1 As we understand it now, which describes the earth when Life began to form? a.

Question

1 As we understand it now, which describes the earth when Life began to form?

a.      There was no water.

b.      The atmosphere was an oxidizing one.

c.       Carbon could have come from CO2 (carbon dioxide) or CH4 (methane).

d.      Energy for abiotic synthesis of biochemicals most likely came from sunlight.

2. What property of life do liposomes exhibit?

a.      homeostasis                                                                                              c.       a complex organization of biochemicals

b.      response to the environment                                                            d.      nucleic acid-based heredity

3 Which supports the endosymbiotic theory?

a.      Bacterial and Archaeal cells have membranous organelles.

b.      Mitochondria have 80s ribosomes.

c.       Chloroplasts have circular DNA.

d.      Bacterial and Archaeal ribosomes have 70s membranes.

4 In sedimentary rocks, which layer is farthest from the surface?

a.      Cenozoic                                                                                                      c.       Paleozoic

b.      Mesozoic                                                                                                     d.      Proterozoic

Explanation / Answer

1. The correct option is (d) energy for abiotic synthesis of biochemical most likely came from sunlight.

2. The correct option is (d) nucleic acid-based heredity.

3. The correct option is (c) chloroplasts have circular DNA.

4. The correct option is (a) Cenozoic

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