Problem: Text: In cell biology, the cytoplasm is the material within a living cell, excluding the cell nucleus. It comprises cytosol (the gel-like substance enclosed within the cell membrane) and the organelles -- the cell's internal sub-structures. All of the contents of the cells of prokaryotic organisms (such as bacteria, which lack a cell nucleus) are contained within the cytoplasm. Within the cells of eukaryotic organisms the contents of the cell nucleus are separated from the cytoplasm, and are then called the nucleoplasm. The cytoplasm is about 80% water and usually colorless.

Question: are cytoplasm and cell membrane the same thing?

OPTIONS:
- no
- yes
A: no

Problem: Text: In optics, a real image is an image which is located in the plane of convergence for the light rays that originate from a given object. If a screen is placed in the plane of a real image the image will generally become visible on the screen. Examples of real images include the image seen on a cinema screen (the source being the projector), the image produced on a detector in the rear of a camera, and the image produced on an eyeball retina (the camera and eye focus light through an internal convex lens). In ray diagrams (such as the images on the right), real rays of light are always represented by full, solid lines; perceived or extrapolated rays of light are represented by dashed lines. A real image occurs where rays converge, whereas a virtual image occurs where rays only appear to converge.

Question: can a real image be obtained on a screen?

OPTIONS:
- no
- yes
A: yes

Problem: Text: In baseball in the United States and Canada, the seventh-inning stretch is a tradition that takes place between the halves of the seventh inning of a game -- in the middle of the seventh inning. Fans generally stand up and stretch out their arms and legs and sometimes walk around. It is a popular time to get a late-game snack or an alcoholic beverage as well, as vendors end alcohol sales after the last out of the seventh inning. The stretch also serves as a short break for the players. Most ballparks in professional baseball mark this point of the game by playing the crowd sing-along song ''Take Me Out to the Ball Game''. Since the September 11 attacks, many American ballparks complement or replace the song with the playing of ''God Bless America.'' If a game goes into a fifth extra inning, a similar ''fourteenth-inning stretch'' is celebrated (as well as a possible ''twenty-first inning stretch'' or ''twenty-eighth inning stretch''). In softball games, amateur games scheduled for only seven innings, or in minor-league doubleheaders, a ''fifth-inning stretch'' may be substituted.

Question: do all baseball teams sing the 7th inning stretch?

OPTIONS:
- no
- yes
A:
no