Question

Which of the following does NOT restrict the growth in the number of cells? nutrients available, the variation in atmospheric pressure, internal regulation, or space available.

Answer 1

don't the all coinside with the growth of cells?

Answer 2

internal regulation. Because nutrients put them on a exponential rate, because there is unlimated sources so cross that out, the variation in atmospheric pressure give competition between consumers so the rate might decrease, and space avaliablity, if there is too much species and no room they are going to die. So its internal regulation. :)