Unlike Eutherians, Both Monotremes and Marsupials ________

question 45

Multiple Choice

Unlike eutherians, both monotremes and marsupials ________.

• A) lack nipples
• B) have some embryonic development outside the uterus
• C) lay eggs
• D) are found in Australia and Africa

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Definitions:

Attenuation Reflex

The reflex mechanism that protects the inner ear from damage by reducing the transmission of sound, particularly for loud sounds, through the contraction of muscles around the ossicles.

Scala Vestibuli

A fluid-filled chamber in the cochlea of the inner ear; it lies above the scala media and begins near the oval window.

Scala Tympani

A spiral-shaped canal in the inner ear that forms part of the cochlear duct, important for the transmission of sound vibrations.

Tectorial Membrane

The tectorial membrane is a structure in the inner ear of mammals that plays a crucial role in the hearing process by interacting with the hair cells of the organ of Corti.