What Does the Term Menarche Refer To

question 29

Multiple Choice

What does the term menarche refer to?

• A)the maturation of secondary sexual characteristics in both sexes
• B)the onset of menstruation in females
• C)the onset of sperm production in males
• D)genital maturation in both sexes

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Definitions:

Earliest Vertebrates

The earliest vertebrates are ancient species that represent the origin of vertebrate animals, including fish, which possess a backbone and are foundational to the evolution of more complex vertebrates.

Jaws

The bony structure in the head of most vertebrates that holds the teeth and is used for biting and chewing.

Chordate Nerve Cord

The Chordate Nerve Cord is a dorsal, hollow nerve cord found in all chordates, including humans, that develops into the spinal cord and brain.

Ventrally

Pertaining to the belly or underside of an animal or organism; the opposite of dorsally, which refers to the back or upper side.