The percentage of individuals have no antigens on their RBCs is
the individuals that have 3 types of antigens on their RBCs.

a) >
b) ≥
c) <
d) ≤

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.