The Platypus and Echidna Are the Only Living Forms of ________

question 76

Multiple Choice

The platypus and echidna are the only living forms of ________ mammals.

• A)prototherian
• B)therian
• C)eutherian
• D)none of the above;they are not mammals

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Definitions:

Sex of Child

Refers to the biological distinction of being male or female assigned to a child at birth.

Sonogram

An imaging method that uses high-frequency sound waves to produce images of structures within the body, often used in pregnancy.

Ultrasound

A medical imaging technique that uses high-frequency sound waves to create images of structures inside the body.