Aheterotrophic multicellular organism that does not have cell walls is called a(n)
a. animal
b. plant
c. virus
d. bacteria user: a sponge can drop a piece of itself on to the floor of the ocean and the little piece then grows into a new individual. this is an example of
a. sexual reproduction
b. excretion
c. budding
d. regeneration

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?