What are two types of bonds are found in DNA and where do you find them?

How does food concentration affect yeast activity

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?

Besides regulating what enters and leaves the cell, what is another function of your choice from question #1?