When attempting to locate something under the microscope, the objective lens that should be started with is 4X.
Objective lens are the one that are placed closest to the specimen when observing under the microscope. Their function is to gather light from the specimen and focus it towards a different type of lens called the ocular lens.
4X is the lowest magnification of the objective lenses. However, they have a larger field of view and therefore more of the specimen can be observed at once that allows the observer to locate the exact target. Due to poor magnification, the target may not be clearly visible, however it can be later watched in higher magnification.
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when an ion channel opens in a sarcolemma, ions flow across the membrane, altering the potential. these cells are said to be . the pump mechanism that maintains the resting membrane potential is an example of . a cell membrane is when there is a higher concentration of cations on one side and a higher concentration of on the other. the difference in charge created by the ecf ions and the icf ions is called the . membrane potential is measured in
Ions are compelled to migrate passively in one direction by the potential gradient of the membrane potential.
What is the mechanism of membrane potential?
Positive ions are drawn to the negative side of the membrane, while negative ions are drawn to the positive side, creating a potential gradient known as membrane potential that compels ions to passively migrate in one way.
When an ion channel opens in a sarcolemma, ions flow across the membrane, altering the potential. these cells are said to be Electrically excitablethe pump mechanism that maintains the resting membrane potential is an example of Active transportWhen there are more cations on one side of the cell membrane and more anions on the other, the membrane is polarized. Typically, the outside of a neuron has a higher concentration of cations than the inner does, and vice versa.The difference in charge created by the ECF ions and the ICF ions is called the membrane potentialmembrane potential is measured in microvolts.Hence, membrane potential is a voltage or electrical charge across the plasma membrane
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How can you use the different states of matter to your advantage when designing a device that lifts a car? What different solids, liquids,and gas might you use in your design?
Answer:
Explanation:
the key difference between solids, liquids, and gas is that solids have a definite shape, liquids have a definite volume but no fixed shape, and gases have neither a definite shape nor volume. Article Sources Author
Anything that has mass is made up of matter – an all-encompassing word for atoms and molecules that make up our physical world. We describe this matter as existing in states (sometimes referred to as phases). Most people are familiar with three states of matter – solids, liquids and gases – but there are two more that are less commonly known but just as important – plasmas and Bose-Einstein condensates.
Bose-Einstein condensate (BEC)
To understand a Bose-Einstein condensate (BEC), you must first know a bit about temperature.
There is a temperature at which molecular motion (therefore everything) stops, this is called absolute zero (0K or around -273°C). Just a fraction above this temperature – and only for some elements – a BEC occurs. The atoms start behaving like little waves and start overlapping one another until they eventually act like one wave and essentially become a superatom. They are not bonded or mixed – they have become indistinguishable from one another, having the same qualities and existing in the same place.
Daniel Kleppner from the Massachusetts Institute of Technology has a great description. He says the “particles have lost their identity – they all think they are everywhere”. One atom can’t tell itself from another.
Changing states
It is important to understand that matter exists in all states and that matter can also change states. It does this by either using or releasing energy, and it is usually associated with changes in temperature and pressure.
A simple example is water. If you have a block of ice, you have solid water. Add heat (a form of energy) and the ice melts into liquid water that you could drink (it has reached its melting point). Continue to apply heat, and the water will evaporate and turn into steam, which is water in a gaseous state (it has reached boiling point). This works backwards, too. Gas can cool down (by losing energy) and condense back into liquid water and cool down further into a solid. There is even a process called sublimation where a solid can turn straight into a gas when heat is applied.
Gas can also change state to a plasma or BEC:
In plasma TVs, little pockets of gas are excited with electricity disrupting the normal balance of atoms so there are lots of free ions and electrons, turning them into plasma, which creates a light.
If you super cool gas, you get a BEC superatom wave. Warm it up, and the wave will return to a gas.
would a chimeric translation system with e coli ribosome small subunit and yeast ribosome large subunit be able to function for protein synthesis? why or why not?
Most ribosomal protein (r-protein) synthesis in Escherichia coli is coordinated with rRNA synthesis via a translational feedback mechanism: when r-protein levels exceed rRNA levels, particular r-proteins bind to their own mRNAs and prevent operon expression.
How does translation bring the ribosome's large and small subunits together?Ribosomal subunits form a sandwich-like structure on the strand of mRNA during translation, where they then draw in tRNA molecules bound to amino acids. The ribosome converts the decoded mRNA sequence into a polypeptide, or new protein, which is composed of a lengthy chain of amino acids.
Which protein in E. coli triggers transcription?More than a hundred genes in Escherichia coli are controlled by the flexible transcriptional regulator known as the cAMP receptor protein, also referred to as the catabolite activator protein.
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the cells that attack damaged arteries causing inflammation and decreased blood flow are? group of answer choices beta cells chief cells parietal cells foam cells
The correct answer is option D.
The cells that attack damaged arteries causing inflammation and decreased blood flow are foam cells.
What are foam cells?
In general, foam cells are also known as macrophages or fatty streaks.
These cells consists of lipids that are eaten by macrophages or white blood cells.
When an invader enters into body, macrophages surround them and engulf them. In this way, these cells are consuming cholesterol which accumulates over time and block the arteries.
to put it simply, foam cells are fluffy macrophages filled with cholesterol. These cells create hindrance in blood flow and cause inflammation in arteries.
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in the control sample histogram, does the population of cells in the s phase show a distinct peak? why or why not?
No, As the S phase develops, the amount of DNA in each cell varies, giving the S phase cells a variety.
What about histogram?A histogram is a graphic representation of data that uses bars of various heights.A histogram's bars divide numbers into ranges.More data falls inside that range, as shown by taller bars.The form and distribution of continuous sample data are shown in a histogram. It is used to display summaries of discrete or continuous data that have been interval-scaled. It is frequently used to conveniently depict the main characteristics of the data distribution. While bar charts show categorical variables, histograms show quantitative or numerical data. The majority of the time, a histogram's numerical data will be continuous (having infinite values).It would be impossible to show every potential value of a continuous variable along an axis. A collection of rectangles with bases and the spaces between class boundaries can be referred to as a histogram. Each rectangular bar represents some type of data, and every rectangle is next to another. Rectangle heights are inversely correlated with matching frequencies for both similar and dissimilar groups. Large amounts of data as well as the frequency of the data values can be seen in histograms. A histogram can be used to find the data's median and distribution. It might also highlight any anomalies.Learn more about histogram here:
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- 5. Which of the following would ecologists NOT study?
A. how beavers get food.
B. how much water is needed for a corn crop.
C. how plastic expands when it is heated.
D. how rabbits escape from predators.
Answer:
I think C is correct
Explanation:
I am not really sure
What steps does the cell take to speed up the rate of DNA replication?
1. based on what you know about the abiotic factors most strongly influencing the marine realm, why is the process of ocean upwelling shown above so important for marine ecosystems?
Coastal upwelling promotes the growth of plankton and seaweed because the deep water pushed to the top is frequently nutrient-rich. Fish, marine animals, and birds can then eat these, in turn. Some of the world's most fertile ecosystems are produced by upwelling.
The kinds of flora and animal species that can survive in an aquatic environment are determined by a number of abiotic conditions. The amount of sunshine, the temperature, the depth of the water, and the chemical makeup of the water all have a significant impact on aquatic ecosystems, whether they are freshwater or saltwater.Oceanic mass movements known as upwelling and downwelling have an impact on both surface and deep currents. The water must be stirred, oxygen must be sent to the deep ocean, heat must be distributed, and nutrients must be brought to the surface.To know more about marine animals
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the bicuspid (mitral) valve question 6 options: is the location of the pacemaker cells of a normal heart. prevents blood flow from the right ventricle to the right atrium. prevents blood flow from the left ventricle to the left atrium. prevents blood flow from the pulmonary artery to the right ventricle. prevents blood flow from the aorta to the left ventricle.
One of the four heart valves is the mitral valve, commonly referred to as the bicuspid valve or the left atrioventricular valve. It is located between the left atrium and the left ventricle of the heart and has two cusps or flaps.
An aortic valve that has two cusps (or flaps) as opposed to three is referred to as bicuspid. The primary artery supplying blood to your body, the aorta, is controlled by the aortic valve, which regulates blood flow from the left ventricle (chamber).
Divides the bottom left chamber from the left atrium, which is the upper left chamber (left ventricle). permits blood to move from the left atrium to the left ventricle through opening. prevents blood from returning to the left atrium from the left ventricle.
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protozoal (parasitic) infection associated with aids that may cause pneumonitis, hepatitis, and encephalitis: a.kaposi sarcoma b.toxoplasmosis c.pneumocystis jiroveci (formerly carinii) pneumonia d.cryptococcus e.herpes simplex
protozoal (parasitic) infection associated with aids that may cause pneumonitis, hepatitis, and encephalitis: b.toxoplasmosis
What causes pneumonia most frequently in AIDS patients?One of the most frequent and potentially fatal causes of pneumonia in patients with HIV is an infection with the bacterium Streptococcus pneumoniae, often known as Pneumococcus. For protection against Streptococcus pneumoniae infection, people with HIV should receive a vaccination.
Immune system dysfunction is the primary cause of fungus infection (either local immunity over the skin or mucous membranes or systemic immunity as seen in the case of certain conditions such as diabetes ).
The most frequent cause of encephalitis is the herpes simplex virus, which also causes cold sores, varicella zoster virus, which causes chickenpox and shingles, measles, mumps, and rubella viruses, and encephalitis.
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Which type of rock made from heat and pressure is primarily classified by texture and composition?
Responses:
A)sedimentary
B)igneous
C)organic
D)metamorphic
Answer: Metamorphic
Explanation:
Answer:
metamorphic
Explanation:
it was correct on test
Which term applies to an individual who possesses two recessive alleles for the same trait? Choose the correct answer.
mutated
O haploid for the trait
O homozygous for the trait
heterozygous for the trait
The term applies to an individual who possesses two recessive alleles for the same trait and is homozygous for the trait. Option B.
The genotype is formed by the combination of alleles that an organism has. If the paired alleles are the same, the organism's genotype is said to be homozygous for that trait, and if they differ the organism's genotype is said to be heterozygous. Homozygosity also refers to a genotype consisting of two identical alleles of a gene for a particular trait. An individual can be homozygous dominant or homozygous recessive.
In complete dominance, only one allele of the genotype is present in the phenotype. In codominant cases, both alleles of a genotype are present in the phenotype. In the case of imperfect dominance, the phenotype shows a mixture of genotypic alleles. Homozygous and heterozygous are terms used to describe a pair of alleles. Individuals who have two identical alleles are said to be homozygous. Individual organisms with different alleles are said to be heterozygous.
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Which phrase best describes the purpose of mitosis?
an organism's genomic dna is analyzed and found to contain 22% thymine. what percentage of that organism's dna is guanine? group of answer choices 22% 56% 28%
The organism has 28% Guanine In its DNA.
In DNA the amount of thymine = amount of adenine
Thus A + T = 22% +22% = 44%
Rest of the DNA is made of Guanine and Cytosine
Thus G + T = 100 + 44 = 56 %
Since amount of Guanine = amount of Cytosine
Thus amount of Guanine = 56 % / 2 = 28%.
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Why is sucrose not a used sugar
what is the effect of mean arterial pressure in the presence of norepinephrine, vasopressin, or angiotensin ii?
Mean arterial pressure (MAP) is the average arterial pressure throughout one cardiac cycle, systole and diastole.
What is Norepinephrine ?Norepinephrine is secreted by adrenal gland. When amount of norepinephrine is increased MAP also increases. When amount of norepinephrine is decreased MAP also decreases.
Vasopressin is secreted by the posterior pituitary gland. It is released when arterial pressure decreases and there is reduction in cardiac volume. It increases systemic vascular resistance and MAP and reduces heart rate and mean pulmonary arterial pressure in patients.
Angiotensin II is secreted by adrenal gland. Receptor of angiotensin ii helps in increasing MAP which is very important in regulating MAP after birth
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Alicia conducted an experiment to find out which insulating material holds in the most heat. She did multiple trials of each test and recorded observations of each trial.
Why did Alicia most likely do more than one trial? Check all that apply.
to increase the reliability of her data
to provide a better understanding of the concepts she investigated
to prevent other people from using the data incorrectly
to help in arriving at a conclusion even with inaccurate data
to reduce the likelihood of errors in the experiment
To lessen the chance that the experiment may make mistakes in the insulating material experiment.
Although more costly, aerogel is unquestionably the greatest insulating material. Fiberglass is inexpensive but needs to be handled carefullyin the experiment. Although useful, mineral wool is not fire resistant material. Efficacious, eco-friendly, and fire-resistant cellulose is difficult to apply. Wool, especially Icelandic wool, is warmer than polyester and cotton according to science. The greatest sportswear for keeping warm when training in the cold is spandex, followed closely by gore-tex. The best fabric for keeping you warm is a wool-acrylic combination, followed by cotton-acrylic. Due to the experiment may make mistakes great thermal resistance as one of the insulation materials, urethane foam is frequently used in home building. It can be produced as a spraying or in other forms.
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23) The limit of change resulted from the regeneration process is very clear in …..
Crabs
Planaria
Humans
Frogs
The limit of change resulted from the regeneration process is very clear in option B: Planaria
Has Planaria the ability to regenerate?Most fishes and salamanders have limited limb regeneration, while larval frogs and toads have tail regeneration (but not adults). After being amputated, a salamander's or a triton's entire limb will continue to develop.
Therefore, Planarians are flatworms (phylum Platyhelminthes) that live in freshwater bodies, and their capacity for regeneration has long been known (Pallas, 1766; Dalyell, 1814). In a procedure that takes days to weeks, planarians can regenerate new heads, tails, sides, or even complete organisms from tiny body parts.
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How is it possible for cancer to spread from one location to another? In this case,
the cancer spread from the breast tissue to the lymph nodes.
Answer:
Cancer cells break away from where they first formed, travel through the blood or lymph system, and form new tumors in other parts of the body. This process is called Metastasis
Explanation:
hope this helps
Oxygen is important in the oxidation of glucose because it ____________________________.
Answer:
Oxygen is important in the oxidation of glucose because it is highly electronegative.
Explanation:
some flagellated species fail to produce flagella when grown under labortory conditions. what might be the disncetive
Bacteria will not move if they do not have to in order to collect nutrients because they are in favourable conditions, therefore even though the can contains these bacteria, they would not produce flagella.
When favourable circumstances are present, organisms have a tendency to preserve energy and refocus it on reproduction rather than on activities that are no longer necessary given the circumstances. The same holds true for bacteria growing in culture because food is easily available and bacteria no longer need to develop flagella in order to move in order to capture it thus they try to conserve their energy and refocus it on reproduction.
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The ______ of a synovial joint encloses the joint and prevents bone ends from being pulled apart.
The Joint capsule of a synovial joint encloses the joint and prevents bone ends from being pulled apart.
The joints of the limbs and other bones that rub up against one another are examples of synovial joints (e.g. shoulder, hip, elbow and knee). It has a fluid-filled joint cavity as a defining characteristic.
The ends of the bones are covered in slick cartilage in a synovial joint. A synovial membrane-lined joint capsule that produces synovial fluid surrounds and protects the two of them. The fluid, muscles, and connective tissues are shielded by the capsule.
The synovial joint's interior is enclosed by the joint capsule, which resembles a sac-like membrane. The bone ends of each involved bone have specific attachment zones where the joint capsule, which is a dense fibrous connective tissue, is attached.
Hence when the bone is pulled apart this joint capsule protects the joint.
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small seed that are covered in a biodegradable coating to make seed larger (easier to sow) are called .
Small seed that are covered in a biodegradable coating to make seed larger or easier to sow is called seed pelleting.
Seed pelleting is applying thin layer of filler materials that is biodegradable in nature, on seed surface that increases their weight and changes shape and size of seed. It is done to improve establishment process. Mostly, seed pelleting is done to make small, fine, light and odd shaped seeds into bold, heavy, round and uniform so they can be planted in easy way.
What is meant by term biodegradable?
The term biodegradable is defined as ability of any material to get decomposed by action of microorganism with the help of abiotic factors in an ecosystem. Process of decomposing biodegradable waste is natural and may take time. Example includes food materials, kitchen wastes, paper, manure etc.
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which of the following courses would be most closely related to a career as a rangeland management specialist? diversity of life diversity of life exotic species exotic species overhunting and its effects on the ecosystem overhunting and its effects on the ecosystem land restoration management
The following courses would be most closely related to a career as a rangeland management specialist in land restoration management. Option D.
Land remediation may include the process of cleaning and remediation of sites suffering from ongoing environmental degradation. B. Caused by natural causes and human activities to restore the area to its natural state as a habitat for wildlife and balanced habitats.
Land restoration is the ecological process of restoring natural and safe landscapes for humans wildlife and plant communities. This process paves the way for protecting ecosystems generating economic development preventing natural disasters such as floods and increasing soil productivity and food supply. The aim is to identify land-use combinations that can best meet stakeholder needs while securing future resources in a given landscape.
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why are humans less genetically variable than other organisms despite the fact that we range all over the world?
The human species has experienced a quick increase in size which leads to less genetic variability in humans as compared to another organism.
Native populations' genetic variety declines when they migrate further away from Africa, and bottlenecks during migration, which are situations where population size is momentarily reduced, are assumed to be the cause of this.
Evolutionary geneticists have now demonstrated that during two severe bottlenecks that occurred between 60,000 and 50,000 years ago as modern humans left Africa, a significant portion of our ancestors' genetic variation was lost.
The presence of more than two homologous chromosomes, polyploidy, population migration, homologous recombination or crossing over during meiosis, and mutations are a few potential causes of genetic variability in the population.
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5. At one time, interphase was referred to as the
resting phase of the cell cycle. Why do you think
this description is no longer used?
Answer:
ddddddddddddddddddddddddddddddddd
Explanation:
Compared to human cells, there are about _______ bacterial and archaeal cells inhabiting our bodies.
Answer:
Compared to human cells, there are about _ 10 to 100 times as many______ bacterial and archaeal cells inhabiting our bodies.
Explanation:
Hope this helps! Have a nice day^^
Brainliest Pleaz :)
in the mystery urinalysis lab, which suspect's microscopic evaluation indicated calcium oxalate crystals?
In the mystery urinalysis lab, Brad suspect's microscopic evaluation indicated calcium oxalate crystals.
What do you mean by urinalysis?A urine test is known as a urinalysis. It is used to identify and treat a variety of illnesses, including diabetes, renal disease, and urogenital infections. A urinalysis involves examining the color, consistency, and composition of urine.
What is microscopic evaluation?The first identification of herbs, the identification of minute fragments of crude or powdered herbs, the detection of adulterants (such as insects, animal feces, mold, fungi, etc.), and the identification of the plant by distinctive tissue features all require microscopic analysis. Every plant has a unique tissue structure, which can be seen by examining how the tissues are arranged and how the cell walls and configuration are when the plant is appropriately mounted in stains, reagents, and media. With a drop of phloroglucinol and strong hydrochloric acid, lignin stains crimson or pink. Starch and hemicellulose are dyed blue by N/50 iodine solution, while mucilage is stained pink by ruthenium red. In-depth research has been done on the distinguishing characteristics of cell walls, cell contents, starch grains, calcium oxalate crystals, trichomes, fibers, vessels, etc.
Thus from above conclusion we can say that in the mystery urinalysis lab, Brad suspect's microscopic evaluation indicated calcium oxalate crystals.
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a trna molecule with anticodon cag carries the amino acid phenylalanine. which codon of mrna will the trna join?
Using theories of codon, we got UUU,UUC a trna molecule with anticodn cag which carries the amino acid phenylalanine and is a codon of mrna which join the trna.
A codon is a DNA or RNA sequence of the three nucleotides (a trinucleotide) that forms a unit of the genetic information encoding a particular amino acid. An anticodon is the trinucleotide sequence located at one end of a transfer RNA (tRNA) molecule, which is actually complementary to a corresponding codon in the messenger RNA (mRNA) sequence. Each time an amino acid is actually added to a growing polypeptide during the protein synthesis, a tRNA anticodon pairs with its complementary codon on mRNA molecule, ensuring that the appropriate amino acid is inserted into polypeptide.
Hence, a trna molecule with anticodon cag carries the amino acid phenylalanine. UUU,UUC codon of mrna will the trna join.
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Explore It! Question #4: Look around you. Describe how you could use an
object in the room to simulate the motion of this type of wave.
Your answer
Answer:
A longitudinal wave can be created in a slinky if the slinky is stretched out in a horizontal direction and the first coils of the slinky are vibrated horizontally. In such a case, each individual coil of the medium is set into vibrational motion in directions parallel to the direction that the energy is transported.
Explanation:
