Which situation would be most likely to cause a DNA mutation? A. A wood frog in a lake is exposed to temperatures below 0°C during the winter months. B. A culture of cells is placed in a chamber and exposed to high pressure for 10 hours. C. A person spends one hour each day under the ultraviolet rays of a tanning bed. D. A maple tree becomes dormant to prevent water loss during a drought.

thermophiles, notice the prefix thermo.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.