Reference Slide:  Low magnification.  Arrow indicates region enlarged in next photo.        Identify the ORGAN indicated by the arrows.   

*How is natural selection related to sexual reproduction as opposed to asexual reproduction?

______________________ is the exchange of oxygen and carbon dioxide between blood in systemic capillaries and tissue cells.

In the absence of geographic barriers, ________ speciation may occur when reproductive isolating mechanisms develop between two populations.

The wings of birds and insects share similar functions but evolved from different structures; therefore, these wings are said to be

You want to know how much protein you have in your solution, and you have a spectrophotometer.  You think there is 5 mg of protein. How can you determine the protein concentration? 

The final step in a Sanger DNA sequencing reaction is to run the DNA fragments on a gel. What purpose does this serve?

The solutions in the two arms of this U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Side A is half-filled with a solution of 2 M sucrose and 1 M glucose. Side B is half-filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on both sides are equal. After the system reaches equilibrium, what changes are observed?

Identify the STRUCTURE (not the cells) indicated by the arrow.   

Answer the questions in numerical order