Science is a subject that is constantly growingconstantly grows . I am the kind of person who isa curious person. MyWhose brain is always growing with knowledge. Since, I was young I have always had an interest in the animals I saw in the woods, or the fish I saw in the lake. I wanted to watch them live and see what they dodid . Biology is a science that is the study of ever-changing life. Life itself is an ever-changing thing. New things can be learned every day. New species can form any second. In my brain , and in my mind those changes bring new things can be learned and new ideas can be formedlearnings and ideas . Science has always been and interest tointerested me because of the never ending knowledge.
Your sentence structure needs variation. There is also a lot of redundancy in your sentences. We know science is a subject, that you are a person, and that biology is a subject.
By being interestedMy interest in biology as a young girl I have gainedgave more knowledge than a person who just began learning. As a kid, I used to ask my parents to buy all of the science books at book fairs they would have at school book fairs . I would want the mini labs that they would demonstrate like digging for dinosaur bones in sand. I looked forward to learning more.
More vivid detail would add to this paragraph. Do you have an anecdote you remember?
Throughout middle school, I longed to get into high school so I could learn more. The middle school science classes in middle school were too simple for me.: They were very slow moving and I just wanted to learn as much as I could. When high school startedFreshman year I got intotook the sophomore biology course as a freshman even though it was a sophomore level class . I waited for that class to come every day because I knew that biology wasI enjoyed the biological branch of science that I enjoyed the most. While other kids were grossed out by the dissections of the squid or the frog, I was pre-occupied with all of the new things to learn! For example, I was so excited to learndiscover that the squid has a plastic-like spine, or that... . I wasn't the girl who was afraid of touching a dead frog. I didn't care. All I wanted to do was learn.
Watch out for repetition of words in near-by sentences.The story reveals more about your character than merely describing what you like about science. Making the whole paragraph an anecdote would be stronger than talking about your love of science because it shows the reader, rather than telling them:
"Freshman year I took the sophomore Biology class, looking forward to it every day. While the teacher droned to other students, I ate up the lectures which fed my eager mind. While other students squirmed at the frogs and squids ready for dissection, I dove in, incising and prodding; I marveled at the squid's plastic spine and the frog's maze of arteries. While some merely learned, I experienced.
To me, science is the most important subject. It is always expanding. In science, new things are discovered every day. I am the kind of person who wants to know all of the new things. I am interested in science because it is by far the most exciting thing to learn about.
This paragraph is unneeded. By now, your essay should already have told your reader why science interests you, and this just serves as a cliched ending.