A group of students run a simulation of resource consumption in which cereal is used to model a resource. The students use tweezers to pick up pieces of cereal one at a time and place them in a cup. The group runs the simulation two times, keeping all factors the same except the number of students allowed to collect the cereal at the same time. What variable are the students most likely testing?

A. Conservation method
B. Use of technology
C. Evenness of distribution
D. Population size

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.

Sickle cell amelia is a condition condition where the red blood cells are deformed which is affected by sickle cell amenia

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil