Linnaeus' concept of kinds differed from ours today in holding that:
o a kind may be a species, genus, or family
o a kind is a genus
o variation may exist within a kind
o variation does not exist within a kind

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

Describe how an electric generator works

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity