According to most car mechanics, plain water is the best coolant to use in an engine provided the engine is not being exposed to freezing temperatures. If the car is subject to freezing temperatures then a mixture of water and ethylene glycol (antifreeze) is recommended but it does not cool as efficiently as plain water. Why would ethylene glycol reduce the cooling efficiency of water?
A. Hydrogen bonds in water allow high levels of heat absorption and a large increase in temperature.
B. Ethylene glycol raises the freezing point of water.
C. Ethylene glycol has a lower heat capacity than water.
D. Ethylene glycol has a higher heat capacity than water.
C
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A graduate student is researching the spread of mosquito vectors and dengue fever into the southern United States. She has collected a substantial amount of data regarding the locations where the vector has been detected as well as the incidence of the dengue fever virus in both the vector population and in humans. What application would enable her to effectively illustrate patterns of vector and disease spread?
A. Geographic Information Systems B. DNA microarrays C. Remote sensing D. DNA fingerprinting
The pigments responsible for the color of red algae are the prodigiosins
Indicate whether the statement is true or false.
Which monomer units combine to form polysaccharides?
A) amino acids B) fatty acids C) nucleotides D) sugars
Refer to Figure 53-2. At which point on the graph is the population increasing exponentially?
a. A
b. B
c. C
d. D
e. There is no exponential increase on this graph.