These differences may be of significance in assuring that larvae and adults of the same species do not engage in direct competition for food or living space. Examples of metamorphosis include the tadpole, an aquatic larval stage that transforms into the land-dwelling frog (class Amphibia). Starfishes and other echinoderms undergo a metamorphosis that includes a change from the bilateral symmetry of the larva to the radial symmetry of the adult. Metamorphic patterns are well-known in crabs, lobsters, and other crustaceans and also in snails, clams, and other mollusks.
In addition to income taxes, everyone must pay Social Security and Medicare taxes. If you are self-employed you need to make these tax payments yourself since you donât have an employer to send it in for you. For 2015, employees pay 7.65 percent of their income in Social Security and Medicare taxes with their employers making an additional payment of 7.65 percent.
Self-employment tax is designed to account for the fact that self-employed individuals don't have Social Security and Medicare taxes taken out of their paychecks. When you work most jobs, your earnings are taxed at a 6.2% rate for Social Security and 1.45% for Medicare.