The biochemical oxygen demand (BOD) test is primarily a measure of carbon demand and should not include nitrogen oxidation demand.
Answer the following statement true (T) or false (F)
True
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In an aquatic microbial community where a photoautotroph, chemoorganoheterotroph, and nitrogen fixing bacterium are present, predict an environmental perturbation that would cause only one to be outcompeted by the other two groups and explain how each group would respond
What will be an ideal response?
A substance that accelerates the rate of a chemical reaction is call a(n)
a) catalyst b) lipid c) molecule d) element
Adaptive immunity is sometimes also called acquired immunity. Which of the following statements provides a basis for the alternative name?
A. Lymphocytes of the adaptive immune system are highly specific for a single epitope. B. Activated lymphocytes produce daughter cells that are identical in specificity and function. C. To become activated, lymphocytes require exposure to the epitope for which they are specific. D. Activated lymphocytes may persist for years in the body. E. Lymphocytes reactive to normal body components are removed.
The chemical characteristics or reactivity of an element depend mostly on the _______.
Fill in the blank(s) with the appropriate word(s).