Undergraduate / 'Each course ended with a major project' - Describe what leadership means to you [18]

Yes, I believe your last paragraph isn't as strong as well. If I were you, I would write as much as I can considering that you are given 500 words max.

Undergraduate / "Qualities that make me successful in bachelor of science"-Deadline in >24 hours [10]

Yes, I believe that is necessary for you to write more about qualities than real life experiences on the first paragraph question.