Paramecia are single -celled organisms that reproduce sexually and asexually . How is a paramecium able to reproduce sexually ? (1 ) by breaking into different pieces that grow into adults ( 2) by splitting in half to form two identical paramecia (3 ) by exchanging genetic material with another paramecium ( 4) by acquiring new genes through mutation

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.