An experiment for a new asthma medication was set up into two groups. group one was given the new drug for asthma, while group 2 was given a sugar pill. the sugar pill serves as a:

The sugar pill serves as a control.

The control in experiments is a sample that remains the same throughout the experiment and it is used to compare the results of the main experiment to. It serves to guarantee that changes noted in the experiment are from the variables introduced and  not something else.  

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?