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3 years ago

The work of Alexander Fleming shows that ____.

Biology

2 answers:

Gennadij [26K]3 years ago

8 0

Answer: C) Not all scientific knowledge begins with an experiment

Explanation:

Fleming's lab was very messy, and one day when he is back from his vacations, he noticed that a colony of a fungus had grown as a contaminant on one of the Petri dishes sown with a bacteria called Staphylococcus aureus. Fleming observed a bacterial lysis, which means the death of the bacteria.

The dishes got contaminated by Penicillium, which is a mold that produces a an antibacterial substance, called penicillin. This is an antibiotic that attacks a wide range of bacteria.

At first, his findings were underestimated and he was not able to isolate this penicillin. But in 1940, Howard Florey and Ernst Chain found out that this antibiotic could be used as a therapeutic agent to fight bacteria.

So, in this case the discovery of penicillin was accidental, without planning a specific experiment.

Roman55 [17]3 years ago

5 0

Answer:

Explanation:

My science test told me so.

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Explanation:

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1 year ago

Sort the following words or phrases as descriptions or examples of fibrous proteins, globular proteins, or both. Exhibit primary

Debora [2.8K]

Answer:

Polymers of amino acids can be both fibrous as well as globular protein. Hemoglobin is a globular but the collagen is the fibrous protein both being the amino acids.

Explanation:

Soluble in water: globular protein is soluble in water.

intermediate filaments: fibrous protein

Insoluble in water: fibrous protein is insoluble in water.

function as structural proteins in the cell: fibrous protein.

some function as enzymes: globular protein.

structure is somewhat spherical; globular protein.

structure is rod-like: fibrous protein

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3 years ago

Describe how one of the occupations that you studied would use descriptive statistics when performing their job

riadik2000 [5.3K]

Answer:

Given the nature of descriptive statistics, psychologists will use descriptive statistics to assemble data about their clients through their observations of clients' behavioral patterns. Then a sample of the data will be taken. The sample is summarized statistically, interpreted, and recorded. Psychological reports can be issued based on the observed statistical results.

Explanation:

Psychologists and other occupations use descriptive statistics to describe the basic features of the data in their studies or experiments. Descriptive statistics provide simple generalizable summaries about the observed sample and the calculated measures. Using simple graphics, they form the basis of quantitative data analysis.

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3 years ago

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3 years ago

Which of these factors makes nuclear energy unsustainable?

Strike441 [17]

Answer:Nuclear energy generates too much toxic waste.

Explanation:

got it right on the quiz

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3 years ago