Nobel Prize winner Alexander Fleming ------- research on the bacteria Staphylococcus aureus when he noticed some mold growing in the bacteria’s petri dish. The bacteria around the mold had been destroyed, leading to a new discovery: the mold in the petri dish, later identified as Penicillium rubens, has strong antibacterial properties.Which choice completes the text so that it conforms to the conventions of Standard English? conducts eliminatehas conductedeliminatewas conductingeliminatewill conduct

Read the passage.Discovering PenicillinIn 1928, bacteriologist Alexander Fleming was studying Staphylococcus, a type of bacteria that can cause serious infections. He grew the bacteria in small containers called petri dishes. One day he noticed that mold had accidentally been introduced into one of the petri dishes and was startled to see that there were no bacteria around the moldy area. Fleming correctly deduced that the mold had had an antibacterial effect; somehow it had prevented the bacteria from growing. Fleming identified the mold as the strain Penicillium notatum and called its antibacterial ingredient—which he was unable to successfully extract—penicillin. Fleming's discovery of penicillin's unique effect led to the eventual finding that it could be used to treat infections. Several years after his initial observation, scientists built on his work by extracting penicillin from mold and demonstrating its effectiveness as a treatment.What is the main, or central, idea of the passage?Fleming noticed that when a strain of mold inadvertently came into contact with a petri dish, the mold prevented bacterial growth.Fleming's chance observation of the antibacterial properties of mold led to the discovery of penicillin as a treatment.Fleming came up with the name for penicillin, the bacteria-fighting ingredient in the Penicillium notatum mold.Save answer

The main, or central, idea of the passage is Fleming's chance observation of the antibacterial properties of mold led to the discovery of penicillin as a treatment. How does the detail in bold develop the main idea?In 1928, bacteriologist Alexander Fleming was studying Staphylococcus, a type of bacteria that can cause serious infections. He grew the bacteria in small containers called petri dishes. One day he noticed that mold had accidentally been introduced into one of the petri dishes and was startled to see that there were no bacteria around the moldy area. Fleming correctly deduced that the mold had had an antibacterial effect; somehow it had prevented the bacteria from growing. Fleming identified the mold as the strain Penicillium notatum and called its antibacterial ingredient—which he was unable to successfully extract—penicillin. Fleming's discovery of penicillin's unique effect led to the eventual finding that it could be used to treat infections. Several years after his initial observation, scientists built on his work by extracting penicillin from mold and demonstrating its effectiveness as a treatment.It describes Fleming's everyday duties as a researcher.It indicates the unintentional nature of Fleming's discovery.It criticizes Fleming's procedures as unsanitary.Save answer

In its gaseous form, oxygen is invisible to the human eye, but once cooled to -183 degrees Celsius, oxygen becomes a pale blue liquid. That liquid, which is extremely cold and highly reactive, can then be used for many industrial and scientific ------- propelling rockets, welding metal, and bleaching paper. Which choice completes the text so that it conforms to the conventions of Standard English? purposes, includingeliminatepurposes, these include:eliminatepurposes, and includeeliminatepurposes, including the following,

Which of the following statements is true concerning Alexander Fleming and his antimicrobial discovery? View Available Hint(s)for Part A Immediately following its discovery, the first antibiotic was mass produced and made readily available to the public. The first antibiotic was discovered by accident when a contaminating mold killed a culture of Staphylococcus aureus. Alexander Fleming discovered the first antibiotic, bacitracin, made by the bacterium Bacillus. Alexander Fleming sought an antimicrobial compound that could be used as an alternative to amputation in patients who suffered from gas gangrene caused by Clostridium perfringens.

British scientists James Watson and Francis Crickwon the Nobel Prize in part for their 1953 paperannouncing the double helix structure of DNA, but itis misleading to say that Watson and Crickdiscovered the double helix. _______ findings werebased on a famous X-ray image of DNA fibers,“Photo 51,” developed by X-ray crystallographerRosalind Franklin and her graduate studentRaymond Gosling.Which choice completes the text so that it conformsto the conventions of Standard English?A) They’reB) It’sC) TheirD) Its