A scientist claims that he has protected animal test subjects from a newly mutated virus using an experimental vaccine.The experimental vaccine was injected into five animal test subjects. The scientist also injected a placebo vaccine into five other animal test subjects.One month later, all of the test subjects were exposed to the mutated virus. The subjects that received the vaccination showed no sign of the disease and blood tests confirmed the presence of antibodies against the disease, but the subjects given the placebo developed symptoms of this condition.Why did one group have a placebo injected before being exposed to the virus?A) They were part of the experimental groupB) They would be protected from the diseaseC) They would be exposed to a weaker form of the virusD) They were part of the control group

Answers

Answer 1

Answer:

The correct answer is option D. they were part of the control group.

Explanation:

A control group is a group of subjects different from the other test subject as they did not get the independent variable's effect on them and separated from the rest of the experiment. This group of subjects is used to rule out any other explanation of the effect of the independent variable.

In this experiment, subjects that received a placebo injection are the control group as they did not expose to the mutated virus and there are the presence of antibodies in the blood.


Related Questions

Compare the nervous system of the shrimp to that of a vertebrate.

Answers

Answer: The majority of animals on our planet, about 95 percent, do not possess a true backbone and are called invertebrates. It's common knowledge that vertebrates like humans have a complex nervous system that reacts to stimuli, but much less is known about invertebrates like shrimp and insects. While it's somewhat different from that of vertebrates, shrimp do have a central nervous system comprised of four main parts.

Explanation:

The nervous system is a highly specialized organ found in vertebrates.

The nervous system

The nervous system is a complicated system in the body of a vertebrate that is made up of the peripheral nervous system, which includes cranial nerves, spinal nerves, involuntary nerves, etc., and the central nervous system, which includes the brain and spinal cord.Neurons in the nervous system primarily relay signals to the various bodily parts.Somatic and visceral components are part of the peripheral nervous system.The two halves of the vertebrate nervous system are the grey matter and the white matter.The central nervous system and the peripheral nervous system make up the nervous system.The spinal cord and the brain, which regulate all bodily functions, make up the central nervous system.The cranial and spinal nerves, on the other hand, are part of the peripheral nervous system, which links the central nervous system to the rest of the body.Nerves carry electrical impulses from the skin and other sensory organs to the brain, which interprets the stimuli and delivers a reaction to the muscles and glands of the body.

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Effects of hurricanes

Answers

Answer:

Storm surge, tornadoes, heavy rainfall, high winds, riptide, and death are the most major effects of hurricanes. While a hurricane is approaching the coast, the sea level increases swiftly. Since the sea level rises, the amount of water can cause many deaths from drowning.

Explanation:

mark BRAINLIST

thx

Answer: They Produce strong winds and storm surge flooding,heavy rain fall that can result house and buildings flooding,and rip currents and it can also cause Tornadoes.

HELP PLEASE!! NEED ANSWER REALLY QUICK!

Answers

Answer:

b

Explanation:

Which type of cancer is the fastest growing? Explain your answer, using your relevant data.
What changes happen in cancerous cells?

Answers

Answer:

more pain

Explanation:

some cells will die and this disease cannot be

treated and you would feel more pain

and so dangrous

Plz Help! Will Name Brainliest!!

Answers

there is a quizlet for that
Anwser:

You would have to post a picture of the thing that you read

I'll give BRAINLIEST TO BEST ANSWER.

If you were to leave a pan of water outside for several days what would happen
Write a scientific report on the what would happen, and how would they relate to the tree states of water: solid, liquid and gas.

At least 3 PARAGRAPHS.​

Answers

Answer:

It might pass the three of them

Explanation:

It depends on the weather

How is the process of photosynthesis essential to sustaining life on Earth?​

Answers

Answer:

Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Without photosynthesis, the carbon cycle could not occur, oxygen-requiring life would not survive and plants would die.

... The importance of photosynthesis in our life is the oxygen it produces.

Answer:

without the process of photosynthesis, plant would not be able to provide glucose (the food they consume) and in turn, they would die. Plants also produce )2 as a byproduct of photosynthesis which humans depend on so they we breathe.

Explanation:

What is the definition of erosion in rock biology?

Answers

Answer:

Erosion is the process where rocks are broken down by natural forces such as wind or water. There are two main types of erosion: chemical and physical.
Erosion is the process where it is broken down by natural forces such as wind and water. There are two types of processes: chemical and physical. I hope this helped and it was what u were looking for :)

Name of Tail-like organelle used by some protist

Answers

Answer:

flagellum

Explanation:

Flagellum enable some protist to move

QUICK! 30 POINTS

D is crossed out because it is wrong.

Answers

Answer:

C. There is a loss in energy

Explanation:

What happens over time to rock that is stressed?
A The rock becomes gravel
D. The color of the rock changes.
C. The rock melta to liquid
D. The shape of the rock deforms
SUMMIT

Answers

Answer:

The rock becomes gravel

Explanation:

Answer:

The shape of the rock deforms

Explanation: i took a quiz on a.pex and it was right

What happened when Earth's first atmosphere collapsed? Will mark you as brainliest!

- it created oxygen

-it formed the oceans

-it triggered an ice age

-it fell as rain, watering the earliest plants

Answers

Explanation:

solar radiation would break atmospheric water into oxygen, which would react with carbon on the Earth to form carbon dioxide. The air would still be too thin to breathe. The lack of atmosphere would chill the Earth's surface.Plants and land animals would die

This is one explanation of enzyme specificity that states an enzyme and its substrate possess specific complementary geometric shapes that fit exactly into one another.

Answers

Answer:

here for the points ahah srry

Explanation:

Why are water striders able to "walk on water"?​

Answers

Answer:

Water striders can walk on top of water due to a combination of several factors. Water striders use the high surface tension of water and large hydrophobic legs to help them stay above water. Water striders use this surface tension to their advantage through their highly adapted legs and distributed weight.

Hope this helps :)

How does a daffodil population benefit from reproducing sexually instead of asexually?

Answers

Answer:

Daffodils are plants that can perform both asexual and sexual reproduction. How does a daffodil population benefit more by reproducing sexually than asexually? It can reproduce more rapidly. It can adapt faster to its environment.

What’s the definition of circulatory system

Answers

Answer:

Circulatory system: The system that moves blood throughout the body. The circulatory system is composed of the heart, arteries, capillaries, and veins. This remarkable system transports oxygenated blood from the lungs and heart throughout the body via the arteries.

Explanation:

hope this helps love!! <3

Answer:

Moves blood around your body

Explanation:

Jorge conducted an experiment and included the graph shown below as part of his lab report.
Jorge's experiment involved which of the following? DS
(5 Points)
A change in the chemical properties of a substance
The formation of a new substance.
O A physical change
A chemical change.


Plsss help

Answers

Answer: A

Explanation:

What type of wave moves the audio and visual signals?

Answers

Answer:

electromagnetic waves to be honest but Transducer Waves

Explanation:

Answer:

A carrier wave.

Explanation:

I just took the Televisions Quiz and got it right. :)

PLEASE HELP DUE BY 8:30 tomorrow

Answers

Answer:

increasing

Explanation:

the sun is not bad for plants. In fact, it makes them grow. Its like without no food.

What is noise pollution?​

Answers

harmful or annoying levels of noise, as from airplanes, industry, etc.

Which one of the following organisms IS EATEN BY AN OMNIVORE in this food web?

If you don’t know the answer please don’t guess bc this is ixl and it’ll start me over.

Answers

Answer:

the cytoplankton

Explanation:

21. Where is this energy stored in glucose?

Answers

Answer:

Glucose is a type of sugar, which obv is food.

Explanation:

Glucose is energy

Hope This Helps.pls mark brainliest

What event changes an atom into an ion?

Answers

Answer:the gain or loss of one or more electrons (B)

Explanation:

describe the effects that enzymes can have on substrates​

Answers

Answer:

Enzymes bind with chemical reactants called substrates there may be one or more substrates for each type of enzyme I beleivedepending on the particular chemical reaction. In some reactions, a single-reactant substrate is broken down into multiple products the enzyme's active site binds to the substrate.

Explanation:

Hope this helps.

Answer:

When an enzyme binds its substrate, it forms an enzyme-substrate complex. This complex lowers the activation energy of the reaction and promotes its rapid progression by providing certain ions or chemical groups that actually form covalent bonds with molecules as a necessary step of the reaction process

Explanation:

hope this helps

Which idea explains Darwin’s observations about Galapagos Islands finches?

A) biological species concept

B) ecological species concept

C) endangered species extinction

D) sympatric speciation

Answers

Answer:

I think the answer is A) biological species concept

Plants have an added layer that animal cells do not. What is that added layer called?

Answers

Answer:

a cell wall

Explanation:

A garden supply company has an advertisement selling beneficial bacteria. They claim that the bacteria will help gardeners grow better gardens because of better soil. What can some bacteria do for soil?


increase clay content

provide water

slow down weathering

improve fertility

Answers

Answer:

D. improve fertility

Explanation:

A garden supply company has an advertisement selling beneficial bacteria. They claim that the bacteria will help gardeners grow better gardens because of better soil.

This claim is simply based on the premise or fact that some bacterias can improve fertility of the soil.

Some species of bacterias are living microorganisms that are capable of decomposing organic matter into nitrogen, carbon and other nutrients, which are then released into the soil in a plant available form when in excess and this cycle continues with reproduction of new bacterias.

Some examples of these bacterias are Klebsiella, Anabaenopsis, Beijerinckia, Azotobacter, Clostridium, Anabaena, Nostoc, Bacillus etc.

what is glandular system​

Answers

Answer:

the endocrine system is the collection of glands that produce hormones that regulates metabolism, growth and development, tissue function, sexual function, reproduction,sleep and mood,then other things.

Answer:

The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.

Number of chromosomes?
Sex of individual?
Normal? Yes or no.
If abnormal, what chromosome pair?

Answers

Hey There!_____________________________________Answer:KAROTYPE:

This is the picture of karyotype. Karyotype is a collection of a Individuals chromosome. Like pairs are separately represented from the unlike pairs, It is generally used to study the chromosomes and the abnormalities found in the number of chromosomes.

_____________________________________CHROMOSOMAL NUMBER 18:

Every chromosomal pair seems fine, except the chromosomal pair number 18. Because as you ca see that it has 3 chromosomes instead of 2. This impairment in the chromosomal pair is called trisomy as it has 3 chromosomes.

_____________________________________TRISOMY 18:

Trisomy 18 is also called Edwards syndrome. It is a chromosomal condition associated with abnormalities in more than one part of the body. Individuals with trisomy 18 often mature slowly than normal fetus before birth and they have lower weight at the time of birth as compared to the other children.

_____________________________________Best Regards!'Borz'

There are 23 pairs of chromosomes in total, and the individual is male because it has one X and two Y chromosomes, but this individual is abnormal because of the trisomy in the 18th chromosome, as the 18th pair has three chromosomes.

What is the chromosomal abnormality?

The chromosomal abnormality is caused by the mutation in the chromosome number and includes either the deletion of the chromosome or the addition of the chromosome in a homologous pair. The chromosomal abnormality has many negative consequences as well, some extra copies in the sex chromosome pair cause infertility, etc., while deletion causes life-threatening conditions.

Hence, there are 23 pairs of chromosomes in total, and the individual is male because it has one X and two Y chromosomes, but this individual is abnormal because of the trisomy in the 18th chromosome, as the 18th pair has three chromosomes.

Learn more about the chromosomal abnormality here.

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i need help with 5-10 please

Answers

Answer:

5. C. C6H12O6 + O2 ➡️CO2 + 02 + ATP

6. D. It breaks down glucose to form ATP.

7. D. All autotrophs are producers

8. D. All 4 statements are correct.

9. False

10. False

Explanation:

The process of photosynthesis converts carbon dioxide and water into glucose and oxygen while the in the process of cellular respiration, glucose and oxygen are converted to water and carbon dioxide and ATP is formed.

In photosynthesis, glucose is formed while in cellular respiration ATP is formed. The process of forming ATP and glucose are ways in which energy is cycled and oxygen cycle occur in the atmosphere. Energy can not be recycled but it is rather used. Only green plants carry out photosynthesis. Autotrophs are known to be primary producers.

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