Answer:
A. Includes at least two groups, one of which does not receive the experimental treatment
Explanation:
A control experiment can be defined as an experiment in which a condition assumed to be a probable cause of the effect is being compared to the same situation by the scientist without involving or using the suspected condition.
Also, an experimental group can be defined as a collection of participants that are subjected to the independent variable.
Generally, most scientific experiments usually have a control group so as to avail the scientists (experimentalists) an ability to compare the outcome of their test results. This control group is not given the treatment or influenced by the same independent variable as the experimental group.
Therefore, this is the reason why science completely or totally rejects any hypothesis which is not supported by observations, as well as the results obtained from control experiments.
This ultimately implies that, for any hypothesis to be acceptable in science, it must be supported by observations and the results of control experiments; this give rise to factual informations, theories and by extension solutions to problems.
Hence, a controlled experiment includes at least two groups, one of which does not receive the experimental treatment.
A controlled experiment includes a control group and at least one experimental group. Option A). A controlled experiment includes at least two groups, one of which does not receive the experimental treatment.
In a controlled experiment, the researcher wants to identify the effect of one or more variables on something.
Since many different variables might be affecting the results, and most of them are not of interest to the researcher, they must be kept under control. They must remain constant.
There must be at least two groups. One of them must be the control group, and the other one (or other ones) is the experimental group.
During an experiment, the researcher compares the two groups. Both of them are composed of individuals coming from the same population, so they are identical in all aspects except for the independent variables that the researcher changes in the experimental group to observe how they affect the individuals.
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment. The independent variable keeps constant in the control group. The experimental group receives the treatment. The researcher voluntarily changes the values of the independent variable to observe how it affects the individuals subjected. There can be several experimental groups.
Hence, A controlled experiment includes at least two groups, one of which does not receive the experimental treatment.
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16)
Lions and tigers would
struggle to coexist in the wild because both animals are large carnivores that a
the same time of the day. These two animals could not occupy the same because they would
in a
relationship.
A)
niche, competitive
B)
trophic level, commensal
C)
habitat, mutualistic
D)
population, parasitic
Answer:
I think that answer might be B
A dead body shows signs of rigor mortis in all of their upper body and in the top of their legs. Approximately how many hours has the person been dead?
Answer:
Rigor mortis first appears approximately 1-2 hours after death. Progressive stiffening occurs for approximately 12 hours, persists for approximately 12 hours, then diminishes over the next 12 hours as tissues break down as a result of autolysis and putrefaction.
Explanation:
Answer:
2-6 hours
Explanation:
big brain
Marcus's genotype for eye color is bb. Olivia has brown eyes, but she is heterozygous for the trait. What percent of the children have blue eyes? If Violet has green eyes and Jonas has brown eyes, what is Claudia's genotype? How many people in the family have blue eyes?
Explanation:
i hope it will help uuu..
A peony plant with straight stamens and red petals was crossed with another plant having straight stamens and streaky petals. The seeds were collected and germinated and the following offspring were obtained 62 straight stamens with red petals 59 straight stamens, streaky petals 18 incurved stamens, red petals 22 incurved stamens, streaky petals a) Which alleles in each pair are dominant
Answer:
Explanation:
From the given information.
Let the Straight stamens be S;
The incurved stamens be s;
The red petals be R; and
The streaky petals be r
The genotype of the parental plants are Straight stamens, red petals (SsRr) and Straight stamens, streaky petals)
So if SsRr and Ssrr crossed together, Then we have the following:
If SsRr self crossed, we have the following traits = SR Sr sR sr; &
Ssrr = Sr Sr sr sr
Then, the dihybrid cross is:
SR Sr sR sr
Sr SSRr SSrr SsRr Ssrr
Sr SSRr SSrr SsRr Ssrr
sr SsRr Ssrr ssRr ssrr
sr SsRr Ssrr ssRr ssrr
P(Straight stamens, red petals) = 8/16
P(Straight stamens, streaky petals) = 6/16
P(Incurved stamens, red petals ) = 2/16
P(Incurved stamens, streaky stamens) = 2/16
Why might both cell types be considered equally successful
Answer:
There is a greater diversity of processes within the cell because they have a nucleus and organelles. ... Both cell types can be considered equally successful because they are both surviving in today's ever-changing environment. Archaea can survive in extreme environments and bacteria can grow almost anywhere.
Answer:
Even though there are many different types of cells, they all share similar characteristics. All cells have a cell membrane, organelles organelles, cytoplasm, and DNA.
which of the following is not a fossil fuel
Answer:
hope u can get the answer from this because u didn't give me the answer options and if u did that was after I answered
Coal, oil and natural gas are examples of natural gas. Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, usually consisting of certain quantities of methane and other constituents. Therefore, biogas is not a fossil fuel.
When Jorge looks at the Moon from Earth, he sees different phases of the Moon depending on the time of the month he observes the Moon. Why does the Moon have different phases during the month?
Which type of feedback is more common in the body?
o positive feedback
O negative feedback
O neutral feedback
O electrical feedback
Answer:
Negative feedback
Explanation:
Negative feedback loops are the most common feedback loops in biological systems. The system acts to reverse the direction of change. Since this tends to keep things constant, it allows the maintenance of homeostatic balance.
Answer:
Negative feedback
Explanation:
Verified correct with test results.
Select all that apply.
During meiosis II:
chromosomes line up along the middle plate in double file
genetic variation results from crossing over
two diploid daughter cells are formed
sister chromatids split
four haploid daughter cells are formed
formecting
If two people made the exact same observation, do you think they would necessarily also make the same inference about that observation? Why or why not?
Answer:cause you probably won't make exact cause thay sometimes don't pay you exact it denpends on how you work.
Explanation:
Ethical concerns about the development and use of biotechnology include all of the following except _______.
I don't understand why some answers are saying my answer is wrong?! please answer to post
Answer:
Ethical concerns about the development and use of biotechnology include all of the following except concern about the development of new weapons.
Which is not an idea geologists use as they study Earth?
A. The rock record provides evidence of past geological events and life forms.
B. The rock record provides evidence of past human civilizations.
Answer:
A is the answer.
Explanation:
trust me
The ______ variable is the data that is collected while doing the experiment .
Look at the picture and name the Consumers and Producers in the food web.
(PLEASE HELP NOW)
Answer:
consumers:
foxbuzzardrabbitmousetitmousegrasshopperbutterflysnakefrogdragonflygreenflyladybirdproducers:
plantainberriesgrasshopperrabbitmousetitmousesnakefrogbutterflyladybirdgreenflydragonflyExplanation:
I might be super wrong lol take this with a grain of salt eheh
Describe how rodent and human skeleton's are similar in structure and function.
OMG HELP PLS!
Answer: the functions of the skeleton. Structure, protection (ribs), allow movement, chemical/physiological: stores calcium and are made up of the same cell tissue.
Explanation:
Which molecule in the equation represents food energy made by plants? A Carbon dioxide B Water C Glucose D Oxygen This is the last one and i will give free brainly points :DDDDD
Answer:
C
Explanation:
glucose is the product of photosynthesis.
I don’t understand this
PLEASE HELP ASAP!!! I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!
Answer:
This is your mom you need to find your answers with out cheating!!!!!!!!
Explanation:
A change in DNA could alter the amino acid order which will affect the folding of the protein, and therefore it's function. True or false
Answer:
True
Explanation:
A change in DNA can affect amino acid folding order
In an experiment, Dr.Travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. The amount of calcium ____ variable. The risk of bone fractures _________.
1. A reliable
An independent
A dependent
2. Can be changed by the participants
Can be changed by the researcher
Could change with calcium intake
Answer:
Part 1. The amount of calcium is independent variable.
Explanation:
An independent variable is a variable in an experiment which is changed to see its effects on dependent variable.
In this experiment, to know about the causes of osteoporosis, the Ca level in blood or calcium intake in changed.
So the concentration of calcium will be independent variable.
Part 2.
The risk of bone fractures is could be changed with calcium.
Explanation:
In this experiment osteoporosis or risk of bone fracture is dependent variable.
Dependent variable are results of experiment which can be changed by independent variable.
As in experiment, Calcium concentration is independent variable.
So the risk of osteoporosis depends can change with calcium.
Which of the following is false regarding the protein pepsin?
A. Pepsin hydrolyzes peptide bonds.
B. Pepsin is a type of protease.
C. Pepsinogen is the active form of pepsin.
D. Pepsinogen self-cleaves at the pH found in the stomach.
E. None of the above are false.
Answer:
C. Pepsinogen is the active form of pepsin.
Explanation:
Pepsin is a gastric protease belonging to the aspartic proteinase family which breaks down polypeptide chains into smaller peptides by hydrolyzing peptide bonds. Pepsin is found in the gastric juice where it digests proteins from foods together with other digestive enzymes and hydrochloric acid. Moreover, pepsinogen is a precursor of pepsin which is secreted by the gastric chief cells of the human stomach and then is converted into pepsin (its active form) by hydrochloric acid.
When viewing the shape of a human cheek cell, what microscope would most likely be used?
A.) Light
B.) Dissecting
C.) Transmission Electron
D.) Scanning Electron
Answer:
Your answer Is C!!!!! :)))
Explanation:
A light microscope can be used to view the shape of a human cheek cell. So the correct option is A.
What is a light microscope?In many research labs, including those using electron microscopes, light microscopes are crucial tools. They can be used to support electron microscopy or as the main viewing tool. The methods used to prepare samples for light microscopy are constantly expanding, and they might include everything from tissue cultures and sliced biological creatures to samples from the sciences of materials and geology.
There are significant parallels between the optical principles of light and electron microscopes. Understanding the operation of a light microscope is essential for both getting the best possible light pictures and comprehending electron microscopy.
We make use of the waveform characteristics of light in microscopy. When generated at a specific source, these waves vibrate perpendicular to the direction of transmission. There are peaks and troughs on every wave. One wavelength is the length of the light ray's onward journey (lambda). The color and intensity of the source affect the wavelength.
Therefore the correct option is A.
Read more about light microscopes, here
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#SPJ2
Air always moves from pressure to pressure
A.high, low
B. low, low
C.low, high
D.high, high
Answer:
C
Explanation:
Air flowing from areas of high pressure to low pressure creates winds. Warm air can hold more moisture than cold air. Air moving at the bases of the three major convection cells in each hemisphere north and south of the equator creates the global wind belts.
Answer:
A. high, low
Explanation:
I have the correct answer.
Which best describes independent assortment?
In metaphase 1, chromosomes from the mother and father line up on opposite sides of the cell.
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Portions of each chromosome switch sections in the mother’s and father’s chromosomes.
Portions of each chromosome break off and reattach to the original chromosome. ≈∫ plz hurry
Answer:
The second one.
Explanation:
During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
Someone please help me
Answer: I think its C .
Explanation:
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU
Answer:
methane
Explanation:
cows produce alot of it and contribute to pollution.
Using this information and what you learned about mechanisms of gene expression, why do cats have such fur pigmentation
Answer:
Explanation:
Gene expression is when information from a gene is used to product a gene product, this product enables to produce protein as the end product.
Phenotype which is the physical expression of the genetic make up gives the gene expression.
Cat having a fur pigmentation indicates the presence of a functional protein that has fur i.e the genetic make up of the cat has fur which give rise to the phenotypic expression.
Proteins are composed of what smaller subunits?
amino acids
fatty acid
nucleotides
nucleic acids
Answer:amino acids!
Explanation:
TIME
A chemical reaction that has the general formula of nA - (A)n is best classified as a
reaction
Which of these actions a sustainable practice
Answer:
Add more to your question so I can help you
Explanation: