In Discussing Stable Isotopes, Which Are Used to Study Global $\delta$

question 26

Multiple Choice

In discussing stable isotopes, which are used to study global chemical cycles, the symbol $\delta$ is used to relate the isotopic composition of

• A) istopically heavy to istopically light samples.
• B) istopically light to istopically heavy samples.
• C) unknown samples to a standard sample to which all others are compared.
• D) unknown samples to the average of all samples for the study at hand.

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Definitions:

Chlamydia

A common bacterial STI caused by bacterium Chlamydia trachomatis that can lead to PID in women.

Trichomoniasis

A sexually transmitted infection caused by the parasite Trichomonas vaginalis, characterized by genital inflammation, discomfort, and discharge.

Herpes Simplex 2

A viral infection, often referred to as genital herpes, that primarily affects the genital and anal area and is spread through sexual contact.

Parasitic Protozoan

Single-celled organisms that live and feed on other living organisms, often causing diseases.