As bones age in older persons, they
a. have increased calcium deposits.
b. become stronger.
c. are less porous.
d. are more brittle.
e. increase in length.
D
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The basic tool of genetic regulation is the ability of certain proteins to bind to specific
A. regulatory RNA sequences. B. regulatory DNA sequences. C. repressor parts of the gene. D. promoter parts of the gene. E. enzymes of the cell.
The degree of susceptibility a food has to microbial activity is determined by its
A) chemical characteristics. B) physical characteristics. C) water content. D) chemical characteristics, physical characteristics, and water content.
Which of the following is the best hypothesis for the honeybee study?
a. Honeybees navigate using the sun. b. Patients undergoing anesthesia during surgery are often disoriented when they awaken. c. Isoflurane interferes with the functioning of an organism’s biological clock. d. Both mammals and honeybees have biological clocks that are similar in function.
Degradation of organic matter is influenced by ________.
A. nutrient availability B. the nature of the microbial community present C. abiotic conditions D. All of the choices are correct.