The specific heat of water is
a. a gram of substance.
b. energy required to raise a gram of substance 1? F.
c. calories need to heat seawater.
d. energy required to raise a gram of substance 1? C.
e. energy required to evaporate 1 gram of liquid water.
D
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Viruses are the cause of various diseases such as polio, HIV, or the flu. However, viruses are also very helpful to our environment. In what way can viruses be beneficial to the environment?
A. Viruses caused the evolution of singlecelled eukaryotes through horizontal gene transfer, thereby limiting the number of these microorganisms in soil and water. B. Viruses limit the bacterial infections in animals by causing mutations within the bacterial genome. C. Viruses limit the number of viral infections in animals by mutating other viruses on contact. D. Viruses limit the number of bacterial infections in plants by causing the mutations within the plant genome. E. Viruses aided evolution of bacterial and archaeal genomes and limit the number of other viruses and other microoganisms in soil and water.
In oxidation-reduction reactions, all of the following
are true EXCEPT a. one molecule gives up electrons. b. one molecule gains electrons. c. cells release energy. d. the molecule that accepts electrons is oxidized. e. hydrogen ions are usually released.
Four of the five structures listed below are sinks for
pressure-flow translocation. Select the exception. a. fruits b. roots c. mature leaves d. seeds e. rapidly growing tissue
The roots of about 10% of all kinds of plants are involved in symbiotic associations with certain kinds of fungi.
Answer the following statement true (T) or false (F)