The outermost region of the kidney is called the:a
adventitia.
b. mucosa
c. pelvis.
d. cortex.
e. medulla.
d
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The reason to use lacZ in the creation of a fusion gene for studying gene expression is:
A. the lacZ gene product binds to the activator domain increasing gene expression. B. the lacZ gene product is easily measured. C. the lacZ gene product interferes with the DNA binding domains of repressor proteins. D. the lacZ gene product will form a leucine zipper with the other domain of the fusion gene product.
Foraging bees communicate with other bees in a waggle dance to give information about the food. The important cue in the dance that conveys information about the required flight direction to the food source relative to the hive-sun direction is the
A. angle between the waggle run in reference to the hive-sun angle. B. angle between the waggle run in reference to the direction north from the hive. C. angle between the waggle run and the vertical axis within the hive. D. angle between the food source and the hive in reference to the sun. E. speed of the waggle dance.
IgE antibodies are best described as
A) a cause of basophil and eosinophil degranulation. B) the antibodies found in body secretions. C) those involved in complement activation. D) the trigger for antibody-dependent cellular toxicity (ADCC). E) the most common type of antibody in the blood during the initial phases of an immune response.
A more or less circular ring of mushrooms appears in your yard, apparently overnight. The circle is several yards in diameter. The most likely explanation for this circle of mushrooms is that:
A) the mushrooms are all part of the same organism, with mycelia radiating out from the location of a germinated spore. B) a circle is nature's most perfect shape for asexual reproduction structures. C) the fungus produces a toxin in the center to prevent too many mushrooms from being produced. D) one mushroom in the circle reproduced sexually to make all the other mushrooms in the circle.