1. Can be both A&D because one is the right pulmonary artery and the other is the left pulmonary artery. Each providing for a separate lung.
The changes in foot structure in a bird population over. Evolution leads to less complex organisms. And also the lock-and-key model.
One should consider: proper clothing and shoes-so not to get injured. Knowledge of equipment and activity—one should know how to use all equipment and know how to play the games/activity so not to hurt themselves or others. Proper hydration and nutrition before hand-so not to get dehydrated or dizzy or sick and safety og equipment and location-check for broken items and discard, check environment for hills, holes, sticks, traffic, etc.
What are the similarities and differences between Judaism Christianity and Islam?<span>Here are a few major ones that these religions share similarities: Belief about God.Judaism, Christianity, and Islam are monotheistic religions, namely they believe that there is only one God. Jews and Muslims greatly stress the oneness and unity of God.</span>