Which of the following diseases is always caused by a virus? A.

athlete's foot

B.

AIDS

C.

Down's syndrome

D.

cancer

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

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

What is true of sea slugs in these orders