A chondrocyte divides and the two daughter cells begin producing extracellular matrix to separate them. This is an example of:

A. she must wear hats a lot
Wearing hats has no scientific link to causing or expressing genetic baldness.

B. she must produce enough testosterone
Male pattern baldness is an androgen-dependent trait, meaning that even if a woman inherits the gene, it requires the presence of testosterone (or dihydrotestosterone, DHT) to be expressed. Elevated androgen levels in women (e.g., in PCOS) may trigger expression.

C. she must dye her hair
Hair dye affects only the external hair shaft and has no genetic or hormonal influence on baldness.

D. she must produce enough estrogen and progesterone
Estrogen and progesterone actually have protective effects on hair. Decreased levels of these hormones (e.g., after menopause) may unmask androgenic effects, but they do not directly cause male pattern baldness expression.

A. ground substance
This is a major component of the ECM, consisting of water, proteoglycans, and glycoproteins that fill the space between fibers and cells.

B. cytoplasmic inclusions
These are structures found inside the cell (e.g., glycogen granules, lipid droplets), not in the extracellular matrix.

C. fluid
Interstitial fluid (extracellular fluid) is part of the ECM and facilitates nutrient and waste exchange.

D. protein fibers
Collagen, elastic, and reticular fibers are key components of the ECM that provide strength, flexibility, and support.