A hand sanitizer was advertised to be more effective at killing bacteria than any antibacterial soap. Students were split evenly into 4 groups to test this claim. Groups 1-3 washed their hands using the assigned hand sanitizer or soap (see table) and warm water for two minutes, and then dried their hands with a paper towel. Group 4 rubbed their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then dried their hands with a paper towel. After washing, each student’s hands were swabbed and the swab was applied to a culture plate and incubated. Finally, the bacterial cultures were counted. what is the independent variable?

Answers

Answer 1

Answer:

Group 4

Explanation:

The control group in this case would be those students in group 4.

The control group during an experiment is a group that does not receive the treatment administered to other groups and as such used as a standard for measuring the effects of the treatment on other groups. Whatever differences that exist between the control group and the various treatment groups is attributed to be as a result of the treatment administered to the groups.

In this case, group 4 only used warm water for washing their hands instead of the hand sanitizer/soap used by the other groups. Whatever differences found out in the bacterial count in their respective culture swabs can be attributed to the effects of the hand sanitizer/soap.


Related Questions

what part of your home would be like the mitochondria of the cell?

Answers

Answer: the fuse box

Explanation: it powers all the electricity in the house

Answer:

The cell wall because it protects you.

Explanation:

Which of the following is not characteristic of a behavior?
a.
It can be observed.
b.
It can be recorded.
c.
It can be influenced by the environment.
d.
It can include a person’s thoughts.

Answers

Answer:

D.

Explanation:

Characteristcs do not include a persons thoughts.

Answer:

Its 100% D

Explanation:

got it on edg

Which pair of nitrogenous bases will form a bond in a DNA molecule?

Answers

Answer:

Adenine and Thymine

Explanation:

Answer:

Adenine Thymine

Explanation:

The most damaging effect of Hurricane Sandy was the fires. Question 4 options:

True

False

Answers

Answer:

false

Explanation:

the most damaging effect of hurricane sandy was the flooding

If the endoplasmic reticulum were removed from the cell,which organelle would not be able to function properly, and why

Answers

Answer:

Golgi apparatus

Explanation:

Because it packages proteins received from the endoplasmic reticulum.

5 points
Photosynthesis and cellular respiration are sometimes called "opposite
reactions." A. Complete the chart by listing the reactants and products of
photosynthesis and cellular respiration. B. Write a one-sentence summary
explaining why photosynthesis and cellular respiration are often
considered opposite reactions. *
PHOTOSYNTHESIS
RESPIRATION
2 CD
GLYCOLYSIS
LIGHT DEPENDENT
REACTIONS
2 PYRUVATE 2
ATMOSPHERE
0.
CO.
KREB'S
x 2
CYCLE
CALVIN
CYCLE
386)
x2
1 GLICOSE
ELECTRON
TRANSPORT CHAIN

Answers

I can answer the first part for you :D

Photosynthesis: CO2 + H2O + Sunlight = O2 + H2O + Glucose

Cellular respiration: O2 + H2O + Glucose = CO2 + H2O + ATP

Which of the following best describes all macromolecules?
A. They are organic molecules that all contain carbon.
O
B. They are organic molecules that all contain nitrogen.
O
C. They are inorganic molecules that all contain nitrogen.
6
D. They are inorganic molecules that all contain carbon.

Answers

Answer:

A. They are organic molecules that all contain carbon.

Explanation:

All known life on earth is carbon-based. Most molecules used as building blocks are organic i.e. consisting of based on carbon. This means that they consist of atoms of carbon, hydrogen, oxygen with other variations like nitrogen.

Some macromolecules include glucose-based polysaccharides, amino-acid based proteins and lipids consisting of glycerol and fatty acids.

. Polymers are made of individual subunits called ?

Answers

Answer:

monomers

Explanation:

i hope this helps

Answer:

Try Monomers?

Explanation:

I had biology last year lol. I remember something about this haha.

true or false farming refers to the cultivation of crop​

Answers

true because the devotion of farming is growing crops or in other words cultivation so it’s true

true because the devotion of farming is growing crops or in other words cultivation so it’s true

A lot of your personality comes from ______________________ rather than your DNA.

Answers

Answer:

Inheritance

Explanation:

Many believe that personality traits can come from how you are treated when you are a child while that can play a part in a personality trait that's not the full truth. Personality traits are inherited from your parents so if your father is stubborn but not your mother there's a 50% chance that the child may be stubborn like his or her father.

Hope this helps.

HELP PLEASEEE ITS DUE IN 5 MINUTES

Answers

The answer is the second one. Good luck!!

DNA is to T as RNA is to ?

Answers

Answer:

U (Uracil)

Explanation:

DNA is to Thymine

RNA is to Uracil

Describe adaptations in the circulatory and neurosensory systems of cephalopods that are particularly valuable for actively swimming, predaceous animals.

Answers

Answer:

yo no se mijo habla espanol

construct a written argument to support a claim about the relative
advantages and disadvantages of sexual (meiosis) and asexual reproduction (mitosis
and binary fission)

Answers

Answer:

Asexual reproduction has an increased chance of genetic diseases and low genetic diversity, but only requires one parent. Sexual reproduction requires a male and female, but leads to higher genetic variation and less genetic diseases.

Artificial selection has given us * A. The many species of wild cats B. Breeds of domesticated dogs C. Various human societies D. The many rainforest species

Answers

Answer:

b. breeds 0f domesticated dogs

Explanation:

I think its b.

Answer:

c. Breeds of domesticated dogs

Anatomy: I need help!! If you know the answer pls let me know!! It would be greatly appreciated

Answers

Answer:i'm pretty sure its C: into cells

Explanation:

2. How are the kelp and the chemosynthetic bacteria of the
hydrothermal vents similar?
A. Both use energy from the sun to make food.
B. Both are primary producers.
C. Both are scavengers.
D. Both use hydrogen sulfide as an energy source.

Answers

Answer:

C. Both are primary producers.(THIS IS THE CORRECT ANSWER)

Explanation:

Chemosynthesis is a biological conversion of carbon molecules. These are found around the hydrothermal vents.

It is due to the bacteria feeds on the hydrogen sulfide that is coming out from the vents that are required as an energy tonic for the bacteria to survive and kelp also has similar requirements. Kelps forests are shelters for these bacteria and hence both are found near the source of energy.  

Hence the option B both are primary producers.

brainly.com/question/19578387.

Which behaviors are stimulated without using the forebrain?

deep thinking

reflexes

ganglia

integration

Answers

Answer:

reflexes

Explanation:

Answer:

the answer is B reflexes

Explanation

I took the test and got 100 so it is right

10. Which respiratory condition below correctly describes what happens during pneumonia? A. The alveoli become damaged and enlarged . O B. The airways become swollen and inflamed . C. The alveoli in the lungs fill with fluid. D. The airways restrict in response to an invader.

Answers

Answer:

the alveoli in the lungs fill with fluid

Which of the following is found in animal cells, but not plant cells?
lysosome
vacuole
mitochondria
endoplasmic reticulum

Answers

Lysosome is found in animal but not plant

The end result of meiosis is:
O Four diploid cells that are genetically different
O Four haploid cells that are genetically different
O Two diploid cells that are genetically identical
O Two haploid cells that are genetically different

Answers

Answer:

Explanation:

d two haploid cells that are genetically diffrent

how does the temperature change with altitude in the troposphere?

Answers

Answer:

The troposphere is heated from the ground, so temperature decreases with altitude. Because warm air rises and cool air sinks, the troposphere is unstable. In the stratosphere, temperature increases with altitude.

Explanation:

NEED HELP!!!!!! QUICK PLEASE!

Answers

Answer:

Last one

Explanation:

I took this test

Answer:

its D, it can make earths climates warmer.

i’m very confused on this question so i rlly need help asap

Answers

Answer:

A tall, green plant with dominant alleles for both characteristics  have a genotype TTGG and its phenotype is tall and green.

Explanation:

For a given trait, the dominant allele of the allelic pair is represented in capital letters (T and G), while the recessive allele is represented in small letters (t and g).

In the case of this plant, whose phenotype is tall and green —both dominant characteristics— and considered pure because both alleles are dominant, the genotype is TTGG.

In the case of a hybrid, the phenotype would be the same but the genotype would be TtGg. A recessive phenotype would be ttgg.

Food is moved through the esophagus into the stomach by
involuntary muscle contractions called?

Answers

Answer:

peristalsis

Explanation:

when food contracts down the esophagus

Answer:

peristalsis

Explanation:

What type of wave passes through the spring of a frog toy

Answers

Answer:

A sound wave, I'd assume.

Explanation:

Describe the process of photosynthesis,include what is needed and what is produced.Provide an explanation as to why photosynthesis is needed for plants to maintain homeostasis.

Answers

Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants. After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.

Answer:

The process by which plants are prepared their own food by taking carbon dioxide from air and water from roots in the presence of sunlight and chlorophyll is called photosynthesis.they produced oxygen

6Co2 + 6H2o =C6H12O6 + 6O2

Explanation:

photosynthesis is ascential for their growth & development

What are some characteristics that protists and fungi both have that make them eukaryotes?

Answers

Answer:

They have a nucleus and other membrane bound organelles.

Explanation:

hoped this helped :)

The characteristics that protists and fungi both have that make them eukaryotes is the possession of a membrane bound nucleus and other organelles.

EUKARYOTES:

Eukaryotic cells are cells that possess a membrane-bound nucleus to house their genetic material (DNA). Eukaryotes also possess other membrane bound organelles like mitochondria, golgi apparatus etc.

This feature particularly differentiates them from prokaryotic cells. Eukaryotic organisms include plants, animals, fungi, some protists etc.

Therefore, it can be said that the possession of a membrane bound nucleus and other organelles is the characteristics that makes fungi and protists be considered eukaryotes.

Learn more: https://brainly.com/question/21196976?referrer=searchResults

what is meant by locomotor skill​

Answers

Answer:

Body moving from one place to another in a vertical plane. Develop bodily control. Walking, running, leaping, jumping, hopping, galloping, sliding, & skipping.

Explanation:

locomotor skills are skills that help your body move from one place to another. for example walking is a locomotor skill or jumping,skipping, running, etc

Why are flowers brightly colored?

Answers

Answer:

Photosimphasis And the sun

Explanation:

Answer: Flowers are brightly colored because they are meant to attract birds, bees and other insects in order to help the plants reproduce.

Explanation:

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