What term describes the time it requires for exactly one-half of a given amount of a radioactive isotope of an element to decay?

A. half-decay
B. decay time
C. decay product
D. useful dating range
E. half-life


Answer: E

Biology & Microbiology

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Bile, which aids in the digestion of fat, is stored in the ____

Fill in the blank with the appropriate word.

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A microbiologist must culture a patient's feces for intestinal pathogens. Which of the following components would likely be present in a selective medium for this purpose?

A. NaCl B. Thioglycolic acid C. Bile salts D. Peptone E. Sheep red blood cells

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Which feature is found in sponges that classify them as animals? a. Organs b. Symmetry c. None of these features are found in sponges

d. Heterotrophs e. Tissues

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Soil in regions with high rainfall or in low-lying areas associated with poor drainage form through the process of

A) laterization. B) calcification. C) gleization. D) podzolization.

Biology & Microbiology