When an excise tax is introduced on a good (creating a “wedge” between the price a consumer pays and a producer receives for it), why does deadweight loss result?

This phylum contains the earthwoms and leeches

This phylum contains the brittle star and sea cucumber

Millipedes belong to the phylum Annelida because of their segmented body

Plants undergo an alternation of generations. This means that the ________ produces spores, which develop into the ________.

Which best defines alternations of generations?

Regarding socialization and the brain, the authors argue that _____.

A 50 kilogram man stands on a massless board with a boy on the other side.  The board balances.  What is the mass of the boy?  Express your answer as a number only without units.  

The __________ theory of motivation suggests a connection between internal physiological states and outward behavior.

Which of the following statements is true about hypospadias?