Carbon, an important element for life, keeps cycling between the spheres of the earth. carbon dioxide in the is absorbed by the oceans and is used by aquatic organisms for biological processes. but aquatic organisms return some of it back through .

Which system revise and send electrical signals throughout the body

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

Which direction does the energy flow in this energy pyramid ?