Which of the following acts as the digestive system of the cell, breaking down materials?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Which of the following is a responsibility of a scientist

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