Besides plants and animals, wood and can be to release carbon into the air.
fossil fuels, compacted
fossil fuels, eaten
coal, eaten
fossil fuels, burned

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.