Which of the following traits does the fossil above share with modern birds? 
Definitions:
Exocrine Glands
Exocrine glands are glands that release their secretions through ducts directly into external environments or body surfaces, such as sweat, salivary, and digestive glands.
Intracellular Receptors
Intracellular receptors are proteins located within cells that bind to certain substances and mediate changes in gene expression.
Aldosterone
A chemical secreted by the adrenal glands which plays a role in managing blood pressure through the regulation of sodium and potassium concentrations in the body.
Cholesterol-based
refers to substances or structures derived from or containing cholesterol, a type of lipid that is an essential component of cell membranes and precursor of steroid hormones.
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