The rejected status seems to be a technical error. It seems you have not put the article in published mode and it is still in draft mode as per the message which appears at the top of the article page, namely "This article is not published yet. The author may be still working on it. Please check back later." Hence, actually, the article has not even been seen by any editor.
What you need to do -
1. Via the 'Edit link' button provided, choose the option 'Article is ready to Publish' at the bottom of the page.
2. Then click on the submit button.
Now it will appear in the queue of articles under new submission and the article editors will review it. I would advise you, though, to first re-check the entire article for spelling and grammar errors. You could use the free Grammarly tool which the Webmasters have provided for members. I can also see typo errors, such as 'us' instead of the word 'is'.
It would be good to put a better title for SEO purposes, that is, which would attract traffic. It is also required to put a summary of a few sentences in the box provided for it. Ensure, too, that you check if any of the content is also appearing at another site as copied text will not be accepted.
A few suggestions: The opening paragraph can be put under a heading of 'Overview' or 'Introduction'. Then put a heading 'Colours of biotechnology' with h2 tags and the subsequent colour-related biotech types with h3 tags. Similarly, put 'Role of biotechnology' in h2 tags and the subsequent fields in h3 tags. In case the editor who reviews it has further suggestions, the article will be put in pending, with the suggestions appearing in a blue box at the bottom. In case the article is shifted to pending for further grammar or other corrections, the reasons for pending will appear at the top of the article for you to know.
When people come at you with their worst, you should come at them with your best (advice given to Selena Gomez by her mother, quoted in Time magazine.)