Which one of the following is true about scientific knowledge?
A) Scientific knowledge is derived from careful thinking about the way things must work based on application of a few fundamental principles.
B) Scientific knowledge is not absolute, because the possibility is always held open that new experiments may one day prove it wrong.
C) Scientific knowledge is acquired though teachings passed on by great scientists.
D) When based on many experiments, scientific knowledge is absolutely true.
E) Scientific knowledge is derived from the strongest arguments made by the brightest scientists.
Answer: B
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Saturated fats have long, straight tails of fatty acids and can clump tightly together in cells and animal bodies. Unsaturated fats have kinks in their tails due to double bonds, which prevent them from packing together as tightly. Animals that are ectotherms (their body temperature fluctuates with the environment) need to keep their membranes fluid at cooler temperature and thus use in their membranes.
A. mostly unsaturated fats B. mostly saturated fats C. equal amounts of saturated and unsaturated fats D. carbohydrates E. proteins
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1.use protein as their genetic material. 2.engage in metabolic activity. 3.require oxygen. 4.are made up of more than two cells.
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