What letter depicts the petiole?

Which letter points to the spore producing structures of a mushroom?

Which part of the microscope do you look through?

A form of connective tissue in which the cells are specialized for the synthesis and storage of energy-rich reserves of fat, or lipid.

Isotopes of the following elements are most common in PET imaging except for:

PET scan is more efficient for collecting gamma-ray photons in image formation compared with SPECT.

In SPECT,

In an isomeric transition, a nucleus releases energy by converting a proton into a neutron and emitting a positron.

A sample contains 9879432567 atoms.  If 60 atoms of the sample decay in 5 s, what is the radioactivity of the sample?   

BONUS: What was the “title” applied to the ruler of the Ottoman empire?  Who was the most decorated American veteran from WWI?  What killed more people in 1918-19 than WWI?  What was the name of the document created in 1917 that gave Great Britain primacy over Israel?  On which Italian island did the mafia originally start?