I'm not saying this is for sure but this is what I'm answering for mine thanks to a yahoo answers. d) Migrating bird populations and the carry capacities of local animal species. You don't have to award points or anything I just wanted to try and help. This is what I put on another persons questions as well. I hope this is helpful and accurate. I'm sorry if it is not.
Answer:its a covalent bond
Explanation:
The random movement of molecules across a concentration gradient until the difference in concentration between two regions is near zero.
Im thinking it's active transport :) hope it helps.
Lawn and farming fertilizer is harmful to the enviroment due to the abundance of chemicals. When it rain or seeped underground, the fertilizer leaked into the nearby lake and thus, all the fish died to the chemicals in the fertilizer.
The tree creates a vacuum in the vessels by transpiring water from the leaves and that causes water to be sucked up by the roots. The forces of adhesion and cohesion also help with this.