All of the following types of evidence support the hypothesis that life on Earth formed spontaneously except for __________.
a. the discovery of ribozymes, showing that RNA molecules may be autocatalytic
b. laboratory studies involving the formation and reproduction of vesicles
c. the fossil record
d. the abiotic synthesis of polymers from monomers dripped onto hot rocks
e. the production of organic compounds in S. Miller's experimental apparatus.
Answer: c. the fossil record
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How many hydrogen bonds are formed between adenine and thymine?
a. 1 b. 2 c. 3 d. 4 e. 6
Ribozymes may have originally developed by ____
a. ATP synthesis b. the chance assembly of RNA molecules c. cellular respiration d. glycolysis e. electron transfer systems
Herbivores are ____ energy transfer(s) away from the sun
a. one b. two c. three d. four e. five
Which of the following is the genetic condition
observed in the middle person from the above figure? a. Huntington disease b. acondroplasia c. triple recessive condition d. galactosemia e. all of these