From a modern genetic perspective, this is defined as evolution.
<span>The three types of mountains are volcanic, fold, and block.</span>
Homeostasis is maintained by the respiratory system in two ways: gas exchange and regulation of blood pH. Gas exchange is performed by the lungs by eliminating carbon dioxide, a waste product given off by cellular respiration.
It is the circulatory system and respiratory system.
Answer:
Regions of the digestive system can be divided into two main parts: the alimentary tract and accessory organs.
Explanation: