You are given the task of quantifying the number of bacteria in your soil sample. You combine 1 g of soil with 9 ml of PBS and made subsequent 1/10 dilutions by combining 100 ul of a dilution with 900 ul PBS. Say that when you plate 100 ul of a 10-5 dilution, you count 97 bacterial colonies. How many bacteria do you estimate were present in your initial 1 g soil sample? Be sure to include units in your answer. Briefly describe how you arrived at your answer.

What is one benefit of a nonrenewable resource, such as natural gas? a. generate large amounts of electricity b. less expensive overtime c. produces pollution d. will run out eventually

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.