In addition to
the lack of histones, mitochondria and chloroplasts have circular, single stranded DNA
. Single stranded, circular DNA is found exclusively in prokaryotes. This evidence supports the endosymbiosis theory because these characteristics would allow the mitochondria and chloroplasts to survive on their own.
Which of the following is evidence in support of the endosymbiotic theory?
Which of the following is evidence to support the endosymbiotic theory?
Prokaryotes have the same number and types of enzymes as eukaryotes
. Mitochondria and chloroplasts have their own DNA, which is similar to prokaryotic DNA. … Fossil evidence shows that the first forms of life were prokaryotic cells.
What scientific evidence supports endosymbiosis?
The first piece of evidence that needed to be found to support the endosymbiotic hypothesis was
whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA
. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.
What evidence supports the theory of endosymbiosis quizlet?
What evidence exists to support the endosymbiotic origins of eukaryotic cells? The endosymbiotic theory is
based on mitochondria and chloroplasts of eukaryotes
. Both structures have characteristics (such as their own DNA and the ability to self-replicate) of independent prokaryotes.
What is the best evidence for the serial endosymbiotic theory?
Evidence. Much of the evidence for the endosymbiotic theory comes from the
structure and handling of these organelles' genetic codes
. Both mitochondria and plastids have DNA sequences in circles as that of bacteria.
What are 4 pieces of evidence that support the endosymbiotic theory?
Numerous lines of evidence exist, including that
mitochondria and chloroplasts have their own circular DNA (prokaryotes also have circular DNA)
, mitochondria and chloroplasts have a double membrane (the inner membrane would have initially been the ingested prokaryote's single membrane, and the outer membrane initially …
Which of the following is not evidence to support the endosymbiotic theory?
“
The exterior structure similar to bacterial cell walls
” IS NOT an evidence in favour of the endosymbiotic theory. Both mitochondria and chloroplasts are double membrane bound.
What are three main sources of evidence for endosymbiosis?
What are three main sources of evidence for endosymbiosis?
DNA, RNA, Ribosomes and Protein Synthesis
This provided the first substantial evidence for the endosymbiotic hypothesis. It was also determined that mitochondria and chloroplasts divide independently of the cell they live in.
Which type of cell has no nucleus?
Prokaryotes
are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.
What are the 3 functions of the cytoskeleton?
The cytoskeleton is responsible for
contraction, cell motility, movement of organelles and vesicles through the cytoplasm, cytokinesis, establishment of the intracellular organization of the cytoplasm, establishment of cell polarity
, and many other functions that are essential for cellular homeostasis and survival.
Which of the following is not evidence of the endosymbiotic theory quizlet?
Which of the following is NOT evidence for the endosymbiosis theory? NOT EVIDENCE:
Mitochondria and chloroplasts have DNA that is similar to that found in the nucleus
.
Why is endosymbiosis only a theory?
It is thought that life arose on earth around four billion years ago. The endosymbiotic theory states that
some of the organelles in today's eukaryotic cells were once prokaryotic microbes
. … They eventually lost their cell wall and much of their DNA because they were not of benefit within the host cell.
What are two major differences between prokaryotic bacterial and eukaryotic protist cells?
Comparing prokaryotes and eukaryotes
The primary distinction between these two types of organisms is that
eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not
. The nucleus is where eukaryotes store their genetic information.
What evidence did Lynn Margulis provide to support the endosymbiotic theory?
In the now generally accepted endosymbiotic theory, Margulis demonstrated that
current plant cells resulted from the merging of separate ancestors, the chloroplast evolving from endosymbiotic cyanobacteria
(autotrophic prokaryotes).
Is endosymbiotic theory true?
These theories were initially dismissed on the assumption that they did not contain DNA. This was proven false in the 1960s, leading Hans Ris to resurrect the idea. Endosymbiosis is
a debate that has been widely accepted in the molecular biology world
.
What is an Endosymbiotic event?
The original endosymbiotic event that ultimately lead to (almost) all of the organelles we call plastids occurred after the
time
of LECA, and clearly involved a fully developed eukaryotic cell as the host, and a cyanobacterium capable of oxygenic photosynthesis as the symbiont.
