Identify the initial source of energy for all life on earth

The importance of the mind as a part of the body is an example of:

Which test would show positive results for orange juice

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked