Mathematics is useful in some areas of biology. When one looks carefully at a biological problem, one can usually discover more than one causal explanation. You have to be a good mathematician to study biology. Evidence for natural selection would not necessarily falsify the inheritance of acquired characters. There are many ways of solving a problem in mathematics.
Biology is a science and, as such, there can only be one true explanation for any problem.
Many areas of biology can be understood without mathematics. Biology needs more mathematicians. There is only one correct way of solving any mathematics problem. Biology is always changing and growing. Mathematics deals with universal laws, biology deals with unique events.