NES biology exam prep questions with correct answers

Statistical analysis of data from field experiments supports the conclusion that an investigators hypothesis about the role of sea stars in an intertidal community is valid. Which of the following statements is true? CORRECT ANSWER Further experimentation or observation could still discredit the hypothesis. In which of the following cases would a circle graph be the most appropriate format for presenting data? CORRECT ANSWER Comparing the percentage of several types of prey in the diet of an owl species. A laboratory exercise requires the separation of cells from the liquid culture medium they have been grown in. Which of the following laboratory procedures would be most effective at achieving this separation? CORRECT ANSWER A centrifuge In bird species, the percentage of young successfully raised by the parents each year tends to be inversely proportional to the number of eggs laid. Which of the following graphs best represents the type of data on which this statement is based? CORRECT ANSWER A certain plant cell is 70 micrometers long. This is equivalent to how many centimeters? CORRECT ANSWER 7.0x10-3 cm The validity of the results of a scientific study can most directly be assessed by asking which of the following questions? CORRECT ANSWER Can the methodology used in the study be replicated by an independent researcher? The general acceptance of Robert Koch's work linking cholera and the pathogen that causes it was important in the history