In an aquatic ecosystem, the algae and phytoplankton are responsible for primary productivity. all but one factor usually influences the primary productivity of a marine ecosystem. that is a)water salinity b)light intensity c)water temperature d)available nutrients

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Which of the following human activities resulted in the growth of the north american deer population?

Are the layers of rock above and below the coal older or younger?