According to the Endosymbiotic Theory, what type of cell was the "first cell"? Explain which cells were engulfed and which cells are more complex. Provide 2 forms of evidence that support the
Endosymbiotic Theory.

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