How is a theory formulated? What will be an ideal response?
Theories are formulated using the scientific method. Observations and data are gathered to test the
problem. Tentative explanations, also called hypotheses, are then formulated to explain the
observations and data. More tests are done and the data are analyzed. If the data show that the
hypothesis is not correct, it is tossed out. If the data all support the hypothesis, there are no significant
data refuting it, and it is accepted by scientists, it becomes a theory.
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Which of the following is true of pyruvate kinase?
A) It is activated by AMP. B) It plays a key regulatory role in glycolysis. C) both a and b D) neither a nor b
Which of the following is NOT among the reasons why world cities are typically targets of terrorism?
A) The perpetrators and their groups are not from urban areas B) The symbolic value — prestige is associated with penetrating sites of power. C) The impact value — targeting urban infrastructure has the potential to be much more destructive. D) The political and social reverberations are greatest and have the potential to spread the most fear.
El Nino events are caused by a dramatic increase in barometric pressure over large portions of the eastern Pacific.
Indicate whether the statement is true or false.
Dunes that develop in response to dominant winds from two directions separated by an acute angle would be called:
a. barchanoid ridges b. linear dunes c. star dunes d. parabolic dunes