algal plastids and cyanobacteria?
They demonstrated a strong evolutionary link between them.
What significant discovery was made about mitochondrial rRNA fragments in the 1970s?
They were shown to be demonstrably prokaryotic.
What hypothesis did Margulis propose regarding eukaryotic flagella?
That they were of endosymbiotic origin.