Retroperitoneal Organs Have a Serosa Facing the Peritoneal Cavity and A(n)

question 2

Multiple Choice

Retroperitoneal organs have a serosa facing the peritoneal cavity and a(n) on the posterior side embedded in the abdominal wall.

• A) mesothelium
• B) caveolae
• C) adventitia
• D) vasa vasorum
• E) muscularis externa

---

Definitions:

Paralogs

Genes within the same organism that have evolved by duplication and may have different functions.

Gene Family

A group of genes sharing a common origin that typically encode proteins with similar functions.

Molecular Clock

A method used to determine time based on base pair substitutions. Molecular clocks use the rates of molecular change to deduce the divergence time between lineages in a phylogeny, for example. They work best when they can be “calibrated” with other markers of time, such as fossils with known ages and placements.

Synapomorphy

A trait that is shared by two or more taxa and their most recent common ancestor, used to infer evolutionary relationships.