Amino acids are molecules which contain both an amino group and a carboxyl group. Which atomic species must be present in all amino acids?
A) C and H
B) C, H and N
C) C, H and O
D) C, H, N and O
D
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Describe the formation of coal deposits. What environmental conditions are required to produce
these deposits? Why is coal important? What will be an ideal response?
Consider a certain carboxylic acid at physiological pH of about 7.4. Assume the following general reaction. HA(aq) + H2O(l) ? H3O+(aq) + A-(aq) What will happen to the ratio of the deprotonated to protonated form, respectively, if the pH of the solution drops to 6.2?
A) It will decrease. B) It will increase. C) It will remain constant. D) It will decrease then increase since it is a buffer.
What factor does NOT contribute to the initiation of an ice age?
A. variety of tectonic movements B. change in Earth’s rotation speed C. Milankovitch cycles D. solar output changes E. atmospheric circulation changes
What does the acronym ENSO stand for? Describe the weather patterns in the U.S. as a result of ENSO.
What will be an ideal response?