What molecule is NOT involved in appetite regulation?
A. leptin
B. insulin
C. ghrelin
D. alpha-melanocyte-stimulating hormone
E. secretin
F. neuropeptide Y
E. secretin
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When salt dissolves in water as illustrated in the figure above, the water molecules form ____ around
the Na+ and Cl? ions.
a. covalent bonds b. hydration layers c. nonpolar interactions d. membranes e. ionic bonds
The unique attractive forces that keep molecules of water together are called:
a. strong forces. b. adhesion. c. hydrogen bonds. d. cohesion. e. weak nuclear forces.
A disorder caused by nondisjunction of chromosome 21, resulting in a trisomy 21 child, is
A) Down syndrome. B) hemophilia. C) cystic fibrosis. D) color deficiency.
Male gametophytes are produced by which of the following processes?
A. gametogenesis B. microsporophyte generation C. meiosis D. neither mitosis nor meiosis E. mitosis