^ Buddy, your pics are good in general, so I'm only gonna put the ctitique here
1) The pollen stick is out of focus, and it looks like you were photographing a flower that was higher than you. So maybe it'd be better to take this shot from the side, so that you can get some sort of focus for the pollen grains too. Also advisable is to shoot later in the evening, the sun is a bit too harsh here.
2) Again, harsh sun. Maybe go for tighter framing and slightly sideways angle.
3) No comments.
4) This one is a nice shot. Not much to improve IMO, maybe, just maybe, use picasa to straighten the image a tiny bit. You could try this experiment though it needs a tripod or having the camera placed firmly on some support. Get the aperture to be very small at some thing like f18 or lower. Then basically experiment with the image exposure duration until you get a shot with proper exposure. The benefit here is that you get the lights to sparkle like this:-
*farm9.staticflickr.com/8385/8545969568_9acd80c5e7_z.jpg
IMG_1966 by pranav0091, on Flickr
Don't be disheartened by the critique. Since the pics are decently good enough to start off, I just focused on the negatives here (negatives according to me)
And regarding how to get images to show inline, I upload them to flickr and use their "share" option. Then choose BBCode with a resolution thats not too large or small like 640
@ Anmol: Nice pic. Very good use of the selective coloring technique