What is the primary function of the carbon cycle

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

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

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from