1. Differences among individual members of the same species are referred to a a. variation
c. natural selection
b. fitness
d. adaptation

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

which

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!