Why is estrogen more stable than testosterone?
Estrogen contains an aromatic ring that makes it more stable than testosterone.
Why is active transport nessecary in membrane dynamics?
Not all molecules are able to passively transport into a membrane. Active transport allows for the manipulation of energy to move molecules from low to high concentratons.
How does the Production Possibility Frontier illustrate efficiency
The production possibility frontier illustrates the trade-offs facing an economy that produces two goods. If an economy is efficient it will produce a point on the production possibility frontier.