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Lera25 [3.4K]
3 years ago
10

Which event would most likely cause a change in

Biology
1 answer:
Allisa [31]3 years ago
8 0
3 - Exposure to radiation

Radiation ionises cells and can cause mutations in genes.
The rest of the options have no affect on genetics at all, merely a temporary affect on the physical aspects of the body, such as heart rate etc.
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How has the discovery of Gram Staining<br><br> revolutionized how microbes are treated
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Answer:

See the answer below

Explanation:

<em>The discovery of Gram staining has revolutionized how microbes, especially bacteria, are classified. Bacteria that are positive for Gram staining are classified as Gram-positive while those that are negative to the procedure are termed Gram-negative.</em>

What constitutes positivity or negativity to the Gram staining procedure is the ability of the cell walls of bacteria to either retain a dye or allow it to be washed off during the procedure. The components of the cell wall differentiate Gram-positive bacteria from the Gram-negative ones and confer the ability to retain dye on the former. Gram-positive bacteria have thick peptidoglycan cell walls and lower lipid contents as compared to the Gram-negative bacteria and with this, they are able to retain the color of the stain used during the Gram staining procedure.

During the Gram staining, a scoop of the bacterial isolate is usually smeared and heat-fixed to a glass slide. Thereafter, crystal violet drops are added to the slide, poured off, and then rinsed with water. A few drops of iodine are then added and allowed to stay for a few seconds before being poured off and rinsed. A decolorizer (an alcohol) is then added to the slide, allowed to stay for a few seconds before it is washed off. The addition of a counterstain follows and the slide is allowed to stay for another few seconds before the stain is washed off. The slide is then rid of water and then viewed under the microscope. <u>A Gram-positive bacterium will able to retain the color of the dye which is purple</u> while a <u>negative bacterium will lose the color of the dye and appear red under the microscope</u>.

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3 years ago
What is the Toni city of the beaker to the left?
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Which of the following describes how the winter season affects organisms in the tundra biome?
lianna [129]
D. if the organism is not adapted to the tundra, it will migrate or else it would die of the extremely cold weather at about -30 degrees fahrenheit.
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What is the difference between nutation and barycenter?
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Generally speaking, precession is believed to <u>occur as a result of the gravitational forces exerted by the sun and moon as they revolve around the earth.</u> When an object revolves, its axis of rotation exhibits a nodding or swish motion. There is a wobble in the movement of precession. This phenomenon is caused by the gravitational pull exerted by one body upon another, resulting in nutation.

Hope this helps :)

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2 years ago
Which two elements, in looking at their atoms, have a total of 51 protons between them?
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Answer:

Atomic Mass 121.76 atomic mass units

Number of Protons 51

Number of Neutrons 71

Number of Electrons 51

9 more rows

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3 years ago
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