There are a couple organelles that are found in plant cells, but not in animal cells. These include cell wall, large central vacuole, and chloroplast
I would say Ambition because it sounds like the person is reaching for a goal they want to achieve
Since plasma cells make your antibodies, they need to produce a lot of protein. Also because the nucleus makes a lot of products to make proteins you need a large Golgi Body. How ER's relate to this: to do protein synthesis you need ribosomes and to have ribosomes you need the rough ER!