What is the primary function of a cellular membrane?
a. recognizing other cells as being "like"
b. controlling the transport of substances into and out of cells
c. recognizing chemical signals from other cells
d. cell-cell binding
Ans: b. controlling the transport of substances into and out of cells
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Despite acidic conditions, some microorganisms have been found residing within the human stomach.
Answer the following statement true (T) or false (F)
Before the advent of biotechnology, diabetics would use insulin harvested from cows. Now they receive human insulin produced through ________.
A. gel electrophoresis B. gene therapy C. PCR D. recombinant DNA technology
The increased concentration of toxins as they move up through the food chain is called ____
a. biological magnification b. eutrophication c. biological accumulation d. deposition e. desertification
Which of the following would be considered appropriate exercise for a seriously obese individual to help lose weight?
What will be an ideal response?