Depends where you’re applying to. Generally, anywhere in the 1800-2200+ is considered relatively high.
Your examples are quite vague; be more specific! Instead of talking about “DNA,” perhaps talk about genome sequencing or the fact that we can nowadays identify diseases or disorders by looking at insertions or mutations in the chromosomes, etc. Your example with the solar system is also vague.
Additionally, there are multiple spelling and grammatical errors (“In fact” is two words, should be “its guidance,” and “precise”).
I’d probably give it a 3 (out of 6).