A Researcher Discovers a Fossil of What Appears to Be

question 37

Multiple Choice

A researcher discovers a fossil of what appears to be one of the oldest-known multicellular organisms. The researcher could estimate the age of this fossil based on

• A) the amount of carbon-14 in the fossil.
• B) the amount of uranium-238 in the fossil.
• C) the amount of carbon-14 in the sedimentary rocks in which the fossil was found.
• D) the amount of uranium-238 in volcanic layers surrounding the fossil.
• E) the amount of uranium-238 in the sedimentary rocks in which the fossil was found.

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Definitions:

Suctioning

The process of removing mucus and other bodily fluids from a patient's airway to prevent or relieve obstruction and maintain adequate ventilation.

Trendelenburg Position

A medical position where the patient is laid flat on their back with the legs elevated higher than the head, often used to facilitate venous return in certain conditions.

Infection Susceptibility

The increased likelihood or tendency of an individual to contract infections due to various factors such as immune deficiency.

Immunoglobulin A

A class of antibodies found predominantly in the mucosal linings of the body, playing a critical role in immune function by protecting against pathogens.