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trapecia [35]
3 years ago
13

Penicillin is Choose one: A. produced by a mold and was discovered accidentally. B. a human-designed antibiotic, synthesized to

specifically target human pathogens. C. synthesized by Staphylococcus bacteria. D. naturally produced by human cells when they are infected with a bacterial pathogen.
Biology
1 answer:
NeX [460]3 years ago
4 0

Answer:

Option-A

Explanation:

Penicillin is an antibiotic drug that is derived from the fungal species of Penicillium molds especially the<em> Penicillium notatum</em>.  The penicillin acts by disrupting the formation of the cell wall and thus prevents the growth of the bacteria.

The discovery of penicillin was accidental when he was studying the petridish of staphylococcus and he found that due to avoidance while the experiment, molds grew in the petridish.  The area around the mold was clear and clear rings without the bacteria were easily observed. This lead to the discovery of the penicillin compound.

Thus, Option-A is the correct answer.

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List the different steps of the rock cycle
diamong [38]

Answer:

Weathering and erosion, transportation, deposition, compaction and cementation, metamorphism, and rock melting.

Explanation:

The rock cycle has 5 main sections (igneous, sedimentary, sediment, metamorphic, and magma.) The rock cycle can go almost any way it wants. Its not like the water cycle were it goes in certain order.

6 0
3 years ago
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Plzz help with my test
Levart [38]
The chemical equations for the processes are opposite of each other
5 0
2 years ago
what would be the most likely effect on cellular respiration if a plant were to lose much of its cjhlorophylkl
goldenfox [79]

Cellular respiration would produce less energy when plant were to lose much of its chlorophyll.

Plants can actually live longer without photosynthesis than they can without respiration. Some plants survive half the year without performing photosynthesis, but if they stop performing cellular respiration, even for a minute, they would be dead where they stand.

During photosynthesis, plants absorb sunlight and carbon dioxide from the air. Through a series of steps, much like cellular respiration, they convert these reactants into the products oxygen and glucose. The plants then can use the oxygen and glucose to make ATP in cellular respiration. The rate of respiration is greater than the rate of photosynthesis. So this means there is an overall excess of carbon dioxide is produced during respiration.

To learn more about Cellular respiration , here

brainly.com/question/13721588

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8 0
10 months ago
I need help on this answer
tatiyna

Answer:

The correct answers are A and D

Explanation:

8 0
3 years ago
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This area on earth extends from 66.5o degrees North and south of the equator to the poles. It is an area on earth where temperat
Nataliya [291]

Polar ice cap

Explanation:

The polar ice cap is an area on the earth that extends from 66.5° north and south of the equator to the poles.

The polar ice cap is an area of very low temperature and the surface is mostly covered by ice.

  • The vast polar ice caps the earth's northern and southern limits.
  • This is the region of the Arctic and Antarctic circle.
  • This region receives diffused solar radiation from the sun.
  • This is why they rarely warm up.
  • The region of the equator has no ice because they receive direct sunlight.
  • The soil here is frozen.

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Tundra brainly.com/question/2334099

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5 0
3 years ago
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