Your plant is starting to flower.
Or is there something more specific you are seeking the answers to?
Further to what Nor Cal Cannabis said, the little "bumps" are resin exudations that contain the THC, among other compounds, that get you "stoned".
Try going to the Grow Diaries home page and clicking on the heading titled "Journal". This is a blog section which will give you many more pieces of information designed to help people understand their Cannabis plants. Hope this helps....
Organoman.