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Give the letter of the arrow below that is pointing to the distal convoluted tubule.

The arrow marked “B” below is pointing to the renal cortex.

Human males have _________ sex chromosome in their normal body cells.

Which of the following class of macromolecules is nonpolar?

How does your DNA differ from mine?

What are two reasons to be optimistic about growth in the EU over the next decade?  What are two reasons to be pessimistic?   Only Answer 1 of the 20pt questions

The marginal propensity to consume is:

Assume we are in a recession and the Federal Reserve keeps nominal interest rates at zero. Further, assume that imports grow when consumption grows. Expansionary fiscal policy in the United States will probably lead to [check all that apply]

Variable inflation has higher costs than stable inflation with the same average.

Free junior college tuition fees in the United States is a cost-effective way to increase college enrollment. (Background: Tuition and fees are already low for public junior colleges in the U.S., but there is still positive.)