Insulin is produced by the:a
beta cells of the islets of Langerhans.
b. alpha cells of the islets of Langerhans.
c. cortical cells of the adrenal gland.
d. neurons in the hypothalamus.
e. lobules of the liver.
A
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Agrobacterium infects plants and causes them to form tumors. You are asked to determine how long a plant must be exposed to these bacteria to become infected. Which of the following experiments will provide the best data to address that question?
A) Determine the survival rate of Agrobacterium when exposed to different concentrations of an antibiotic. B) Measure the number of tumors formed on a plant when exposed to various concentrations of Agrobacterium. C) Measure the concentration of Agrobacterium in different soil environments where the plants grow. D) Measure the number of tumors formed on plants, which are exposed to Agrobacterium for different lengths of time.
What has been the general trend of the world's catch usage? a. Increased fishmeal production
b. Decreased fishmeal production. c. Increased human consumption. d. None of these choices.
Involves study designs used to answer why? and how?
a. analytic epidemiology b. descriptive epidemiology c. differential epidemiology d. none of the above
Which of the following statements regarding the endomembrane system is false?
A) The endomembrane system is involved in the synthesis, storage, and export of important molecules. B) The endomembrane system includes the rough and smooth endoplasmic reticulum. C) The endomembrane system includes the nuclear envelope. D) The endomembrane system is a system of interrelated membranes that are all physically connected.