Soil and dirt are terms can be used interchangeably. Soil is only made up of non-living minerals and weathered rock
A. True
B. False
B. False
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The resolving power of a microscope is described as the ability of the microscope to
A. separate clearly two objects that are very close together. B. magnify an object. C. separate the colors of an organism's internal structure. D. see structures at various depths in a tissue.
rRNA sequence comparisons are useful for determining evolutionary relationships
Indicate whether this statement is true or false.
Some insecticides interfere with the removal of acetylcholine from the synaptic cleft. What effect will this have on muscle contraction?
A) The muscle cell will lose all of its supply of calcium. B) The muscle cell will be unable to be stimulated again. C) The muscle cell will be in a state of constant stimulation, leading to a tetany response. D) The muscle cell will have a single twitch and will be unable to contract again.
Why do iron-oxidizing bacteria oxidize large amounts of iron?
a. Iron is plentiful. b. Iron oxidation requires a large amount of ATP. c. Fe2+ to Fe3+ yields only a single electron. d. At neutral pH, the bacteria must compete with abiotic oxidation of iron.