the choice that best completes the statement or answers the question. Mentiple Choice 1. The endosymbiotic theory guifing s that eukaryotic cells.arose from a. one prokaryotic engulfing another prokaryotic cold b. multicellular prokaryotes. C. lightning d. one eukaryotic cell engulfing another eukaryotic cell occurreal evolution. According to this theory, which of the following events would need to the cries describing the origin of life on Earth is known as occur first for life to accordi b. onset of photosynthesis b. origin of genetic material C. synthesis of organic molecules d. formation of the plasma membrane 3. According to the endosymbiotic theory, which of the following explains why cells that mitochondria like organelles had an evolutionary advantage? a. They were able to photosynthesize C. They were immune to bacterial b. They had more DNA invasion d. They were able to make more use of available energy 4. Experiments conducted by Mille and Urey, and by others after them, have demonstrated that molecules for life could have been produced in Earth 's early atmosphere. These molecules include amino acids, carbohydrates, lipids, ATP and nucleotides of DNA and RNA. Which of the following suggests how the genetic material of cells may have evolved to give instructions for the functioning and replication of cells? a. A spark of electricity can catalyze chemical reactions that produce proteins from DNA. C. Cells link amino acids together into proteins, using instructions carried in the DNA and enzymes to catalyze the reactions. b. RNA, like enzymes, can catalyze chemical d. reactions, and some RNA molecules could be self-replicating. Chains of nucleotides form when water evaporates from a solution of nucleotides. 5. Mitochondria provide evidence that eukaryotic cells evolved through endosymbiosis. What features of mitochondria support this theory? are similar in size to bacteria a. Mitochondria contain their own DNA and C.Mitochondria have been found throughout the fossil record. b. Cells that contain mitochondria also contain chloroplasts and chloroplast membranes are similar to bacterial membranes. d. Mitochondria can be produced when sparks of electricity are passed through an environment of gases similar to the conditions of carly Earth

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the choice that best completes the statement or answers the question. Mentiple Choice 1. The endosymbiotic theory guifing s that eukaryotic cells.arose from a. one prokaryotic engulfing another prokaryotic cold b. multicellular prokaryotes. C. lightning d. one eukaryotic cell engulfing another eukaryotic cell occurreal evolution. According to this theory, which of the following events would need to the cries describing the origin of life on Earth is known as occur first for life to accordi b. onset of photosynthesis b. origin of genetic material C. synthesis of organic molecules d. formation of the plasma membrane 3. According to the endosymbiotic theory, which of the following explains why cells that mitochondria like organelles had an evolutionary advantage? a. They were able to photosynthesize C. They were immune to bacterial b. They had more DNA invasion d. They were able to make more use of available energy 4. Experiments conducted by Mille and Urey, and by others after them, have demonstrated that molecules for life could have been produced in Earth 's early atmosphere. These molecules include amino acids, carbohydrates, lipids, ATP and nucleotides of DNA and RNA. Which of the following suggests how the genetic material of cells may have evolved to give instructions for the functioning and replication of cells? a. A spark of electricity can catalyze chemical reactions that produce proteins from DNA. C. Cells link amino acids together into proteins, using instructions carried in the DNA and enzymes to catalyze the reactions. b. RNA, like enzymes, can catalyze chemical d. reactions, and some RNA molecules could be self-replicating. Chains of nucleotides form when water evaporates from a solution of nucleotides. 5. Mitochondria provide evidence that eukaryotic cells evolved through endosymbiosis. What features of mitochondria support this theory? are similar in size to bacteria a. Mitochondria contain their own DNA and C.Mitochondria have been found throughout the fossil record. b. Cells that contain mitochondria also contain chloroplasts and chloroplast membranes are similar to bacterial membranes. d. Mitochondria can be produced when sparks of electricity are passed through an environment of gases similar to the conditions of carly Earth

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1. **a. one prokaryotic cell engulfing another prokaryotic cell.** The endosymbiotic theory proposes that mitochondria and chloroplasts were once free-living prokaryotes that were engulfed by another prokaryotic cell, forming a symbiotic relationship. 2. **c. synthesis of organic molecules.** Before life could arise, the basic building blocks (organic molecules) needed to be present. Genetic material, photosynthesis, and cell membranes came later. 3. **d. They were able to make more use of available energy.** Mitochondria are the powerhouses of the cell, enabling more efficient energy production through aerobic respiration. This provided a significant advantage over anaerobic respiration. 4. **b. RNA, like enzymes, can catalyze chemical reactions, and some RNA molecules could be self-replicating.** This refers to the RNA world hypothesis, which suggests that RNA, not DNA, was the primary genetic material in early life due to its ability to both store information and catalyze reactions. 5. **a. Mitochondria contain their own DNA and are similar in size to bacteria.** The presence of independent DNA and the similarity in size to bacteria strongly support the idea that mitochondria were once free-living prokaryotes. The other options are either incorrect or don't directly support the endosymbiotic theory in the same way.

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