A Cline

question 29

Multiple Choice

A cline:

• A)is continuous variation that follows a continuum.
• B)is variation that falls into discrete categories.
• C)describes the pattern of occurrence of trisomy 18.
• D)was used to describe human variation as early as the Renaissance.

---

Definitions:

Membranous Urethra

The portion of the urethra that passes through the urogenital diaphragm, extending from the prostatic urethra to the spongy urethra.

Pelvic Cavity

A body cavity that is bounded by the bones of the pelvis and contains reproductive organs, the urinary bladder, and the rectum.

Corpora Cavernosa

Paired erectile tissues in the penis or clitoris that fill with blood during sexual arousal, leading to erection.

Scrotum

The pouch of skin containing the testicles in male mammals.