The diagram shows a certain kind of cell with all of its major parts labeled.

Which statement is supported by the diagram?

The cell must be eukaryotic because it has a cell membrane and a cell wall.
The cell must be prokaryotic because it has a cell membrane and a cell wall.
The cell is eukaryotic because it does not have any membrane-bound organelles.
The cell is prokaryotic because it does not have any membrane-bound organelles.

It may help to have the diagram, but the last one makes the most sense.

Explanation:

The main differences between prokaryotic and eukaryotic cells are that eukaryotic cells have a nucleus and membrane-bound organelles, and prokaryotic cells do not have either.  

B) Leukopenia decreases the body's ability to fight infection.  

The condition Leukopenia results due to decrease in the count of the white blood cells. It results typically due to the decrease in the number of neutrophil. White blood cells are important for maintaining the immunity within a human body. These cells protect the body against the foreign invaders like bacteria, viruses hence, prevents infection. As, the number of white blood cells decreases the body's ability to provide protection against foreign invaders decreases and hence, infection occurs.

Therefore, B) Leukopenia decreases the body's ability to fight infection is correct.