If you wanted to study the various shapes of different kinds of bacteria, you could use
A) the unaided eye.
B) a light microscope or the unaided eye.
C) a light microscope or an electron microscope.
D) an electron microscope, but not a light microscope.
C
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Suzie throws a ball at an upward angle. Ignoring air resistance, which component of velocity remains constant over time?
A. The horizontal component. B. The vertical component. C. Both change. D. none of the above
During Spanish colonial times in Latin America, the social rankings from highest to lowest were
A. Peninsulares--Criollos--Mestizos B. Mestizos--Peninsulares--Criollos C. Criollos--Mestizos--Peninsulares D. Criollos--Peninsulares--Mestizos
The isotope composition of ________ in foraminifera shells from sediment cores are used to determine climate change in Earth history.
A. oxygen B. carbon C. lead D. helium E. uranium
Which of the following may result in a positive feedback mechanism that would intensify climate change?
A) Warmer temperatures result in increased evaporation of water, leading to an increase in cloud cover. B) At higher temperatures, trees increase rates of photosynthesis. C) A large volcano emits huge quantities of sulfate aerosols into the atmosphere. D) An increase in rainfall results in increased plant growth. E) Warmer temperatures result in the melting of permafrost.