Explain how humans obtain the energy and matter they need in order to survive. HINT: Think about the chemical bonds and what happens to atoms in your body.

What is turgor pressure, what causes it, and what does it do for a plant?

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.

Some substances but not other can cross the (blank) membrane of a cell