The Evolution of Which Class of Molecules Played an Important

question 48

Multiple Choice

The evolution of which class of molecules played an important role in the development of multicellular organisms? ​

• A)G proteins
• B)protein kinases
• C)second messengers
• D)ligand-gated ion channels
• E)steroid hormones

---

Definitions:

Areolae

The pigmented skin areas surrounding the nipples. Each person has two, which can vary in size, color, and texture.

Vaginal Walls

The inner lining of the vagina, consisting of mucous membranes, muscle tissues, and fibrous tissues, providing elasticity and support.

Vulva

The collective term for the external female genitals.

Labia Majora

The outer folds of skin surrounding the vulva in female anatomy, serving as a protective barrier for the inner reproductive and sexual organs.