When moving upward on an energy pyramid from one level to the next, what happens to the usable energy in an
ecosystem?
Olt increases by about 10%.
O It increases by about 90%.
O li decreases by about 10%
Oli decreases by about 90%.

This map shows the member states of the european union (eu). based on this map, what is the most likely reason the eu was formed? a) to increase trade between european nations b) to protect themselves from foreign enemies c) to begin the process of forming one large nation d) to isolate europe from the rest of the international community j

Read the following quote from the nature conservancy, “the 3 billion people who live in poverty around the world will be hardest hit by climate change. the poor are more dependent on natural resources and have less of an ability to adapt to a changing climate. diseases, declining crop yields, and natural disasters are just a few of the impacts of climate change that could devastate the world’s most vulnerable communities.” from this quote, what group of people is most vulnerable to climate change? those who depend on industrialized nations people who are able to adapt to changing conditions people living in central america people who are living in poverty

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4