Which of the following statements about solid solution minerals is true?
a. two minerals with the same chemical composition can have different internal structures
b. a mineral can have a variable internal structure depending on the chemical composition
c. two ions can substitute in a mineral in various proportions without changing the internal structure
d. none of the above
c
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Where in a mammal would there be the highest concentrations of phosphorous?
a. liver and pancreas b. muscle tissues c. bones and teeth d. central nervous system e. hair and skin tissues
____ connect(s) atoms by sharing the energy of paired electrons
a. Covalent bonds b. Hydrogen bonds c. Cohesion d. Adhesion
The most recent glacial period, called the ____________________, began about 2.5 million years ago
Fill in the blank with correct word.
Radiation can act as a mutagen because it
A. Deactivates the immune system B. Represses oxygen uptake C. Interferes with the activity of nerve cells D. Damages genetic material in cells E. Causes muscles to grow at unusual rates