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inysia [295]
3 years ago
13

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. What is the control in the experiment?
a. Disk soaked in disinfectant 1
b. Disk soaked in disinfectant 3
c. Disk soaked in disinfectant 2
d. Disk soaked in distilled water
Biology
1 answer:
beks73 [17]3 years ago
8 0
<span>d. Disk soaked in distilled water

Experimentation is a scientific process wherein you test and verify a hypothesis based on its assumption is going to be supported or negated (null hypothesis). Hence experimentation involves the independent and dependent variable, also control variable as a level in the IV. </span>
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Answer;

Mendel's work was not well known until many years after Darwin published his theory of evolution

Explanation;

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-Gregor Mendel had the answer to Darwin's problem. Traits were not blended, but inherited whole. And according to Mendel's laws of inheritance, a trait that might disappear in one generation might reappear in the following generation. Modern Neo-Darwinism combines both Darwin's and Mendel's work.

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3 years ago
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the argument that the researcher supports in this statement is that the Viruses are nonliving

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The virus tries its entry through the wounds, respiratory tracts and by passing through insects.

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Hope it helped!!!

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