1. Clay soil forms a fairly effective barrier against the movement of water. It also swells and shrinks significantly as its water content changes. Sandy soil, in contrast, allows water to move freely and does
not change shape as the water content varies. In which statement is the appropriate soil selected for its
intended site?
O Sandy soil would make a good lining for a toxic waste site
O Clay soil would work well in a drain field
O Clay soil would be a good foundation for a large building
O Clay soil would form a good liner if a person built a pond

Illustrate, label, and explain how atmospheric carbon and oxygen find there way into a consumer and then back into a producer. include the following terms in your illustration: co2, 02, respiration, photosynthesis, sugar, mitochondria, chloroplast, water, solar radiation

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

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.