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Sati [7]
3 years ago
15

Staphylococcus aureus is grown in heart-infusion broth at 37°C. If you start exponential phase with 100 cells, and after 90 minu

tes you have 800 cells, what is the generation time for S. aureus?
Biology
1 answer:
Nikolay [14]3 years ago
8 0

Answer:

30 minutes

Explanation:

Bacteria reproduce by binary fission, a process by which one parent cell divides to form 2 progeny cells. Because one cell produces 2 progeny cells, bacteria are said to undergo exponential ( logarithmic) growth.

As in the case of staphylococcus aureus, we start with 100 cells ,  and after 90 minutes number becomes 800 that means  , firstly the cells doubled (100 x 2 = 200 ) after 30 minutes. Again after 30 minutes they doubled ( 200 x 2 =400 ) and again after 30 minutes they doubled (400 x 2 = 800). So in 90 minutes 100 cells became 800 cells.

Hence the generation time for S.aureus is 30 minutes.

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This theory is excepted by scientist when
Arada [10]

Answer:

Explanation:

If enough evidence accumulates to support a hypothesis, it moves to the next step — known as a theory — in the scientific method and becomes accepted as a valid explanation of a phenomenon. Tanner further explained that a scientific theory is the framework for observations and facts.

3 0
3 years ago
Pietro has two dogs that are related, and he wants to understand why one of the dogs has tan fur and the other has brown fur.
kompoz [17]

Polygenic inheritance is simply a form of inheritance whereby the trait of the individual or the animal is gotten from the cumulative effects of several genes. In such case, there are many genes which control the expression of the trait. This is quite different from the monogenic inheritance whereby the trait is as a result of the expression of just only one gene.

Since Pietro has two dogs that are related, and one of the dogs has tan fur and the other has brown fur, then this means there's more than one gene which is expressed in this case.

In conclusion, the answer to the question is polygenic inheritance.

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brainly.com/question/22923

6 0
3 years ago
What single feature is primarily responsible for the variation of climate in different parts of the world?
astraxan [27]

angle of incoming sunlight

Explanation:

The single feature that primarily determines the variation in climate in different parts of the world is the angle of incoming sunlight.

  • Climate is simply an extended study of weather over a long period of time.
  • The elements of weather like temperature, pressure, rainfall all conditions climate.
  • The angle of incoming sunlight is by far the most important factor that determines climatic patterns on the earth.
  • Around the equator, the sun is overhead and these regions are usually hot driving a wide range of weather phenomenon.
  • The polar and temperate regions receive diffused sunlight because the sun is at an angle there.

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7 0
3 years ago
Under what environmental conditions would a zygote not undergo meiosis
sashaice [31]

A zygote will not undergo meiosis in an environmental state that is not favorable for the zygote’s survival i.e. the chance of the zygote to survive is not certain. Take for example, chlamydomonas will form a zygote under normal asexual mitotic reproduction in a favorable environmental condition. However, under unfavorable environmental conditions the organism also reproduce sexually to form a zygote but will never proceed to meiotic division because of the unfavorable environmental state.

8 0
3 years ago
Explain the systems and structures and how they are used by the plant to maintain homeostasis.
bazaltina [42]

Answer:

The given image shows - the Stomata that helps in maintaining homeostasis in the plants.

Explanation:

Stomata are the small structure resemble as tiny or pinholes that found on the underside of the leaves and play many roles in the plant. Stomata help in the gas exchange and also helps in transpiration.  It allows oxygen a gas and water in vapor form from the leaves to the outer environment and let carbon dioxide inside the cell.

This system also helps in transpiration by closing and opening stomata with the help of their guard cell by becoming turgid and flaccid by osmotic pressure.

8 0
3 years ago
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