This should be an example of genetic drift.
The brown spotted deer would spread their genes more than the white spotted ones which would eventually lead to them completely overpowering genetically the white deer in future generations.
When Denise mixed the blood with water, it formed Osmosis. There is water in the blood as well as a concentration of salt.
Books.. GOogle..Bing.... oh Wait BRAINLY
one reason for the decline inthe population of marine iguqnes is that invasive speciesnare preying upon themvand there eggs hope this helps