Which of the following statements does NOT describe the adaptive immune response?
a. It is specific.
b. It occurs immediately after the body is challenged by foreign material.
c. It is systemic.
d. It has memory.
Ans: b. It occurs immediately after the body is challenged by foreign material.
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The immediate causes of behaviors, such as genetic and physiological mechanisms are called __________ causes.
A. proximate B. ultimate C. internal D. physiochemical E. internal and physiochemical
Which of these bonds are weak individually but are much stronger as a group?
A. Covalent B. Ionic C. Neutron D. Hydrogen E. Ionic AND Hydrogen
Which term is used to describe the overall 5?-to-3? direction of linked nucleotides in a DNA chain?
A) complementarity B) sequence C) polarity D) primacy
An atom having a filled valence shell is stable and unreactive
__________________ Indicate whether the statement is true or false.