Answer:
Brain.
Explanation:
When you become too cold, your hypothalamus will signal your brain to raise the temperature.
Answer:
Genes
Explanation:
Genes are segments of DNA that code for a specific protein or RNA molecule.
Answer: amino acids combine in different ways to form proteins with different shapes, and this affects which molecules can bind to it, which in turn directs the protein's function.
Explanation:
Melanin- a large group of related molecules responsible for many functions so like pigment of the skin, hair and eyes
Carotene - pigments that are oxygen-free. Most are hydrocarbons (hydrogen and carbon ONLY) their colour varies from yellow to orange to red
