Researchers Are Conducting a Study to Determine the Effects of Vitamin

question 60

Multiple Choice

Researchers are conducting a study to determine the effects of vitamin C on the human immune system.The study involves providing pills that contain vitamin C to one group of human subjects and pills that do not contain vitamin C or other active ingredients to another group of people.The pills that do not contain the vitamin are

• A)supplements.
• B)placebos.
• C)probiotics.
• D)antidotes.

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Definitions:

Iron-bearing Minerals

Minerals that contain iron as a significant component, often influencing the rock's color and magnetic properties.

Rounded Pebbles

Small, smooth rocks that have been eroded and smoothed over time by water or other natural forces.

Shells

Shells are hard, protective outer layers created by animals, particularly mollusks such as snails, oysters, and clams, as a form of protection or body support.

Well Sorted

A condition of sedimentary particles that display a narrow range of sizes due to the action of transport and deposition processes.