Answer: The liver regulates most chemical levels in the blood and excretes a product called bile.
Explanation:
Proteins, among the most complex of all organic compounds, are composed ofamino acids , which contain carbon, hydrogen, oxygen, and nitrogen atoms. Certain amino acids also have sulfur atoms, phosphorus, or other trace elements such as iron or copper.
Answer:
Crossing Over and Independent assortment
Explanation:
Answer: Photosynthesis and the food chain.
