Some people in an office building are experiencing nausea and vomiting. Which of these strategies would not help reduce the pollutants that may be responsible for these symptoms?

A)

providing smoking workers with an area where they can smoke

B)

cleaning the ventilation system of the building

C)

cleaning areas in the building that may have biological irritants

D)

changing the insulation material used in the building

E)

finding sources of heavy-metals pollution and developing a plan to decrease their effect

Explain light independent reactions

What are characteristics of minerals? select 3 choices

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.