What is the result of crossing over, as shown in the illustration? o the chromosomes replicated o the chromosomes condensed o the genetic variation increased o the spindle fibers aligned the chromosomes

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale

Fredrick griffith made a scientific discovery in 1928

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.