Proteins on the surface of vesicles determine where the vesicles go. which cell organelle provides the instructions for these proteins? a. endoplasmic reticulum b. lysosome c. mitochondria d. nucleus the answer is not a !

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?