Does anxiety serve a purpose?
a. No, it almost always causes ulcers and other health problems.
b. Yes, it almost always improves performance and energy level.
c. Yes, it warns us of threat or danger so acts as an alarm.
d. No, it causes us to avoid and escape when we should confront.
C
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Teens rate school-based sexuality as their leading sources of sex information
a. True b. False Indicate whether the statement is true or false
Most of the coherence in text is created by
a. inference. b. syntax. c. parsing. d. phoneme restoration.
What is the function of the placenta?
to screen out potentially harmful substances to exchange blood between the mother and the developing embryo to protect and nourish the developing fetus to create antibodies for the developing fetus
Proteins that circulate in the blood, specifically attaching to one kind of antigen are ____.
A. macrophages B. B cells C. T cells D. antibodies