Which organism appeared on earth first? a)gastropods b)horn corals c)branchiopods d)crinoids

Which is the graph of the piecewise function f(x)? f(x) = image for option 1 image for option 2 image for option 3 image for option 4

If people from georgia have just experienced an extremely cold winter the last couple of months, what would the climate most likely be classified as? polar temperate maritime tropical

Why are human population trends difficult to predict?