Why are individuals with hiv able to contract diseases that are rare to the rest of the populations?
a) hiv releases pheromones that attract the rare diseases.
b) hiv releases substances that increase the strength of the disease causing organisms
c) people with hiv are unable to fight off these rare diseases.
d) people with hiv are more often exposed to these rare diseases.

What is called the "building block" of life?

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above