How do we get energy from the food we eat

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Each member of a class sampled a piece of ptc testing paper. thirty people sampled the chemical. twenty persons were tasters. how many had heterozygous genes? 10 20 0-20 indeterminate