The gene resulting in the phenotype of flat fingernails is recessive. Rounded fingernails are dominant. Two parents have the genotype Ff and Ff. What are the chances their child will have flat fingernails?

  like australopithecus afarensis; probably the direct ancestor of this group. africa: 5.8 to 4.4 million years ago. 

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. 

The honest answer i can give u is glucose