A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and distilled water. While the four disks were soaking in their respective solutions, she streaked a sterile nutrient agar dish with a culture of E. coli bacteria. Then, she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days. The diagram shows how the nutrient agar dish looked on Day 1 and Day 4. The shaded portion of the plate on day 4 indicates the bacterial growth. Look at the dishes in the diagram. Which disinfectant was the most effective at controlling the growth of E. coli? A. Disinfectant 2 B. Disinfectant 1 C. Distilled water D. Disinfectant 3

Question

09-11-2017
Biology

contestada

A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and distilled water. While the four disks were soaking in their respective solutions, she streaked a sterile nutrient agar dish with a culture of E. coli bacteria. Then, she placed each disk carefully onto the nutrient agar dish, placed the lid on the dish, taped it shut, and incubated the dish at 37°C for several days. The diagram shows how the nutrient agar dish looked on Day 1 and Day 4. The shaded portion of the plate on day 4 indicates the bacterial growth. Look at the dishes in the diagram. Which disinfectant was the most effective at controlling the growth of E. coli? A. Disinfectant 2 B. Disinfectant 1 C. Distilled water D. Disinfectant 3

Respuesta :

Otras preguntas

how do u find the measures of unknown angles ignore how much I missed (-25) on this question

Given below is the odd-number function. Which of the following are equal to O(20)? Check all that apply. O(n) = 2n - 1 A. O(19) + 1 B. The twentieth odd number

Group 17 is called the halogen family, and the group to its right is called the noble gases. How are these elements alike and how are they different?

While practicing for interviews? __________. a. practice speaking in? monotone, while making? eye-contact b. use filler words c. evaluate the quality of your

Jason has decided to start his own business, but he is not quite sure what type of business he wants to own. he knows that the best two categories for small bus

In triangle ABC, measure of angle a is 50, angle b is 60, and angle c is 70. ABC can be classified as what triangles. (There are two)

A 38-year-old male is upset about his low sperm count and visits a "practitioner" who commonly advertises his miracle cures of sterility. The practitioner is a

Stephen wants to work this summer in order to make his car payments, but he also must attend daytime summer classes if he wants to graduate. what is stephen's b

Carly is a catcher on the school softball team. By the end of the season, she had played 45% of the 49 games the team played. In how many games did Carly not pl

Nadia's father bought a new camera,lens, and case. He rounded the cost of all the items to estimate how much he would need. He rounded the cost of the camera to

davidsilva2019 davidsilva2019 · Answer 1 · 2017-11-10T10:51:08+01:00

I found the exercise on the internet. Attached is the diagram of the observed results.
Correct answer: "B. Disinfectant 1"
As shown in the diagram, the whole dish was plenty of E. coli. The only areas that did not have bacterial growth were those around the disks soaked in disinfectant 1 and disinfectant 3. However, the diameter of the area around the disk soaked in disinfectant 1 was the largest, meaning that this disinfectant had the most effective power at controlling the growth of E. coli.