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Kipish [7]
3 years ago
10

Students in Ms. Winters' class were interested in testing the antibacterial strength of hand soap versus hand sanitizer. The stu

dents planned to wash their hands using the sanitizer or soap and warm water for two minutes, then dry their hands with a paper towel. The standard of comparison would be rubbing their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands would be swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures would be counted. What would be an appropriate research question to guide this scientific investigation
Biology
1 answer:
Alina [70]3 years ago
8 0

Answer: Is hand sanitizer more effective in killing bacteria than hand soap?

Explanation:

The most appropriate question will be questioning the effectiveness of the hand sanitizes versus soap.

The students compared the effectiveness of both the chemicals. The children must use soap and then their hand must be used as an area to get sample for microbes.

Then another group of children will use soap for washing the hand and then use hand as an area to take sample for the microbes.

The plate will show the number of colonies which will decide the effectiveness of the soap or sanitizer.

You might be interested in
A woman with normal blood clotting ability whose father was a hemophiliac and whose mother was normal with no family history of
Alborosie

Answer:

The answer is 25%.

Explanation:

Hemophilia is a recessive illness that is x-linked.

If the husband has normal clotting ability, that means he has the dominant gene since he has only one X chromosome.

Since there is a probability that their child will have hemophilia, this means that the woman, who has 2 X chromosomes but has normal blood clotting abilities, has one dominant and one recessive hemophilia gene.

The probability that their first child will be a male is 50% and the probability that he will have hemophilia is also 50% since he will only get the Y chromosome from the father and the mother has one dominant and one recessive.

So the probability that their first child will be a son with hemophilia is 25%.

I hope this answer helps.

5 0
3 years ago
Which of the following is true of receptors for dynamic equilibrium?
gulaghasi [49]

Answer:

The correct answer is option D.

Explanation:

Dynamic equilibrium refers to the sense, which interprets angular acceleration in the three-axis of rotation that when combined provides a sense of equilibrium when movement takes place. The receptors for dynamic equilibrium are known as ampulla, maculae are the receptors of static equilibrium.  

The movement of the head does stimulate dynamic equilibrium receptors, as these receptors are situated in the inner ear that moves with the head. The receptors for dynamic equilibrium are situated in the semicircular canals. The receptors for dynamic equilibrium react to rotational forces, as the receptors are located on the three-axis, thus, they can detect rotation, that is, angular momentum.  

7 0
4 years ago
When two heterozygous individual are crossed,the proportion of the offspring that are true breeding for dominant trait is
Angelina_Jolie [31]

Answer:

75%

Explanation:

If you drew a Punnett Square, you will see that the possible outcomes would be AA, Aa, aA, and aa. Three out of the four would exhibit the dominant trait.

8 0
3 years ago
Which of these describes a quantitative observation?
r-ruslan [8.4K]

D. is the answer

Malory

3 0
3 years ago
Pls help i dont understand :( will give Brainliest + 25 points!!
IgorLugansk [536]
It’s just a black picture for me what is it
7 0
3 years ago
Read 2 more answers
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