Jams, jellies, preserves, honey, and other foods with high sugar content hardly ever become contaminated by bacteria, even when the food containers are left open at room temperature. This is because bacteria that encounter such an environment ____
A) undergo death as a result of water loss from the cell
B) are unable to metabolize the glucose or fructose, and thus starve to death
C) are obligate anaerobes
D) are unable to swim through these thick and viscous materials
A
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The chromosomes are aligned at the spindle equator during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
Are there ways to prevent cancer?
A. No, cancer cannot be prevented; it can only be treated. B. No, cancer cannot be prevented or treated. C. Yes, cancer can be prevented, but only with intense exercise. D. Yes, there are many ways cancer can be prevented, including through a healthy diet and exercise.
The negative logarithm of the hydrogen ion concentration in the solution is referred to as
A. electronegativity. B. specific heat. C. pH. D. atomic mass. E. OH- concentration.
Which layer of the digestive tract is actually in contact with the food?
A) muscularis externa B) mucosa C) serosa D) submucosa