Digital rectal examination, or DRE for short. "Digital" refers to the use of digits (fingers) into the rectum to palpate (feel) the prostate's surface contours.
I think you forgot to give the options related to the question. So it becomes a bit hard to answer the question perfectly, still i would do my best and hope that it comes to your help. Prior to the ideas presented by Charles Darwin concerning evolution, several alternating theories had been developed and they included all but the DNA differences within a species lead to some individuals being better able to survive. This theory was developed after Darwin came up with his theory..
A staphlyococcus cell is prokaryotic
Effects on Waterways
Fertilizers contain large amounts of nitrogen and phosphorus. When these chemicals runoff agricultural fields into waterways, they can lead to accelerated growth of aquatic plants. Nutrients from fertilizer runoff encourages the growth of nuisance algae through the process of eutrophication.