The reactant is called the substrate
Answer:
There are two types of melanin--eumelanin and pheomelanin. In general, the more eumelanin in your skin, the darker your skin will be. People who make more pheomelanin than eumelanin tend to have lighter skin with freckles. Like many other traits, the amount and kind of pigment in your skin is controlled by genes
Explanation:
Answer:
An organism that regulates it's temperature internally is the Ectotherm
I pretty sure that it include both biotic and abiotic. But "C" is wrong. Now your answers are between "A,B and C"
