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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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Energy pyramid: An energy is a graphical model of energy flow of energy community
Andru [333]

1) Each level losses<u> 90% </u>of energy that was contained in the previous level. 2)Protozoa (Producer), snail, shrimp, amphipods (Primary consumers), Salamander (Secondary consumer), Intestinal roundworm (Tertiary consumer), fungi (Decomposer).

<h3>What is the 10% rule in trophic webs?</h3>

The 10% rule states that at each trophic level occurs an energy transference from one of the levels to the next, with only 10% being usable in each of them.

As a general rule, only about 10% of the energy stored as biomass at one trophic level -per unit time- ends up as biomass at the next trophic level -in the same unit of time.

The remaining 90% of energy is lost to the environment as heat.

The progressive reduction of energy determines the number of trophic levels (4 or 5).  

In the xposed example,

1) Each level losses<u> 90% </u>of energy that was contained in the previous level.

2)

  • 1st level: Protozoa ⇒ Producer
  • 2nd level: snail, shrimp, amphipods ⇒ Primary consumer
  • 3rd level: Salamander ⇒ Secondary consumer
  • 4th level: Intestinal roundworm ⇒ Tertiary consumer
  • 5th level: fungi ⇒ Decomposer

You can learn more about the 10% rule at

brainly.com/question/18254335

#SPJ1

8 0
1 year ago
Of the inner planets, the planet with the highest percentage of atmospheric oxygen is A) Earth B) Mars C) Mercury D) Venus
serious [3.7K]

Answer:

A) Earth

or C) Mercury

sorry i wasn't that much help but i narrowed it down.

5 0
3 years ago
Read 2 more answers
Are chloroplasts found in most plant cells explain
Ede4ka [16]

Answer:

Yes.

Explanation:

Yes, they are necessary for photosynthesis.

4 0
3 years ago
15. If a person feels pressure on her bladder, then she is experiencing -
Nutka1998 [239]
D to release external waste.
6 0
3 years ago
Read 2 more answers
Why don't we worry about water vapor?
Sergio [31]

Answer:

Explanation:

Water vapor is the most important greenhouse gas. ... However, water vapor does not control the Earth's temperature, but is instead controlled by the temperature. This is because the temperature of the surrounding atmosphere limits the maximum amount of water vapor the atmosphere can contain.

7 0
3 years ago
Read 2 more answers
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