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


In an animal cell, cellular respiration happens in the

Answers

A:) In cellular respiration, the carbohydrates from food are disassembled into glucose molecules. Then, this glucose is used to produce energy-rich ATP molecules. In most eukaryotic organisms, cellular respiration takes place in the mitochondria of cells.

Answer:

It happens in the Mitochondria

Explanation:

How is agrovoltaics different from floatovoltaics? How are they similar?

Answers

Answer:

they are very similar

Explanation:

Select from the drop-down menu to correctly complete the statement. Organs combine to form... Plz help​

Answers

Answer:

An Organ system

Explanation:

Answer:

An Organ System

Explanation:

NOT an organism

Don't get it mixed up

Honey Bunches

EASY 10 POINTS

Why do plant cells need chloroplasts?

Answers

Answer:

Chloroplasts are organelles found in plant cells and eukaryotic algae that conduct photosynthesis. Chloroplasts absorb sunlight and use it in conjunction with water and carbon dioxide gas to produce food for the plant. In this respect they are similar to mitochondria, but are found only in plants and protista.

Explanation:

mark BRAINLIST!

thx

Cells in the body that can divide repeatedly and become other types of
cells are called *
O stem cells
O embryo cells
connective cells
O reproductive cells

Answers

Stem cells,
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.

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The Correct choice is :

Stem cells

Which graph shows a car is stopping at 1 stop sign to the next? (8th grade science)

Answers

Answer:

the answer to this complicated question is c

Point (-2,5), Slope = -4
Point-slope
Slope-intercept

Answers

Answer:

if the slope is -4 than the slope intercept form is y=-4x+13

Explanation:

this is because since you need to find the y-intercept you need to add 1 and add 4. 1 to the x values and 4 to the y values.

Answer:

y=mx+b = y=−4x−3

Point Slope = y−5=−4⋅(x+2)

Explanation:

discuss the importance of amino acid to proteins

Answers

There are 20 different types of amino acids that can be combined to make a protein. The sequence of amino acids determines each protein's unique 3-dimensional structure and its specific function. ... These proteins provide structure and support for cells. On a larger scale, they also allow the body to move.


17. What could be some things that impact increases and decreases of inflow?

Answers

Answer:

based on the the slope

Explanation:

those are based on slope

The table provides data about the frequency of traits in a population over several generations,
Based on this data, which trait provided individuals with an advantage in response to an
environmental change that happened between the fifth and tenth generations? *
Trait
1st Generation
5th Generation
10th
Generation
A
25%
3%
10%
B
25%
20%
70%
с
25%
30%
12%
D
25%
40%
15%

Answers

Answer: The answer is B

Explanation:

1
10
TIME REMAINING
01:53:12
Which statement describes what will most likely occur when warm air cools and the temperature drops to the dew
point?
Air will become more humid.
• Solid ice will form on leaves
Cumulus clouds will disappear.
Water vapor in the air will evaporate.

Answers

Answer:

Air will become more humid

Explanation:

due to the cooling of the air

Answer:

air will become more humid

Explanation:

________ are individual organisms with a gastrovascular cavity and circle of tentacles that make up coral.
A) Polyps
B) Algae
C) Nematocytes
D) Planulae
E) Atolls​

Answers

I think it’s A. Hope this helps :)


Honey Bees have a much different social and reproductive structure as compared to humans.
With honey bees, the queen bee contains more chromosomes with 32 than her drones do at
16 chromosomes. If the queen bee is identified as a Diploid, how would the drones be
classified?
O Haploid
O Diploid
O Monosomy
O Trisomy

Answers

Answer:

Unlike the queen bee, which has 32 chromosomes, drones have half the chromosomal charge (n= 16), so they are considered haploid.

Explanation:

The system of determination of the sex in the bees —like in other insects— is called haplodiploidy, and consists of which the females of the species possess complete charge of chromosomes, whereas the males only possess half. This is what happens with the queen bee with 32 chromosomes, while drones only have 16 chromosomes, so they are considered haploid.

Additionally, as a characteristic of haplodiploidy, males only proceed from female gametes, so they can only contribute gametes to produce females of the species.

The other options are not correct because:

Drones, with half of the chromosomal charge, cannot be diploid. Monosomy and trisomy are defects in the distribution of chromosomes during meiosis, which imply one chromosome less or one chromosome more in the normal chromosome charge respectively.

FUN FACT OF THE DAY (day:4)

A baby fox is called a kit
A baby alligator is called a hatchling
A baby armadillo is called a pup
A baby fish is called a fry or fingerling

Answers

Answer:

lol wow

Explanation:

A baby alligator is called a hatchling


1. Explain why both autotrophs and heterotrophs
depend on photosynthesis to obtain the energy
they need for life processes.

Answers

Autotrophs depend on photosynthesis to get the energy(ATP & NADPH) by converting light energy from the sun into chemical energy in the form of organic compounds, which they need to survive. Heterotrophs can only obtain that energy by consuming an autotroph; which depends on photosynthesis.

Which of the following is true of pine rockland habitats?​

Answers

Answer:

Dry habitat.

Explanation:

Pine rockland has a dry habitat due to their location on higher ground. Pine Rocklands, also known as the Pinelands which have a hard rocky ground, made up of limestone. Pine rockland is an endangered habitat because 98 percent of the original habitat is lost while only 2 percent is remaining. This is due to the increase in population so the human clears the area for building places.

Movement of sugar into the cell is an example of _____

Answers

Answer:

The answer is Diffusion.

Explanation:

Diffusion is a net movement of molecules or ions where it moves from a region of high concentration to a region of low concentration.

In this case, cell has a lower concentration than sugar solution.

what are the four main types of marcromolescules found in organisms

Answers

Answer: carbohydrates, lipids, proteins, and nucleic acids

Explanation:

There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids); each is an important cell component and performs a wide array of functions.

List three ways in which a sperm cell differs from other cells in the
human body

Answers

A sperm cell is the smallest human cells. An egg cell and a sperm are each other opposites

A 60kg person climbs stairs of total height of 20m in two minutes.calculate the power delivered.g:10ms

Answers

This is your perfect-answer

How should we allocate resources so that the whole human population can have enough resources to live

Answers

Answer:

RAtion foods. More systainable living

Explanation:

what came first the chicken or the egg

Answers

Actually....most common theory is that the chicken came first because...the egg shell can only be produced by a chicken not on its own....just a theory we still dont know

Eggs were found to evolve for over a billion years ago whereas chicken have been found to evolve around for just over 10,000 years. Thus, it can be concluded that eggs came first followed by the chicken.

What is Evolution?

Evolution can be defined as any net directional change or cumulative change in the characteristics or traits of an organism or populations over many generations in order to survive better in the surrounding environment.

Eggs come from chickens and chickens come from eggs. It is the ancient riddle. However, eggs are just the female sex cells which were supposed to have evolved more than a billion years ago, whereas chickens have been found to evolve around for just 10,000 years ago. Therefore, it can be said that the eggs have came first followed by chickens.

The amniotic eggs shows up to roughly 340 million or so years ago, and the first chickens evolving at around 58 thousand years ago at the earliest. Thus, eggs were around way before chickens even existed.

Learn more about Egg here:

https://brainly.com/question/20562182

#SPJ2

Most of the oil and natural gas used today formed where forces within Earth folded and tilted thick rock layers.
O True
O False

Answers

The correct answer is true.

Most oil and natural gas formed where forces within Earth are folded and tilted thick rock layers, and they are also formed with plankton in which is concealed with sediment (a natural & solid material that is fertile to enrich nutrients in soils).

I hope this helps you, have a great day. :)

Someone please help me out!!!!!
How do you think the body processes monosaccharides differently than polysaccharides? Would they take the same amount of time to digest and harvest energy?

Answers

Answer:

Polysaccharides from cell walls make up the fiber humans eat, while monosaccharides provide the sweetness in foods. As humans eat, chewing breaks down polysaccharides into smaller particles that eventually, through digestion, yield up the simple monosaccharides that can pass into the bloodstream.

Explanation:

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:

Cell inhibitors cause cyclins to be

Answers

the answer is: degraded

Which statement below correctly summarizes cellular respiration?
A Using oxygen, cells absorb sunlight and produce glucose.
B ATP is produced in the mitochondria in the absence of oxygen.
C Water is absorbed by the mitochondria, the water is split up into hydrogen and oxygen atoms, and ATP is made.
D Cellular respiration begins with glucose. With the addition of oxygen, energy is made in the form of ATP.

Answers

Answer:

D

Explanation:

It all begins with glucose.

D.explain why I choose D? will here are some information I hope they help :)During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation. HOPE THIS HELPS PLEASE MARK ME BRILLAINT :)THANK YOU~

What is a pyramid of numbers? How does it relate to a good chain?​

Answers

Answer:

A pyramid of numbers shows the total number of individual organisms at each level in the food chain of an ecosystem that is all

Explanation:

What is the most likely explanation for the results in the graph?

A. A large growth of algae used up the oxygen in the bay.
B. A toxic chemical killed off all the fish in the area.
C. The fish are harder to catch among the algae.
D. The fish migrated to better feeding grounds.

PLEASE HELPP

Answers

Answer:

Explanation:

B. A Large growth of algae used up the oxygen in the bay

Which of these is a characteristic of sexual reproduction?A)It takes place in all cells of the body.B)It forms exact copies of the parent cell.C)It results in offspring with genetic variation.D)It requires only one parent to form a daughter cell.

Answers

Answer/Explanation:

It results in offspring with genetic variation. 2 different mates must be used in sexual reproduction. This is because each person is different since cells are produced and combined differently in the original offsprings. If the two adults were exactly the same, the offspring would have the exact same cell traits. Likewise will be done for the offspring of the two adults. The genes may be similiar to the ones of the adults, but since combined it will not be an exact replica. In the long run sexual reproduction will result in an offspring with slightly different traits or genetic variation.

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