Question 17 (3 points) When setting up an experiment, why is it necessary to have a control group?
to have a group to compare to the experimental group
to have a group to experiment on
it's really not that important
to have a group for backup in case the procedure goes poorly

true                                                                                                       true true true true true true

maybe because its impossible for balloons to lift a whole entire house.

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide