There are many definitions for Bio technology.
Here's how you can write it

1) Define bio-techonology, history..how the people used it in the ancient days like using Alchohol for treatment of wounds

2) Uses of biotechnology (you will find many). <= Write a lot on this..spam!

3) Limitations of biotechnology.

You're done

EDIT: Also add about the cloning, tissue culture stuff and some pics to increase the content