The sterol ____________________ is a vital component of all cell membranes and is used to synthesize steroid
hormones. Fill in the blank(s) with the appropriate word(s).
ANSWER: cholesterol
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During what step of glycolysis are two ATP molecules required?
A. Cleavage and rearrangement B. Glucose priming C. Oxidation D. Pyruvate formation E. Acetyl-CoA formation
Some species of bean bug, which are common pests on soybean plants, can acquire resistance
to a common herbicide by nurturing protective bacteria in their gut. The bacteria grow well in the gut, do not cause any harm, and receive all their nutrients from the bean bug. This is an example of __________.
a. commensalism b. mutualism c. predation d. parasitism
Which of the following is a density-dependent population-controlling factor?
A) tsunami B) influenza outbreak C) volcanic eruption D) earthquake
The pylorus is located at the exit of the:a
stomach. b. esophagus. c. jejunum. d. duodenum. e. rectum.