Although most competition is subtle, under which of the following circumstances would interspecific competition be most obvious? answer unselected when a foreign organism is first introduced into a community unselected among species whose trophic levels are different unselected in a stable, long-established ecosystem unselected when organisms have quite different ecological niches unselected when resources are most abundant

where is the map so i can

it apply by theyre artifacts

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.