Which measures the mass of an object? a)a spring scale (in n) b)a height scale (in feet) c)a graduated cylinder (in ml) d)a triple beam balance (in grams)

Punctuated equilibrium verses gradualism have long been contested as ways in which species evolve. choose the best evidence for gradualism.

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models