A scientist is investigating a new drug that will cure the common cold. The scientist should give the __________ group an empty pill, rather than the pill with the drug being tested.
1. variable
2. control
3. test
4. experimental

Answers

Answer 1
Answer is experimental.

Related Questions

when you eat a large meal and your body absorbs a lot of glucose and that makes its way to the interstitial fluid before going into the cell. 100% of the glucose should be absorbed into the cell from the interstitial fluid. why does nearly all of the glucose enter the cell, rather than only half of it?

Answers

Since the cell modifies it, there's more glucose outside the cell than within.

Cell- The research of structure and function of cells is known as cell biology, and it is based on the idea that a cell is the basic building block of all life. A thorough grasp of the organisms and tissues that cells make up is made possible by concentrating on the cell.

Tissue- A biologic organization level between cells and an entire organ is called a tissue. A tissue is a group of comparable cells from the same origin, along with their extracellular matrix, that work together to perform a single function. Then, various tissues are functionally grouped together to form organs.

To know more about the Cell, click on the below link.

https://brainly.com/question/12129097

#SPJ4

During exponential growth, a population always a. has a constant, instantaneous per capita growth rate. b. quickly reaches its carrying capacity. c. cycles through time. d. loses some individuals to emigration.

Answers

According to the given statement Has a constant, instantaneous per capita growth rate.

The correct option is A.

Why is growth rate important?

The percentage changes in a particular variable over a predetermined period of time are known as growth rates. Depending on whether the magnitude of the variable is growing or shrinking over time, growth rates can either be positive or negative.

What is an example of a growth rate?

Growth rates accumulate with time; if a variable's growth rate is constant, the change in the variable will only get bigger with time. Assume, for instance, that GDP will be 20.0 in 2020 and will increase by 10% annually. The GDP is 22.0 in 2021 (an rise of 2.0), but it is 24.2 in 2022. (an increase of 2.2).

To know more about Growth rate visit:

https://brainly.com/question/13870574

#SPJ4

Describe the difference between supportive connective tissue and fluid connective tissue.

Answers

Fluid connective tissue is blood. The cells circulate in a liquid extra cellular matrix.

Supportive is bone and cartridge. It provides structure and strength to the body and protect soft tissues.

Mostly the difference is one holds the structure and the other holds the make up of blood.

The marine iguana (Amblyrhynchus cristatus), which spends long periods under water feeding on seaweed, relies on both salt glands and kidneys for homeostasis of its internal fluids. Describe how these organs together meet the particular osmoregulatory challenges of this animal's environment.

Answers

These organs together meet the particular osmoregulatory challenges of this animal's environment is Iguanas

Iguanas consume a much of salt when they eat. To keep homeostasis, it is necessary to minimize or get rid of the many ions that are present in seawater. Salt glands use active ion transport to release a fluid in order to do that. It has a salt content lower than sea water. Urine produced by the kidneys can be either iso- or hyperosmotic to bodily fluids. By reabsorbing water, urine, and feces, the bladder's epithelium aids in fluid conservation even if it may enable too much water to escape the body.

In order to preserve equilibrium, the body expels accumulated salt.

The movement of ions over a concentration gradient is referred to as active transport. Transporting ions from a low concentration area (salt) requires energy.

To learn more about Iguanas, visit:

https://brainly.com/question/8622995

#SPJ4

How are otoliths adaptive for burrowing mammals, such as the star-nosed mole?

Answers

Because light cues are lacking in habitats like the star-nosed mole's tunnel habitat, otoliths sense the animal's position with regard to gravity.

Why are they known as star-nosed moles?

In the northern regions of North America, you can find the little star-nosed mole in low, wet environments. The only surviving member of the Cordyline tribe, it has more than 25,000 tiny sensory receptors in touch organs.

Why do ears have otoliths?

The inner ear's otoliths (ear-stones), which are tiny organs, detect linear acceleration and gravity.

What purpose do otoliths serve?

The otolith organs detect linear acceleration brought on by the start of a straight line of motion as well as gravity. People and animals with damaged or absent otolith organs have a worse sensation of motion and orientation to gravity.

To know more about the star-nosed mole visit:

https://brainly.com/question/1603839

#SPJ4


Describe how an island's size and distance from the mainland affect the island's species richness.

Answers

An island's size and distance from the mainland will affect the island's species richness in that immigration of species to islands declines with distance from the mainland and increases with island area.

What is an Island?

This is defined as an isolated piece of habitat which is surrounded by another such as water and species richness in the region varies according to different factors.

Immigration of species( species richness) to islands declines with distance from the mainland and increases with island area which is how the species richness is affected in this type of scenario and makes it the correct choice.

Read more about Island here https://brainly.com/question/15750467

#SPJ4

Atp is necessary for life because ________. it is the principal energy carrying molecule in a cell

Answers

In conclusion, the statement 'Adenosine triphosphate (ATP) is necessary for life because it is the principal energy-carrying molecule in a cell' is TRUE.

What is Adenosine triphosphate (ATP)?

Adenosine triphosphate (ATP) is the energy coin of cells used to carry out metabolic functions such as growth, reproduction, differentiation, etc.

The energy released by the hydrolysis of phosphate bonds in the Adenosine triphosphate (ATP) molecule is used to couple it with energy requiring chemical reactions in the cell.

In conclusion, the statement 'Adenosine triphosphate (ATP) is necessary for life because it is the principal energy-carrying molecule in a cell' is TRUE.

Learn more about Adenosine triphosphate (ATP) here:

https://brainly.com/question/897553

#SPJ1

In a short essay (100-150 words), discuss how different types of energy investment by females contribute to the reproductive success of a frog, a chicken, and a human.

Answers

Frogs lay eggs and incubate them themselves. Once the egg is formed there is no interaction between the frog and its offspring.

Instead, they produce a large number of eggs, resulting in high reproductive success. Females spend less energy on eggs than humans or chickens.

Chickens lay eggs through sexual reproduction. When it lays an egg, it hatches the egg. This takes from 21 days to 1 month. Therefore, the energy investment for hatching eggs is higher for chickens than for frogs. Chickens have a lower reproductive success rate than frogs because they lay less eggs than frogs.

Humans do not lay eggs. They go through the embryonic stage to form a zygote that matures offspring. Their energy investment phase is longer than others, as they take nine months to feed a fertilized egg.

Reproductive success is low because only one fertilized egg is produced at a time

Learn more about Reproductive system:

https://brainly.com/question/940283

#SPJ4

Explain why a population that fits the logistic growth model increases more rapidly at intermediate size than at relatively small and large sizes.

Answers

Each person has little resources available when there are a lot of them, and the population expands slowly.Each person acquires more resources and population growth is rapid at low densities or sizes.Because reading takes place when there is still enough of room and resources in the environment, new members are incorporated into the community most quickly at intermediate population levels. How environment affects health ?

Toxins in the environment can aggravate ailments like cancer, heart disease, and respiratory problems. Low-income individuals are more likely to reside in contaminated locations and have access to contaminated water. In addition, the risk of pollution-related health issues is higher for children and pregnant women.

What environmental factors affect health ?

There are numerous specific environmental issues that can be harmful to people's health and wellness. Chemical pollution, air pollution, climate change, pathogenic bacteria, lack of access to health care, inadequate infrastructure, and poor water quality are some of these problems.

To know more about population growth visit :

https://brainly.com/question/18415071

#SPJ4

What stage of mitosis is this and describe it

Answers

Explanation:

We need a picture please

Cells can move substances directly across their membranes in three general ways: simple diffusion and ________ diffusion, which do not require energy, and _______ transport which requires an input of energy.

Answers

Answer: facilitated active

Explanation:

Cells can move substances directly across their membranes in three general ways: simple diffusion and facilitated diffusion, which do not require energy, and active transport which requires an input of energy.

What is membrane transport?

Membrane transport is the mechanism by which solutions and ions are passed across plasma membranes. The membrane, being composed of phospholipids, will generate a part of it that is hydrophobic, which is the part that faces the extracellular and intracellular spaces, and a hydrophilic part that faces the center of the plasma membrane. These characteristics mean that there is a certain degree of fluidity through it depending on its composition and temperature.

This then causes selectivity in it, for this reason it is necessary to form certain channels that allow the passage of compounds that cannot pass through it due to their size or electrical charge. within the types of transport we find: simple diffusion that is through phospholipids and does not require energy, facilitated diffusion that is through channels by its electrochemical gradient and does not require energy and active transport that does require energy and is through of channels.

Therefore, we can confirm that cells can move substances directly across their membranes in three general ways: simple diffusion and facilitated diffusion, which do not require energy, and active transport which requires an input of energy.

To learn more about membrane transport visit: https://brainly.com/question/13551784

#SPJ1

why can we use anaerobic respiration to describe the process of fermentation

Answers

Answer:

Both fermentation and anaerobic respiration occur in the absence of oxygen.

Explanation:

Fermentation is the breakdown of sugars, such as glucose and sucrose, with the absence of oxygen, in a plant.

how many elk would be found in a 2.5-acre area

Answers

For two hunters or more, Messerschmidt says the ideal minimum size land for rifle hunting elk  is about 50 acres.

What do elk  do?

Males have large horns, which weigh up to 35 kg. These horns are used, for example, in competition for the female. Moose are solitary, good swimmers and can run up to 56 km/h. These animals are most active at sunrise and sunset.

Where does the elk live?

Several subspecies of moose are native to Norway, Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Poland, the US, and Canada. They live in deciduous and boreal forests, with a diet consisting mainly of tree buds and woody plants.

Learn more about elk in brainly.com/question/27600240

#SPJ1

50 points look at screenshot

Answers

Carbohydrate: starches and sugars, glucose and sucrose

lipids: can be utilized for energy if sugars are not available

protiens: DNA or RNA, antibodies

nucleic acid: forms hydrophobic part of membrane

The ____ suture is a single suture line that articulates the left and right sides of the palate.

Answers

The median palatine suture is a single suture line that articulates the left and right sides of the palate, which is found behind the incisive canal between right and left palatine bones in the mouth.

What is the median palatine suture?

The median palatine suture can be defined as a specialized closure suture located in the cranial bones which has as function to allow the growth of the maxilla.

In conclusion, the median palatine suture is a single suture line that articulates the left and right sides of the palate, which is found behind the incisive canal between right and left palatine bones in the mouth.

Learn more about the cranial sutures here:

https://brainly.com/question/4537715

#SPJ1

oxygen choose one: a. can be used as a terminal electron acceptor by microbes capable of cellular respiration, thereby generating more energy than other pathways. b. is required by all microbes except for some types of extremophiles. c. is relatively chemically inert. d. is a needed substrate for all metabolism.

Answers

Oxygen (a) can be used as a terminal electron acceptor by microbes capable of cellular respiration, thereby generating more energy than other pathways.

Electron acceptors play a crucial role in the process of synthesis of energy.  These receive electron from one substrate or acceptor and transfer it to another. With this transfer of electrons is coupled the transfer of protons that generates a proton gradient across the membrane, thereby helping in the synthesis of energy.

Cellular respiration is the process of breakdown of food to generate energy in the form of ATP. This process occurs in the presence of oxygen.  

To know more about cellular respiration, here

brainly.com/question/13721588

#SPJ4

which will increase the heart rate? group of answer choices norepinephrine stimulation of the sa node by sympathetic nerves acetylcholine stimulation of the sa node by sympathetic nerves acetylcholine stimulation of the sa node by parasympathetic nerves norepinephrine stimulation of the sa node by parasympathetic nerves

Answers

The factor that will increase the heart rate is norepinephrine stimulation of the SA node by parasympathetic nerves. So the correct option is D.

What is heart rate?

The amount of times your heart beats in a minute is known as your heart rate. Your body adjusts your heart rate naturally to fit what you're doing or what's going on around you. Because of this, your heart rate increases at times of activity, excitement, or fear and decreases during times of rest, serenity, or comfort.

Your heart rate is a crucial sign of your general health. A high or sluggish heart rate may indicate a cardiac condition or other health issues. Having the capacity to feel your heartbeat all around your body may also help doctors identify medical issues.

Therefore, the correct option is D.

Read more about heart rate, here

https://brainly.com/question/1155838

#SPJ4

The substances in a chemical reaction that are combined or separated to form new substances are the _______.
A.
chemical equations
B.
products
C.
reactants
D.
coefficients

Answers

Answer:

products...............

Explain why destroying the remaining tropical forests might harm humans and lead to a mass extinction.

Answers

The disappearance of tropical forests might accelerate global warming. People would also suffer if the world's remaining tropical forests were destroyed since they rely on the biodiversity of the planet for a variety of goods and services.

When one or both copies of a gene are the ______ allele, then this allele's form of the trait will be exhibited

Answers

When one or both copies of a gene are the dominant allele, then this allele's form of the trait will be exhibited.

In the field of genetics, we can simply describe alleles as the variant forms of a single gene.

It is due to the expression of an allele that certain characteristics are observed in an organism.

For a trait to express itself in the phenotype, the allele for the trait either needs to be homozygous dominant or heterozygous dominant.

An allele that is able to mask the effect of the other allele of the same type is referred to as the dominant allele. An allele that gets masked by the other allele is referred to as the recessive allele.

For a trait to express itself, the allele needs to be dominant i.e either one copy of the dominant allele should be present or both the alleles should be dominant. In case both the alleles are recessive, then the recessive trait will be expressed.

To learn more about dominant allele, click here:

https://brainly.com/question/2717245

#SPJ4

Electrolytes, (to identify a few: na , k , mg cl-), account for approximately ________ of the solutes in the body.

Answers

Electrolytes  are found  in the body are calcium , potassium,phosphate, chloride  , Magnesium and sodium.

What is the most common electrolyte imbalance?

Hyponatremia is the most common form of electrolyte Disorder in the emergency room . The symptoms are unspecific and include nausea , dizziness and often falls. Typical symptoms of severe hypernatremia are vomiting, cerebral seizures ,somnolence and even coma.

Sodium , calcium , potassium,chloride ,phosphate and magnesium are all electrolyte. The levels of in your body can become too low or too high .

To learn more about Electrolyte refer

https://brainly.com/question/14566383

#SPJ4

a thermomet is used to check chicken being cooked on gill what must food handler do before using same theremoms to check food on serving line

Answers

a thermomet is used to check chicken being cooked on gill,  a food handler    must do Wash, rinse, sanitize, and air-dry thermometers before using same theremoms to check food on serving line.

thses ethe some instruction food handler can follow -

Wash, rinse, sanitize, and air-dry thermometers before and after using them.Calibrate them before each shift to. ensure accuracy.Make sure thermometers used to measure the temperature of food are accurate to. ...Only use glass thermometers if they are enclosed in a shatterproof casing.Always put the thermometer stem or probe into the thickest part of the food. A bimetallic stemmed thermometer should be put into food from the tip to the end of the sensing area. Before you record the temperature, wait for the thermometer reading to steady.

to know more about bimetallic stemmed thermometer click here

brainly.com/question/24881415

#SPJ4

What is the total damage imposed as a result of producing the efficient level of fertilizer?

Answers

Crop yields must be increased while spending less, and it's important to comprehend the aspects that affect how effective fertilizers are overall.

What is negative impact of fertilizers?

Negative effects on plant and animal life, including people, can result from improper management of nutrients.

Other contaminants linked to animal manures and commercial fertilizers.

Algal blooms that cause surface waters to lose oxygen, pathogens, and nitrates in drinking water, and the release of smells and gases into the atmosphere are a few of these effects.

Therefore, the total damage imposed as a result of producing the efficient level of fertilizer.

Learn more about fertilizer here:

https://brainly.com/question/9626033

#SPJ4

what statements correctly describe the processing of the pre-mrna that must take place to generate a mature mrna?'

Answers

The statements that correctly describe the processing of the pre-mRNA that must take place to generate a mature mRNA are:

A. Noncoding sequences called introns are spliced out by molecular complexes called spliceosomes.

C. A cap consisting of a modified guanine nucleotide is added to the 5' end of the pre-mRNA.

D. A poly-A tail (50-250 adenine nucleotides) is added to the 3' end of the pre-mRNA.

mRNA is the messenger RNA that encodes the information of the DNA. mRNA is formed by the process of transcription by the enzyme RNA Polymerase II. It carries the information to form the protein.

The question is incomplete, the complete question is:

What statements correctly describe the processing of the pre-mRNA that must take place to generate a mature mRNA ?

A. Noncoding sequences called introns are spliced out by molecular complexes called spliceosomes.

B. A translation stop codon is added at the 3' end of the pre-mRNA.

C. A cap consisting of a modified guanine nucleotide is added to the 5' end of the pre-mRNA.

D. A poly-A tail (50-250 adenine nucleotides) is added to the 3' end of the pre-mRNA.

E. Coding sequences called exons are spliced out by ribosomes.

To know more about mRNA, here

brainly.com/question/22664176

#SPJ4

The experiment that showed that the amount of a,t.g and c is the same from species to species is?

Answers

The experiment that showed that the amount of A, T, G and C is the same from species to species is Chargaff's experiment.

Chargaff's experiment determined the concentrations of the nitrogenous bases present in the DNA of the species. He concluded that amount of A and T as well as G and C remains the same in every species. This was proved by performing paper chromatography and UV spectrophotometry.

The amounts of adenine (A) and thymine (T) is the same because they form bonds with each other only. Similar is the case with guanine (G) and cytosine (C). A and T form double bonds while G and C form triple bonds.

To know more about Chargaff's experiment, here

brainly.com/question/14702890

#SPJ4

identify all of the following that are functions of proteins. multiple select question. support and structure energy storage transport molecules antibodies for defense genetic material enzymes

Answers

Functions of proteins are support and structure transport molecules.

What is protein ?

A protein is a naturally occurring, extremely complex molecule composed of amino acid residues connected by peptide bonds. Proteins can be present in all living things and contain a wide range of vital biological components such as enzymes, hormones, and antibodies.

What are the function of proteins?

Protein serves numerous functions in your body. It aids in the repair and growth of tissues, allows metabolic reactions to occur, and organizes biological operations. Proteins not only provide a structural basis for your body, but they also maintain optimum pH and fluid balance.

To know more about antibodies :

https://brainly.com/question/27931383

#SPJ4

Stress hormones can inhibit the production of _____, white blood cells that circulate in the body and are an important part of the immune system response to combat illness.

Answers

Stress hormones can inhibit the production of lymphocytes which forms the white blood cells that circulate in the body and are an important part of the immune system response to combat illness or disease.

What are Lymphocytes?

These forms part of the immune system which fights diseases and infections in organisms and are produced in the bone marrow and lymphatic vessels.

They circulate in the body and are important components of the immune system, however their production is usually inhibited by stress hormones such as cytokines etc thereby weakening the system.

This is therefore the reason why lymphocytes was chosen as the most appropriate choice.

Read more about Lymphocytes here https://brainly.com/question/1995778

#SPJ1

Which is most likely the reason zebras and horses are considered separate species?
They cannot breed.
Their offspring cannot breed.
They look different from each other.
They are found in different habitats.

Answers

Species are the level of taxonomical classification. Zebras and horses are closely related species. They are considered as separate species because they cannot breed.

Thus, the correct option is A.

What is Species?

Species is a group of organisms that can interbreed to produce fertile off-springs. They cannot breed under natural conditions.

Zebras and horses are the two different species which belong to the same horse family Equidae. Zebras are considered as wild horse as they belong to same family.

Under natural conditions these two species cannot breed. If Zebras and horses interbreed, the offspring produced from this will be sterile. The offspring cannot breed.

Therefore, Zebras and horses cannot breed under natural conditions. Hence, option A is correct.

Learn more about Species here:

https://brainly.com/question/15074232

#SPJ1

In order to reproduce sexually, what do animals need to compete for?

Answers

Answer: In order to reproduce sexually, both males and females need to find a mate.

Explanation: males typically compete among themselves for access to females, whereas females tend to be choosy and mate only with preferred males. In sexually reproducing species, every offspring has one father and one mother, so the average reproductive success is equal for both males and females. Most organisms reproduce by mating, which increases the genetic variability of the organism. The males and females have separate reproductive organs known as gonads. These gonads produce gametes that fuse together to form a single cell called the zygote. Few animals such as earthworms, snails, slugs, etc.

 HOPE THIS HELP. ✨

Which component is an example of a biotic factor found in an attic ecosystem

A. Ice
B. Foxes
C. Snow
D. Rocks

Answers

Do you mean “arctic”? If so the answer is foxes.
Other Questions
Ms. Francis is planning a birthday party for her daughter. There will be 22 children at the party, and in order to seat them all she needs to rent square card tables. Only 1 child can sit at each side of a card table.Ms. Francis wants to arrange the tables in a rectangular shape so they look like one large table. The room is large enough thatthe rectangle can be made with more than one row of tables.Part A: How many different arrangements can Ms. Francis make to seat all 22 children?Part B: What is the smallest number of tables that Ms. Francis needs to rent?DIRECTIONS: To solve the problem, apply the steps of the Mathematical Problem-Solving Routine.Understand1. Try to visualize the situation. Consider drawing a diagram2. State the problem in your own words.3. What is the important information in the problem?Plan4. What strategy will you use to solve the problem? Why?Predict an answer. Think of two or three texts you have read in school that were written in the twentieth century. Write down their titles and explain, based on the information here, whether you think they are modernist or postmodernist works. Use evidence from this text to support your assertions. Kennedys reference to our forebears (line 4(our forebears)) serves mainly to Which axis is triangle ABC reflected across? Find the perimeter and area of the figure if each unit on the graph measures 1 centimeter. Round answers to the nearest tenth, if necessary.Perimeter:rea: What is La amistad in plural form question 2(multiple choice worth 1 points) (01.04 mc) which colonial area or areas placed a high value on religious freedom? middle and southern new england and middle new england only southern and new england ______ are released from axon terminals and are detected by protein receptors on an adjacent neuron. Olivia purchases gifts for her mom and grandma for Mothers Day the first pair as a pair of sunglasses for $16.35 and the second is a bracelet your total is 39 and $.75 how much did she spend on the bracelet four identical metallic spheres with charges of +5.0 c, +4.2 c, 3.8 c, and 2.8 c are placed on a piece of paper. the paper is lifted on all corners so that the spheres come into contact with each other simultaneously. the paper is then flattened so that the metallic spheres become separated. (a) what is the resulting charge on each sphere? 0.65 correct: your answer is correct. c (b) how many excess or absent electrons (depending on the sign of your answer to part (a)) correspond to the resulting charge on each sphere? -4.0625e13 incorrect: your answer is incorrect. what is the charge of an electron/proton? electrons are ---select--- joyce is laid off from her job with the heavy equipment manufacturer due to a decrease in the demand for heavy equipment caused by a recession. she searches for a job for five months and then is rehired by her old employer when the economy begins to recover. while joyce was looking for work, she was: What are the three branches of government? 1. The legislative branch makes the laws. It is headed by congress. Congress includes the senate and the house of representatives. 2. The judicial branch is headed by the supreme court. It interprets the laws by analyzing the constitution, reviewing laws, and making decisions about states rights. 3. The executive branch enforces the laws. It is headed by the president of the united states. The executive branch is in charge of the military, communicates with other countries, and can veto a law. How many zeros will be in the product of 7 times 5,000? Without calculating the answer, explain how to use place value strategies to find the number of zeros in the product Here are two box plots:9595100100105box plot A105box plot B1101101151151. Which box plot has a greater median? v2. Which box plot has a greater measure of variability In the figure below, m Z1=(x+88) and m2=3x.Find the angle measures.J12m21=m42= ortuso, roberto d., and kaori sugihara. "detailed study on the failure of the wedge calibration method at nanonewton setpoints for friction force microscopy." the journal of physical chemistry c, vol. 122, no. 21, american chemical society (acs), may 2018, pp. 1146474, doi:10.1021/acs.jpcc.8b03583. she predicts she will receive $14,000 in grants annually. catherine does not own a car and plans to live near campus where she will rely on the free bus system for transportation. what is the minimum amount catherine should expect to contribute to her education annually? $31,570 $34,030 $45,570 $48,030 An angle and a ray are drawn on a piece of paper, what is the maximum number ofpoints at which the two figures could intersect?A. 0B. 1C. 2D. 3E. infinitely many (6(2 + 4) - 1)/(2 * 3 + 1)Evaluate each expression using the order of operations Which of the following best describes prokaryotes and eukaryotes? Prokaryotes have a nucleus and eukaryotes do not. Prokaryotes do not have a nucleus; eukaryotes have a nucleus. Both have membrane-bound structures. Prokaryotes have membrane-bound structures and eukaryotes have free floating organelles.