What is the BEST way for a scientist to address his/her own biases?
a) make sure that no biases influence his/her work
b) use careful controls to minimize them
c) understand his/her biases and interpret the data differently as a result
d) never be involved in any kind of scientific study where his/her possible biases might impact the study
e) none of the above is correct; there is no way a scientist can deal with biases
Ans: b) use careful controls to minimize them
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What is the function of the group of amino acids on the RNA polymerase, called the rudder?
A) It provides the energy required for formation of phosphodiester bonds in the elongating RNA molecule. B) It helps unwind and open the DNA molecule. C) It moves template and non-template strands of DNA through channels inside the enzyme. D) It helps sigma bind to the RNA polymerase molecule.
Long necks make it easier for giraffes to reach leaves high on trees, while also making them better fighters in "neck wrestling" contests. In both cases, which kind of selection appears to have made giraffes the long-necked creatures they are today?
A. Directional selection B. Stabilizing selection C. Disruptive selection
Suppose that you extract all of the proteins of a leaf and measure the percentage that is rubisco. What percentage of the leaf proteins will the rubisco comprise?
a. 10% b. 25% c. 50% d. 75%
Organisms that feed on dead organisms for nutrients are called
A. lithoautotrophs. B. phototrophs. C. saprobes. D. autotrophs. E. parasites.