In all organisms, the coded instructions for specifying the characteristics of the organism are directly determined by the arrangement of the A. twenty kinds of amino acids in each protein
B. twenty-three pairs of genes on each
chromosome
C. strands of simple sugars in certain
carbohydrate molecules
D. four types of molecular bases in the genes

Which of the following is true about the introduction of a non-native species to an environment? (a) they usually adapt quickly so they can have a positive affect on the environment. (b) they can disrupt the environment and cause much damage and devastation to native species. (c) they usually become predators in a food chain and to keep prey populations under control. (d) because the native species are better-adapted to the environment, the non-native species always end up dying out.