PLEASE ANSWER QUICK, I’LL GIVE BRAINLIEST TO THE CORRECT ONE!
1. What are the independent and dependent variables in each of the experiments?
2. What information should be added to the diagram to give the reader a better understanding of how these experiments
were conducted?
3. What items should have been CONTROLLED in the experiments?
4. How much confidence would you have in the conclusion of experiment 3 if you found out that the temperature was not
controlled? Explain your reasoning.
Answers
experiment 2 : independent is presence or absence of fan, dependent is volume of water lost
experiment 3 : independent is light intensity, dependent is volume of water lost
The independent variables are temperature, airflow, and light intensity and the dependent variable is the volume of water lost.
The initial volume of water should be known.
The initial volume of water should have been controlled.
The results of experiment 3 are not valid if the temperature is not controlled.
What is evaporation?
The surface phenomenon in which a liquid is converted into a vapor is defined as evaporation. The surface phenomenon means that only the exposed layer of the liquid will be affected.
This is different from boiling as boiling is a bulk phenomenon in which the entire volume of the liquid is affected and converted to vapor.
Also, unlike boiling, evaporation can happen at any temperature but it is faster at high temperatures. Evaporation is also affected by the speed of the wind, light intensity, and humidity.
Therefore, in this experiment, where the rate of evaporation in different variables is being measured,
The independent variables are temperature, airflow, and light intensity and the dependent variable is the volume of water lost. The initial volume of water should be known. The initial volume of water should have been controlled. The results of experiment 3 are not valid if the temperature is not controlled.
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Related Questions
What is the mechanism(s) that bordetella pertussis uses to invade epithelial cells in the lungs?
Answers
The mechanism of action of Bordetella pertussis is to stop the cilia of epithelial cells from beating.
Bordetella pertussis is a pathogenic, gram-negative bacteria. It is the causative agent of highly communicable respiratory disease known as pertussis or whooping cough.
The mechanism of action of Bordetella pertussis:
This bacterium colonizes the ciliated epithelial cells of the respiratory airways of the host. A surface protein on the bacteria called filamentous haemagglutinin adhesin binds to sulfatides on the cilia of epithelial cells. When the bacterium is anchored, it releases tracheal cytotoxin, which prevents the cilia from beating.As a result, the cilia in an organism's lungs are unable to sweep out foreign material, and the body reacts by causing the host to cough. When people cough, bacteria are released into the air, where they might spread to other hosts. Another toxin called the pertussis toxin, often known as PTx, prevents adenylate cyclase from using ATP to convert to cyclic AMP. This results in over-conversion of ATP to cyclic AMP, which may interfere with cellular signaling systems. As a result, phagocytes are unable to respond to an infection effectively.Know more about Bordetella pertussis here:
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Earth’s mantle
Select one:
a.
consists of liquid rock.
b.
is hotter than the crust.
c.
is made of granite.
d.
All of these.
Answers
According to the research, Earth's mantle is hotter than the crust.
What is the Earth's mantle?It is the solid layer that lies between the central core of planet Earth and the earth's crust.
Advancing towards the core of the planet, the Earth's mantle is hotter than the crust and is subject to greater pressures, so its physical properties and chemical composition will also vary.
Therefore, we can conclude that according to the research, Earth's mantle is hotter than the crust.
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The morphologic abnormality characteristically found in hemoglobinopathies is: Group of answer choices
Answers
The morphologic abnormality characteristically found in hemoglobinopathies is codocytes.
What is codocytes?
Red blood cells called codocytes, also called target cells, resemble a shooting target with a bullseye.
What codocytes do?The codocyte is a bell-shaped cell that is located in vivo (inside the blood vessel). It only adopts a "target" configuration when a blood film is desired.
How codocytes form?Artifact.Hemoglobinopathies.Artifact: Target cell development happens when blood smears are performed under humid conditions.
Hemoglobinopathies: Increased surface area to volume ratio and unequal hemoglobin dispersion within the cell.
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why is grafting preferred on late April and early may?
Answers
Answer:
Grafting is a technique used to join two pieces of plant material together so that they will grow as one plant. This is often done with fruit trees, where a desired variety of tree is grafted onto the rootstock of a more common variety of tree.
Grafting is typically done in late April or early May because this is when the bark of the trees is slipping, which makes it easier to join the two pieces of plant material together.
Explanation:
Most grafting is done in late winter or early spring before new growth begins. The best time is after the chance of severe cold has passed but well before hot weather arrives. Scion wood may be collected during the winter. Store it in a cold, moist place at temperatures close to 34 degrees Fahrenheit.
how does fish breath?
Answers
Answer:
through the help of gills?
In easy words, they are located on the side of the head of the fish
A population is: individuals of the same species that have the potential to interbreed. a group of individuals of the same species that live in the same general location and have the potential to interbreed. a group of species that share the same habitat. a group of individuals of related species that live in the same general location and have the potential to interbreed. a group of individuals of the same species that are capable of breeding with other related species.
Answers
A population is a group of individuals of the same species that has the potential to interbreed.
A population is described as a collection of people who belong to the same species and cohabit a particular area.A population is a subgroup of individuals belonging to a single species that coexists sexually and occupies a specific geographic area. For certain species, it is simple to determine the geographic limits of a population; for other species, it might be more challenging. For instance, the geographic range of plants or animals living on islands is determined by the island's border. On the other hand, other species are spread over very large areas, making it more challenging to define the borders of small populations.learn more about population here: https://brainly.com/question/1437549
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An ovarian tumor in a 21-year-old woman is genotyped and a gain-of-function mutation is found on the X chromosome that was not present in cells taken from a biopsy of her uterus. She is concerned about her future potential children and asks a genetic counselor what the likelihood is that this mutation will be passed along to her children. What is the correct answer
Answers
Only tumor cells had the mutation, indicating that it was a somatic one. No children of hers will inherit this mutation because somatic mutations cannot be passed on to offspring.
Germ cells are the only cells that are transmitted from parents to children (Egg and sperm).Somatic cells are not inherited. Therefore, there is no way for a somatic cell mutation to be passed on to progeny. If the mutation is in an egg or sperm cell, the kids exactly inherit the mutation. Here, Only tumor cells had the mutation, indicating that it was a somatic one. Thus, No children of hers will inherit this mutation.For single-celled organisms that lack germ or somatic cells, for example, mutations are passed on when a new half of the organism divides to reproduce. Mutations can be conveyed via the plasmids in cells that use them to pass genetic information to other single cells, etc.learn more about somatic mutations here: https://brainly.com/question/14782028
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The mutation was only present in tumor cells, proving that it was a somatic mutation. She will not convey this mutation to any of her children because somatic mutations cannot be passed from parent to child.
What is somatic mutation?Any mutation that happens in a cell other than a gamete, germ cell, or gametocyte is referred to as a somatic mutation because it involves a change in the DNA sequence of a somatic cell of a multicellular organism with dedicated reproductive cells.
The only cells that are passed from parents to children are germ cells (egg and sperm).
It is impossible to inherit somatic cells. Therefore, a somatic cell mutation cannot be passed on to offspring.
When a mutation occurs in an egg or sperm cell, it is completely passed on to the offspring.
Here, the mutation was present only in tumor cells, proving that it was a somatic mutation. None of her offspring will therefore carry this trait.
For example, when a new half of a single-celled organism divides to reproduce, mutations are passed on because these organisms lack germ or somatic cells.
The plasmids that cells utilize to transmit genetic information to other single cells, etc., can also transmit mutations.
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What conclusion can be drawn about the relationship of joseph lister’s and louis pasteur’s work?.
Answers
Lister’s work was only made possible by Louis Pasteur’s discoveries.
Louis Pasteur developed the pasteurization technique, which involves heating liquids and then letting them cool in order to kill bacteria, after learning that microbes were the cause of alcohol that had soured. His research on germ theory also inspired him and his team to develop the anthrax and rabies vaccines.Only Pasteur's discoveries made Lister's research possible. Infection was first thought to be caused by germs according to Pasteur. Lister developed the concepts of sterile surgery based on the "germ theory." Surgery was transformed into a sterile procedure thanks to Lister and Pasteur.learn more about Louis Pasteur here: https://brainly.com/question/11137072
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uman chorionic gonadotropin (HCG) A. is secreted from the corpus luteum B. is secreted from the myometrium in the uterus C. stimulates placental secretion of estrogen and progesterone D. is secreted from the placenta E. none of these
Answers
Human chorionic gonadotropin is secreted from the placenta. The correct option is D.
What is HCG?HCG is known as Human Chorionic Gonadotropin.
It is a hormone secreted by the placenta during pregnancy.
The hormone specifically functions to thicken the wall of the uterus in order to be able to support the growing embryo.
It also signals to the body system to halt the process of menstruation.
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A skier glides down a hill from 100 m height. At what velocity will he pass the 100 m mark?
Answers
The velocity with which the skier passes the 100 m mark is 44.3 m/s
What is the velocity?Velocity is the rate of change of position with time. Now we know that;
v^2 = u^2 + 2gh
But u = 0 m/s because the skier dropped from a height hence we can write;
v = 2gh
Thus;
v^2 = 2 * 9.8 m/s^2 * 100 m
v = √1960 m/s
V = 44.3 m/s
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which brain structure responds to stimuli, conducts electrical impulses, and releases neurotransmitters
Answers
Answer:
Neurons
Explanation:
Please help me I desperately need it
Answers
Answer:
D) Water temperature decreases; copper temperature increases
Explanation:
The temperature is a way of describing how much heat something has. Because the temperatures of the two substances are not the same, the heat is going to want to travel to the substance with less heat. Therefore, since the copper has less heat than the water, the heat will be transferred to the copper. Remember that this heat is now leaving the water. This increases the temperature of the copper and decreases the temperature of the water.
The two DNA strands are held together by ____________ bonding between the bases on the different strands; therefore, all the bases are on the ____________ of the double helix, and the sugar-phosphate backbones are on the ____________ .
Answers
The two DNA strands are held together by hydrogen bonds.
all the bases are on the inside of the double helix.
and the sugar-phosphate backbones are on the outside
Base pair nucleotides are complementary. That is, their shape allows them to connect to each other using hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. Hydrogen bonds between complementary bases hold the two strands of DNA together.
The role of hydrogen bonds, sometimes thought to be important in holding DNA helices together, seems to be related to classifying base pairs to connect in the correct order. This discovery is important for understanding how DNA is related to its environment.
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A $55 pair of shoes was discounted 15 percent, making the sale price $46.75. The discounted price was then discounted again by 10 percent. Explain how you would find the final price of the shoes
Answers
Answer:
$42.08
Explanation:
First equate the discounted(sale price) $46.75 to 100%. If
$46.75=100%,what about 90%since it was discounted by 10%
(90%×46.75)÷100
=$42.08
All of the following statements concerning autoclaving are true EXCEPT: a. Larger volumes require longer autoclaving times. b. Autoclaves are effective at destroying most bacterial endospores. c. All materials that need to be sterilized can be autoclaved. d. At 15 p.s.i., water boils at 121oC.
Answers
c. All materials that need to be sterilized can be autoclaved.
As a widespread rule of thumb, you can not autoclave materials that can be infected with solvents, radioactive materials, risky or corrosive chemicals, or items that contain mutagens, carcinogens, or teratogens.
The catheter is a soft instrument, manufactured from polymers instead of any steel substance. The high warmness and water pressure of the autoclave can cause the polymer to melt or get broken.
Chlorides, sulfates, chlorine, hypochlorites, bleach, and acids aggressively attack chrome steel and might reason great damage to the autoclave chamber and plumbing. Hypochlorites, acids and bleaches are so caustic that they ought to never be sterilized or used to easy an autoclave.
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Consider the debate about whether viruses are alive or not. Both Viewpoint #1 and Viewpoint #2 have points of evidence in common. Evidence includes ALL BUT _____.
Answers
but became hhfgbighhjgttty
Conduction of an action potential along the sarcolemma depends upon ___________.
Answers
According to the research, an action potential along the sarcolemma depends upon diffusion of sodium ions through voltage-gated channels.
What is the sarcolemma?It is the specialized cell membrane that surrounds the cells of striated muscle fibers.
It resembles in many respects the plasma membrane of neuronal cells, the action potential propagates through it, opening voltage-dependent sodium channels and causing the opening of more sodium channels.
Therefore, we can conclude that an action potential along the sarcolemma depends upon diffusion of sodium ions through voltage-gated channels.
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Contained within the genetic material are the instructions for regulating and manufacturing the ____________ that control cellular function, but, it was not until the ____________ that scientists began to perform a series of experiments that ultimately determined the genetic material and the basic structure of the molecule.
Answers
Contained within the genetic material are the instructions for regulating and manufacturing the genes that control cellular function, but, it was not until the DNA that scientists began to perform a series of experiments that ultimately determined the genetic material and the basic structure of the molecule.
What is Genetic Material?A multicellular creature's somatic cells have similar genetic material, which regulates the composition of the organism. Since the genetic material can duplicate alongside the cell, new cells inherit the same genetic makeup as their parent cells.Chromosomes are where the genetic material is found, according to research on the structure and function of the genetic material. It wasn't known early on whether proteins or DNA carried the genetic information because chromosomes include both proteins and DNA. Because proteins lack the most crucial characteristic of genetic material, replication, Hershey and Chase's tests demonstrated that DNA, not proteins, was the genetic material.To learn more about Genetic Materials refer to:
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Can you help me please
Answers
Word and definition
1] Prokaryote = Prokaryotic cell refers to the cell which is unicellular. Prokaryotes are unicellular organisms that consist of a single prokaryotic cell. Prokaryotic cells are simple cells that do not have a true nucleus or other cell organelles.
2] Osteocyte= a cell that is characteristic of adult bone and is isolated in a lacuna of the bone substance
3] Macrophage = Macrophages are white blood cells that engulf and digest pathogens.
4] Microscope= An instrument that gives an enlarged image of an object
5] eukaryote = Eukaryote, any cell or organism that possesses a clearly defined nucleus. The eukaryotic cell has a nuclear membrane that surrounds the nucleus, in which the well-defined chromosomes (bodies containing the hereditary material) are located.
Homologous chromosomes have genes that are located at the same location of the partner chromosomes. Group of answer choices True False
Answers
Answer:True
Explanation:
All of these choices are correct. Therefore, option (D) is correct.
Homologous chromosomes are pairs from each parent. They have the same genes at the same loci on each chromosome, yet they may have distinct alleles. Meiosis, which creates gametes (sperm and eggs) for sexual reproduction, requires these homologous couples.
Crossover of homologous chromosomes during meiosis creates genetic variation in children. Homologous chromosomes guarantee that kids acquire genetic material from both parents, promoting genetic variety and evolution. Therefore, option (D) is correct.
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Your question is incomplete but your full question was:
Which of the following statements about homologous chromosomes is true?
They are matching chromosomes.
They have the same genes located at the same location.
One of each pair comes from each parent.
All of these choices are correct.
Salmon eggs hatch in freshwater streams and, during their first year of life, the young salmon migrate distances up to 1,000 km in order to reach the ocean. Here they spend up to 5 years where they feed and grow, acquiring more than 95% of their biomass. During the summer of their maturing year, they begin the long journey back to their home streams to spawn. Although it is still uncertain how salmon navigate back to their spawning grounds, current hypotheses suggest that they have a highly developed sense of smell that allows them to remember odors they encountered on their migration to the ocean. They then use these odors to help them navigate back to the streams where they were born. At the spawning grounds, females use their tails to form a hollow cavity in the stream gravel where they lay up to 8,000 eggs. The males fertilize the eggs, and both adults typically die soon thereafter. The physiological response that allows salmon to survive in fresh water, then in salt water, and then fresh water again is an example of ________.
Answers
Acclimation is the physiological response or phenomenon which is responsible for survival of salmon in fresh water and salt water.
When a young salmon starts its sea journey it travels wide distances in search for oceans completing a leg of their journey. They travel back to home streams for spawning. This survival in different osmotic potentials and salinity is due to osmoregulation and acclimation. System of salmon detects saline change and instigates a negative feedback system to the body water concentration. Similar feedback works contrastingly when salmon is in fresh water or marine streams of water.
Hence, the physiological response occuring in salmon is acclimation.
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Summary We can see evidence of divergent plate boundaries on some continents. Why was the discovery of divergent plate boundaries on the ocean floor important for the development of plate tectonic theory?
Answers
Divergent plate boundaries are formed due to the movement of the tectonic plates. It justifies the formation of the oceanic floors by the plate tectonic theory.
What is plate tectonic theory?Plate tectonic theory explains the formation of the landforms by the divergent, convergent, and transformation in the plate boundaries.
The divergent plate tectonic movement causes the formation of the basin ranges as the tectonic moves away from each other and supports the formation of the oceans.
Therefore, the plate tectonic theory supports ocean formation by the divergent plate boundaries.
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A(n) __________ disease is one that is caused by a change in the DNA sequence of an individual. If the abnormality occurs within the gametes, the abnormality can be passed on from one generation to the next.
Answers
A genetic disorder disease is one that is caused by a change in the DNA sequence of an individual
What is a genetic disorder?A genetic disorder can simply be defined as a disease which is caused by a change in the DNA sequence of an individual or mutation in an individual's DNA sequence
In conclusion, a genetic disorder disease is one that is caused by a change in the DNA sequence of an individual
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Which of these characteristics apply to viruses? Select all that apply.
Viruses do not require nutrients.
Viruses can replicate outside of a cell.
Viruses are larger than bacteria.
Viruses are made of RNA or DNA.
Viruses have a protein coat.
Answers
The characteristics that apply to viruses are;
Viruses are made of RNA or DNA.Viruses have a protein coatWhat are viruses?Viruses are microscopic non-cellular structure consisting of a core of DNA or RNA (nucleic acid) surrounded by a protein coat (capsid).
A virus is considered as by non-living because it requires a living host cell to replicate, and often causes disease in the host organism.
Therefore, the characteristics that apply to viruses are;
Viruses are made of RNA or DNA.Viruses have a protein coatLearn more about virus at: https://brainly.com/question/1427968
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The fact that rats raised in cages with toys have more dendritic spines and more synapses per neuron than rats raised in cages without this stimulation is an example of
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The fact that rats raised in cages with toys have more dendritic spines and more synapses per neuron than rats raised in cages without this stimulation is an example of: experience-dependent plasticity.
What is experience-dependent plasticity?The ability of the brain to change in response to experience, repeated stimuli, environmental signals, and learning is referred to as experience-dependent neuroplasticity.
The capacity of the brain to change at any time as a result of environment and experience, both throughout development and as an adult. Examples include: -Learning something in class that differs from what a student previously believed the subject to be about. Experience-Dependent Plasticity is the continuing process of the creation and organization of neuron connections that occurs as a result of a person's life experiences.
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In a resting state, sodium (Na ) is at a higher concentration outside the cell and potassium (K ) is more concentrated inside the cell. During an action potential, the sodium levels ________ inside the cell.
Answers
In a resting state, sodium (Na ) is at a higher concentration outside the cell, and potassium (K ) is more concentrated inside the cell. During an action potential, the sodium levels increase inside the cell.
During an action potential, the potassium level inside the cell decreases, and the sodium level inside the cell increases. That is to say, there is an outflow of potassium and an inflow of sodium ions.
Action potential usually occurs when an electrical signal disrupts the balance of Na+ and K+ within a cell membrane, briefly depolarizing the concentrations of each.
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A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory.
Answers
A mutation is an alteration in the original DNA sequence. Option 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
What is a mutation?A mutation is a stable and hereditably change in the genetic material.
Mutations alter DNI sequences and introduce new variants. Many of these variants are eliminated, but some of them might succeed and be incorporated in each individual, affecting the entire species.
They can be damaging or beneficial. These last mutations are the ones that have been selected by natural selection.
Different mutagenic agents cause changes in genetic information, increasing mutations over the normal level. They can change the bases sequences and bases pairing.
Mutations depend on each group's environment and its ecological pressures, and they accumulate in time. They are inherited to the followings generation and get to spread.
According to this framework, the correct option is 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
If the analyzed chemical is a mutagen, then it will cause an alteration in the DNA sequence and this change -mutation- will pass to the following generations spreading in the population.
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A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in
the laboratory
Which statement best provides evidence that the substance is a mutagen?
The cells die within hours of being exposed to the chemical.The cells grow more quickly than those that were not exposed to the chemical.The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.The cells continue to divide at the same rate as before they were exposed to the chemical.The results of gel electrophoresis are shown below with four different strand of dna labeled which strands of dna is the longest
Answers
Answer: 1
Explanation:
Number 1 strand of DNA is the longest. Therefore, the correct option is option A among all the given options.
What is gel electrophoresis?Any of the various methods for separating DNA, RNA, and protein molecules according to their size and electric charge is known as gel electrophoresis. There are several uses for gel electrophoresis, including DNA fingerprinting, the identification of genetic variations and proteins related to health and illness, as well as the identification and purification of proteins and nucleic acids for scientific purposes.
Pathogens that could be present in blood, other tissues, or sources like food can also be found using this technique. In many cases, DNA sequencing and mass spectrometry are used to conduct additional research on nucleic proteins or amino acids that have been identified and purified using gel electrophoresis. Number 1 strand of DNA is the longest.
Therefore, the correct option is option A.
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Your question is incomplete but most probably your full question was,
Briefly explain the differences among messenger RNA, transfer RNA and ribosomal RNA in terms of the roles they play in transcription and translation and where they are found in the cell
Answers
3 major types of RNA play a role during the journey from DNA to protein. Although the functions of each type of RNA are different, one type of RNA is called messenger RNA or simply mRNA.
mRNA is created when the DNA recipe is copied in the first step of the central dogma. The information found in mRNA can be interpreted by using two other forms of RNA in the second step of the central dogma. mRNA is translated into protein at a cellular structure known as the ribosome.
The second type of RNA helps form the structure of a ribosome, this type of RNA is called ribosomal RNA or rRNA. Remember that DNA, and RNA differ slightly at the nucleotide level.
Therefore , the process of transcribing DNA into RNA not only changes the information from a double-stranded into a single-stranded molecule but also changes all the thymine bases into uracil ones. Proteins are made of amino acids, so the formation of any protein requires the assembly of a chain of amino acids.
Transfer RNA or tRNA, molecules ferry amino acids to the ribosome for this assembly.
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3. The sun's energy, which supports life, is transmitted to Earth in the form of
Answers
Answer:
The correct answer is electromatic waves
Explanation: