If you need a mass of DNA between 50 and 100 ng in order to have a successful electrophoresis, you should use between and μL of your calf DNA preparation.

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The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.