Explain how the wound healed itself over time

Which blood cell spend most of their time in the lymphatic system?

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000

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?