Answer to Question 1
The corporation issuing a bond or a stock is the seller in a primary market, while anyone who holds a stock or bond can sell in the secondary market.
Answer to Question 2
The government provides healthcare services because the marginal social benefit of healthcare exceeds the marginal benefit perceived by its consumers, Consumers underestimate the benefit of healthcare because they underestimate the health risks they face. They also underestimate their future needs for healthcare. And some people cannot afford the healthcare they need. For these reasons the majority of voters want healthcare to be available on need rather than on the ability and willingness to pay
Polyketides as secondary metabolites
Many types of edible fungi are grown for the market.
The primary pulse points of the body.
Secondary syphilis rash.
Iraqi market
Secondary growth