A scientist is trying to measure the rate at which certain organisms undergo binary fission. The scientist takes a colony of bacteria from the soil and a colony of bacteria from a pond. He puts both in weak aqueous solutions and measures the rate at which they increase. The bacteria from the pond multiply much faster in the condition, and the scientist declares them the species that undergo binary fission more often. Why is this a bad test of reproductive rate? Your

The soil bacteria are at a disadvantage because they have not evolved for weak aqueous solutions.

One colony of bacteria got oxygen the other did not.

With so many bacteria in a colony, it is impossible to count them.