As PCBs move up the trophic level in food chains, of food web, their concentration increases. What is that called?

The model illustrates a process by which a substance is taken up by a cell

1) strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. this type of vegetative reproduction is known as a) pollination. b) fragmentation. c) binary fission. d) vegetative propogation.

Types of scientific inquiry that biologist engage in that cannot be completely controlled