A Researcher Discovers a Fossil of What Appears to Be

question 12

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 uranium-238 in the fossil.
• B)the amount of carbon-14 in the fossil.
• C)the amount of uranium-238 in volcanic layers surrounding the fossil.
• D)the amount of carbon-14 in volcanic layers surrounding the fossil.

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Definitions:

Anatomical Differences

Variations in the structure of organisms' bodies that distinguish between species, genders, or individuals.

Body Mechanics

The use of correct posture and movement in daily activities to prevent injury and maintain bodily health.

Good Posture

This refers to the alignment of the body in a position that reduces stress on the muscles, spine, and ligaments during movement or while stationary.

Fibrous Disk

A type of cartilaginous joint found between the vertebrae in the spine that acts as a shock absorber.