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23.  Food substances that produce a stress-like response are known as:

5.   Which of the following statements defines the endocrine system?

Who developed the classification system that divides galaxies into spiral, elliptical, and irregular and classifies spirals by the size of their nuclear region and the tightness of winding of their arms?

Our view of the universe is a limited one because of what fundamental fact?

The primary evidence for the expanding universe concept is

A rotating black hole is called what?

29.   Seeking to dominate or to get your own way at the expense of others is known as _____.

The distance to the bright quasar 3C 273 is estimated to be

30.  Sacrificing your own needs or wants to meet someone else’s needs or wants is known as _____.

26.    Chronic stress can deplete the vitamins we take into our bodies.