Which experiment would most likely contain experimental bias?
a
a student tests the attraction of bees to flowers by placing four different flowers in the same location and counting how many
bees visit each.
b.
a company that makes pain relief medication tests the effectiveness of their own medicine compared to that of three other
brands.
c.
a lab performs a test by giving bacterial colonies the same amount of different antibiotics and growing them under the same
conditions.
d.
a chemistry class performs an experiment in which each reaction has the same amount of starting material and begins at the
same temperature.
reset
reset
diest
viest

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa.which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.