3. What is the relationship between S- and P-waves? 4. How did the study of earthquake waves lead to a greater understanding of the interior
structure of Earth?

What process creates gametes? a.fertilization b.mitosis c.meiosis

In a leaf, dermal tissue a) stores food b) stores carbon dioxide c) releases oxygen into the air d) transports water from the roots

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?