On a light microscope, what do you adjust to maximize the amount of light entering the objective lens and minimize the amount of light lost to refraction?
A) Fine focus
B) Ocular lenses
C) Objective lens
D) Condenser position
D) Condenser position
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Some scientists predict that as atmospheric carbon dioxide levels increase, the pH of the oceans will drop, thus threatening coral and organisms within shells. What is the best explanation for this hypothesis?
A. Carbon dioxide combines with water to form a base. B. Carbon dioxide combines with water to form an acid. C. As the oceans warm, more water is evaporated, lowering the pH of the remaining water. D. As the pH of the ocean decreases, more carbon dioxide is released into the atmosphere. E. As the pH of the ocean increases, more carbon dioxide is released into the atmosphere.
Which one of the following is a mismatch between tissue system and function?
a. ground tissue?photosynthesis b. vascular tissue?storage c. dermal tissue?covering of plant body d. ground tissue?storage e. vascular tissue?transport
A scientific theory has which of the following properties?
A) It agrees with available evidence and all alternative hypotheses have been ruled out. B) It cannot be rejected. C) It has been absolutely proven. D) It does not need to be altered in the light of new evidence.
Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.
Answer the following statement true (T) or false (F)