4. Which organelle is important to sorting and packaging substances in the cell into vesicles? a. Lysosomes
b. Golgi bodies
c. Rough ER
d. Smooth ER

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Which statement about the immune system is false? a. lymphocytes reduce inflammation, b. b cells remember specific pathogens. c. most white blood cells kill bacteria d. white blood cells are made in lymph nodes.

Which event would lead to primary succession of a forest?