A mutation occurs in a gene causing a pea plant produce 75% fewer leaves. this would be considered what kind of mutation? a. positive
b. negative
c. neutral .

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car