Darwin's ideas on evolution were advanced for his time. His approach to science and natural selection were supported by what main tenet?
A. Species were unchangeable over the course of time.
B. Operation of natural laws produces constant change and improvement.
C. Various organisms and their structures resulted from a spontaneous action.
D. The world is fixed and constant.
B. Operation of natural laws produces constant change and improvement.
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Which two parameters most influence the location of biomes?
A. altitude and latitude B. latitude and temperature C. temperature and precipitation D. precipitation and altitude E. precipitation and latitude
There is NO convincing fossil evidence for
which of the following? a. evolution b. extinction c. change d. catastrophism e. uniformitarianism
Enzymes that cleave DNA at specific sites are called ________.
A. restriction endonucleases B. DNAses C. peptidases D. vectors
Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.
A. 100 percent yellow-green seeds B. 100 percent yellow seeds C. 50 percent yellow, 50 percent green seeds D. 25 percent green, 75 percent yellow seeds