The three most important differences between plant and animal cells are that plant cells
A. have small vacuoles, cytoplasm, and lack mitochondria
B. have cell walls, chlorophyll, and a large, central vacuole
c. vary greatly in appearance, have a cell membrane, and mitochondria
D. lack chloroplasts and ribosomes, and have an irregular shape

answer: i cant find your answer. do u have another way i can answer it for you : )

explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves