Which of the following is thought to be a necessary precursor for Eukaryotes to evolve? Organic matter for Eukaryotes to "eat" The atmosphere containing oxygen Endosymbiosis of aerobically respiring bacteria All of these are thought to be necessary
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Which of the following is thought to be a necessary precursor for Eukaryotes to evolve?
Organic matter for Eukaryotes to "eat" |
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The atmosphere containing oxygen |
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Endosymbiosis of aerobically respiring bacteria |
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All of these are thought to be necessary |
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- Which of the following is not true concerning the mitochondria and chloroplasts and is not evidence in support of the Endosymbiotic Theory? Both divide independently of the eukaryotic cell they are within Both contain their own DNA in a single, circular chromosome Both can survive independently when removed from a eukaryotic cell Both are about the same size as a bacteriaWhich of the following pieces of evidence could support the endosymbiotic theory if found to be true? Traces of peptidoglycan in the cytoplasm in eukaryotes Presence of rRNA in eukaryotes Presence of 80S ribosomes in eukaryotes The discovery of a unicellular eukaryoteAn endosymbiont is any organism that lives within the body or cells of another organism. Each would have performed mutually benefiting functions from their symbirie relationship. Why are the mitochondria considered an endosybiont in an eukaryotic cell ? They have two membranes have DNA sequences that indicate origin from the alpha- prroteobacteria has a means for using oxygen and create ATP can break down glucose for energy O They contain hydrolytic enzymes
- According to the endosymbiotic theory, which of the following is NOT true about the evolution of life on earth? Eukaryotes and prokaryotes appeared at about the same time and evolved independently from each other. O None of the other four answers (all are true statements) Eukaryotes evolved from symbiotic prokaryotes living inside other prokaryotes Mitochondria and chloroplasts are in some ways similar to prokaryotes The first life on earth was simple organisms, similar to today's prokaryotesAfter the glacial retreat at the end of the last ice age, some three-spine stickleback fish (Gasterosteus aculeatus) were isolated in small lakes. A mutation occurred in these fish that resulted in the loss of pelvic spines. Today, all freshwater sticklebacks lack pelvic spines, but are still classified as members of the same species as marine sticklebacks. Scientists collected sticklebacks from both marine and freshwater environments and placed them together in a controlled environment. Which of the following statements describes the effect of the mutation on their ability to interbreed? They should be able to interbreed and produce fertile offspring. They will not be able to interbreed and produce offspring because of hybrid breakdown. They will not be able to interbreed and produce offspring because of mechanical isolation. They should be able to interbreed and produce offspring, but the offspring may experience reduced hybrid fertility.Based on genes from mitochordrial DNA the most accepted tree of life includes three domains. Eukaryotes and archaea are most closely related to each other than either are to bacteria. MRNA rRNA TRNA 0000
- Which of the following statement is not a line of evidence supporting the endosymbiotic theory for the evolution of eukaryotes? Question 8 options: Mitochondria and plastids have their own circular DNA which is similar to bacterial DNA. Mitochondria and plastids can both live and reproduce outside of a cell. Mitochondria and plastids are separated from the rest of the cell by a membrane. Mitochondria and plastids reproduce independently of the rest of the cell.Which of the following correctly describes the theory of endosymbiosis. Question 9 options: Mitochondria evolved from a genetic mutation within an ancestral prokaryote. An ancestral prokaryote engulfed another prokaryote that eventually evolved into the organelles we recognize as mitochondria and chloroplasts. Some species of prokaryotes can pick up plasmids left behind by other prokaryotes.Which of the following are lines of evidence for endosymbiosis? Inner membranes are similar to plasma membranes of prokaryotes O DNA structure in chloroplasts and mitochondria are similar to that of prokaryotes Mitochondrial ribosomes are more similar to prokaryotic than eukaryotic ribosomes O The DNA found in the nucleus of a eukaryotic cell is very similar to that of prokaryotes.
- which of the following sentences are NOT correct about mitochondria: is found in all eukaryotic and prokaryotic cells is not found in some cells such as liver cells is generate most the cell's supply ATP O is a double membrane-bound organelle which of the following are NOT correct about prokaryotic organisms is reproduction by binary fission is have linear DNA is have flagella made of tubulin is have nuclear bodyAccording to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except: Endosymbiosis in a nutshell: 1. Start with two 2. One bacterium engulfs the other. 3. One bacterium now lives inside the other. independent bacteria. 4. Both bacteria benefit from the arrangement. 5. The internal bacteria are passed on from generation to generation. O a they each have a double membrane they have chromosomes similar in shape to their host they are the size of bacteria their DNA is different from its hostEvolutionary microbiologists developed a theory about a common ancestor for all eukaryotic cells. Below is a model of the theorized changes during the origin of eukaryotic cells. Prokaryotes are not capable of phagocytosis, or engulfing outside particles by creating a pocket in the cell membrane. Which of the following changes in early prokaryotes could be predicted to result in the emergence of eukaryotic organisms? A - the development of genetic transfer mechanisms in prokaryotes B - the evolution of predatory or parasitic relationships in prokaryotes C - the emergence of collections of cells functioning together in prokaryotes D = the expansion of internal structures to support larger individual cells in prokaryotes