What is an example of centripetal acceleration? HELP ASAP!

When the cell concentrates potassium within, against the natural tendency of matter, it is performing a.passive diffusion b.facilitated diffusion c.active transport d.pinocytosis

The more rapidly sedimentation occurs, the more likely it is that the remains will successfully form a fossil. as sedimentation continues, what happens to the amount of weight settling onto the organism? stays the same increases decreases cuts in half

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates