The net movement of uncharged, polar molecules across a semipermeable membrane from a low concentration to a high concentration occurs by diffusion
(a) true
(b) false

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

that is wrong, its not thymus.

not only is it colder, it also becomes darker, less salty, and more dense.

not always but somethings can be reproduced in a laboratory.