Santee Cooper is stocking lakes Marion and Moultrie with 109,000 sterile grass carp. The grass carp, which eat hydrilla (invasive species), are the most effective and least intrusive means to control the weed. What type of control are they using? A.
physical
B.
chemical
C.
invasive
D.
biological

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