In a dihybrid cross, a purely heterozygous individual crossed with another purely heterozygous individual yields a phenotypic ratio of... 1:0
1:2:1
3:1
9:3:3:1

A: rachel carson :

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.