Help with 9th grade bio homework!!?

im in 9th grade bio nd i totally get how u feel! im not sure about part a... but for the next part go to the cell biology link, its the first link at the left of the page. go to cell models and under the prokaryotic description is a link to "take me to the bacteria cell".. pretty much tells ya everything u need to knw. for part c go to the same page but instead of clicking the bacteria link, click the link under the eukaryotic to "take me to the animal (or plant) cell." its a labeled model with descriptions of each organelle. you can compare both models, plant and animals to see which organelles are exclusive to which cell, etc.