A handful of good biology pictures I discovered:
Biology Fieldtrip to the Blanca Wetlands
Image by RWayne
Biology!
Image by nickoneill
On a pole outdoors Slim’s
Biology
Image by ShutterSparks
No Photoshop or manipulation, just cropping.
Those velvety greenish points are not debris. The water and bubbles are clean. It is an optical effect that results from the lighting angle.
convert this post to pdf.