Nine small cells have the same volume (take up the same amount of space) as a certain large cell. Which has more cell membrane for nutrients and wastes to pass: the one large cell or the nine smaller cells?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above