If you have ever used a compass, you know that it can be used to navigate. it does this with a needle that always points north, so you know which direction you are heading. the needle points to the north because earth is like a giant magnet, with both north and south poles. according to current theory, the creation of earth's magnetic field is closely linked to

Can you identify which of the following groups of organisms are, or are not, populations? a. the american bison (bison bison) and grey wolves (canis lupus) currently living in yellowstone national parkb. all of the rainbow trout (oncorhynchus mykiss that) that have ever lived in lake eriec. the group of american bison (bison bison) currently living in yellowstone national parkd. a group of calliope hummingbirds (selasphorus calliope) and a group of rufous hummingbirds (selasphorus rufus) living in the same new hampshire woodse. the northern cardinals (cardinalis cardinalis) living on opposite shores of lake champlain f. all of the whales currently living in the atlantic ocean off cape cod, massachusetts

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

Physical characteristics of down syndrome