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. Ethylene glycol has a higher heat capacity than water.
B. Ethylene glycol raises the freezing point of water.
C. Ethylene glycol has a lower heat capacity than water.
D. Hydrogen bonds in water allow high levels of heat absorption and a large increase in temperature.
Answer: C
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a. increased digestive processes b. the formation of a tumor in the adrenal medulla c. increased heart rate d. increased blood flow to the kidneys and intestines e. decreased blood flow to the heart
When you increased the predation rate, did the prey isocline go up or down, i.e. did the number of predators required to maintain the prey population at zero growth increase or decrease?
a. It went down. b. It went up. c. It didn't change.
Among mammals, the home range is usually larger for
A) carnivorous species than for herbivorous species of the same body size. B) females than males of the same species. C) immatures than for adults of the same species. D) smaller species than for larger species.
Most enveloped viruses use the host ________ membrane as their envelope source.
A. plasma B. mitochondrial C. nuclear D. None of these choices are correct.