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dangina [55]
3 years ago
10

A student from one of the research labs is having trouble preparing a slide for examination and photographing. The bacterial sli

de that he has brought to you was prepared using a commercially purchased stain. He has asked for your help in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. After examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. Which of the following statements does NOT explain the fact that there are no bacteria present on the student’s slide?
Biology
1 answer:
ankoles [38]3 years ago
6 0

Answer: Rinsing with alcohol during the washing step stripped the bacteria off the glass slide.

Explanation:

The step that is being wrong in the whole experiment is that the student is washing the bacteria on the slide with alcohol.

Alcohol might have washed off all the bacteria as it is corrosive in nature. The bacteria that is going to be observed in the experiment is being killed when it is washed off.

This was the wrong step opted by the student if he finds any alternative solution to this then the bacteria can be observed in the microscope.

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Calculate the population. There is a flock
laiz [17]

Answer:

C. Population shrinks; 15 birds in  the end

Explanation:

Let us understand some of the given terms;

  immigration is a form of migration in which organisms comes into a territory.

  emigration is a form of migration in which organisms leaves a place

 population is a group of organisms of the same species

Given:

Population  = 21 birds

Immigrant = 3 birds

Emigrants  = 9 birds

 Population change = total number of birds + immigrant  - emigrants

                                   = 21 + 3 - 9

                                     = 15 birds

The population will shrink giving 15 birds in the end

5 0
3 years ago
a star the designation HD 12929 in the constellation Aries is approximately 60 light years from Earth's sun.this star could also
Tems11 [23]

Answer:

The star could also be said to be 360 Million Million miles from the earth's sun.

Explanation:

A light year equals 9.4607 × 10^{12} km.

This is also approximately 6 Million Million Miles.

If we expressed the answer in miles, then we have to multiply 6 by 60.

This is equals to 360.

Therefore, 60 Light years is approximately 360 Million Million miles.

Cheers!

6 0
2 years ago
What is the process of water moving down through the soil called?
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Answer:

The answer is B the girl is wright

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