Diffusion is the movement of atoms or molecules from regions of high concentration to regions of low concentration
a. True
b. False
a
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The feature of carbon important for producing a diversity of organic molecules is
A. carbon can form up to 2 covalent bonds with other elements. B. carbon bonds are stronger than any other bond. C. carbon can form both polar and nonpolar covalent bonds with various elements. D. carbon bonds cannot be broken in the range of temperatures associated with life. E. carbon can form hydrogen bonds with water.
What structure best represents a polymer?
A. A fatty acid. B. A monosaccharide. C. A nucleotide. D. An amino acid. E. A protein.
Which statement is false?
a. Calcium is the most important mineral involved with bone tissue turnover. b. Osteoblasts and osteoclasts are involved with the reabsorption and repair of bones. c. Bone mass decreases with age. d. Males have greater problems with loss of bone tissue than females do. e. Marrow fills the cavities in the spaces of the spongy bone and in the center of the shaft of the bone almost as quickly as the spaces are formed.
The spontaneous ending of a pregnancy that results in the premature expulsion of the embryo is termed a(n) ________
Fill in the blank(s) with correct word