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Origins Of Life, Bacteria, Protists, Plants, Fungi Essay

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Below is an essay on "Origins Of Life, Bacteria, Protists, Plants, Fungi" from Anti Essays, your source for research papers, essays, and term paper examples.

Origins of life, Bacteria, Protists, Plants, Fungi

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

____ 1. Which putative early Earth condition did Miller and Urey's experimental apparatus not attempt to simulate directly?
a. | presence of water vapor |
b. | intense lightning storms |
c. | warm seas |
d. | intense UV bombardment |
e. | reducing atmosphere |

____ 2. The early atmosphere of Earth probably retained all of the following molecules in substantial amounts except
a. | H2. |
b. | CH4. |
c. | CO2. |
d. | N2. |
e. | H2O. |

____ 3. Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?
a. | liposomes |
b. | liposomes with selectively permeable membranes |
c. | oligopeptides and other oligomers |
d. | protobionts that use DNA to program protein synthesis |
e. | amino acids |

____ 4. Although absolute distinctions between the "most evolved" protobiont and the first living cell are unclear, biologists generally agree that one major difference is that protobionts could not
a. | possess a selectively permeable membrane boundary. |
b. | perform osmosis. |
c. | grow in size. |
d. | perform controlled, precise reproduction. |
e. | absorb compounds from the external environment. |

____ 5. Which of the following statements about the origin of genetic material is most probably correct? The first genes were
a. | DNA produced by reverse transcriptase from abiotically produced RNA. |
b. | DNA molecules whose information was transcribed to RNA and later translated in polypeptides. |
c. | self-replicating, catalytic RNA molecules. |
d. | RNA produced by autocatalytic, proteinaceous enzymes called ribozymes. |
e. | protobionts produced by dehydration syntheses of nucleic acids. |

____ 6. All are true of the photosynthetic machinery of cyanobacteria, except
a. | it involved a...

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