Explanation:
Food and liquids are processed by the digestive system. After nutrients are absorbed during digestion, the excretory system removes solid waste products, or feces, through the rectum. The excretory system also works with the respiratory and circulatory systems and removes carbon dioxide (CO2) from the body.
The answer is Speciation cannot occur in the absence of mutation. Speciation cannot occur in the absence of natural selection
Aggergate is usually found in:
Floodplains
Alluvial fans
Mines
The correct answer will be the second one Growth of a tumor
Atom, cell, tissue, organ
