1. Why does it matter that there are no wolves in the park? 1. Why do you think that each population is higher or lower than normal?

1. What would adding bees to the park do?

1. What would adding wolves to the park do?

Which was the best option to get the populations back in check?

"d.) carbon dioxide and hydrogen sulfide"

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.