What was depleted by the time that oxygen became abundant

Find the mean and range 26 19 23 399 31 34 25

Which amusement park ride utilizes periodic motion a. slide b. bumper cars c. giant swing d. roller coaster

Margaret, a vegetarian, is looking for a mushroom with a meaty texture to grill and eat instead of a hamburger. which of the following mushrooms would you recommend?                 a.  lobster      b.  matsutake      c.  shiitake      d.  portobello