The acquired pellicle forms on all of the above mentioned that is on restorations, exposed tooth surfaces dental calculus and dental crowns.
A protein film known as the dental pellicle, also known as an acquired pellicle, develops on the surface of enamel, dentin, artificial crowns, and bridges as a result of the selective binding of salivary glycoproteins that stop the continuous deposition of salivary calcium phosphate. It develops quickly after brushing a tooth or after chewing. After consuming carbs, it shields teeth from the acids that oral microbes produce.
Plaque is a biofilm that forms over the enamel of the pellicle and is made up of numerous types of bacteria and their byproducts. If the plaque is not removed, the surrounding environment will become acidic after several days to weeks of plaque production.
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The most accurate nucleotide base composition of the dna double helix is _____ (t = thymine, a = adenine, c = cytosine, g = guanine) a) a=u b) g=a c) t+g = a+c d) t=c e) t+a=c+g
The most accurate nucleotide base composition of the dna double helix is t+g = a+c (t = thymine, a = adenine, c = cytosine, g = guanine)
According to the Chargaff's rule, DNA from any mobileular of all organisms have pyrimidine and purine bases in 1:1 ratio. Hence, the quantity of guanine is same to cytosine and the quantity of adenine is same to thymine.
This is because, in a dsDNA, adenine pairs with thymine and guanine pairs with cytosine.There are 4 nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T).
These bases shape precise pairs (A with T, and G with C).Watson and Crick advanced their thoughts approximately genetic replication in a 2d article in Nature, posted on May 30, 1953. The had proven that during DNA, shape is function: the double-stranded molecule may want to each produce genuine copies of itself and deliver genetic instructions.
Hence, the correct option is (c)
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you can tell the age of a yeast cell by group of answer choices counting scars seeing whether it will grow on melibiose studying its flocculation total cell count
You can tell the age of a yeast cell by (a) counting scars.
Yeast is a unicellular eukaryotic organism. It belongs to the kingdom Fungi. It is primarily used in baking, cooking and in alcohol industries as well. There are various strains of yeast and the most widely used one is Saccharomyces cerevisiae, also called the baker's or the brewer's yeast.
Scars on the yeast are actually the bud scars formed due to budding. Budding is the process by which the yeast reproduces and gives rise to its offspring. Hence every time a daughter bud pinches off from the yeast cell, a scar is formed.
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the measurement of 17-ketosteroids (17-kss) in urine is performed to assess primarily which organ(s)?
The measurement of 17-ketosteroids (17-kss) in urine is performed to assess primarily the Adrenal Gland.
Adrenal Gland- The suprarenal glands, commonly known as the small, triangular-shaped adrenal glands, are situated on top of both kidneys. Hormones generated by our adrenal glands are responsible for regulating several vital bodily functions, including our immune system, blood pressure, stress response, metabolism, and other vital functions.
Hormones- Hormonal substances serve as messenger molecules in the body. They are produced in one part of the body and then circulate to other parts, where they assist in controlling the activity of cells and organs. For instance, the hormone insulin is produced by pancreatic beta cells.
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Multiple Choice
Which of the following is the term used when pollen from GMO crops fertilizes non-GMO plants?
O gene splicing
O genetic drift
O crossbreeding
O outcrossing
The term used when pollen from GMO crops fertilizes non-GMO plants is: (c) crossbreeding.
GMO crops are the genetically modified crops. These are those plants that get their genetic sequence modified using various techniques so as to bring out the best characteristics and yield from the plant. The modification can be in the form of addition, deletion or exchange of genes. Various crops that have been modified are: soybean, cotton, potato, etc.
Cross-breeding is the mating between two organisms that may be of different species, breed or variety. Since GMO crops and non-GMO crops do not belong to the same variety, they can have cross-breeding between them.
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Conditions in the body's immediate environment
Question 2 options:
Homeostasis
Climate
Electromagnetic Field
Pathogen
Answer:
Climate and Pathogen
Explanation:
Climate and pathogen are conditions in the body's immediate environment
In a forest biome, the trees are a ____________ factor and the rainfall per year is a _______________ factor. independent, dependent biotic, abiotic living, non-living abiotic, biotic
In a forest biome, the trees are a biotic factors. and the rainfall per year is a dependent biotic factor. Biotic elements of a woodland environment consist of all of the dwelling matters gift at the woodland floor, bushes or even human beings. Abiotic elements are sunlight, water, temperature, soil, salinity, etc.Rainfall Erosivity Factor.
The rainfall erosivity factor (R-factor) is primarily based totally on kinetic power concerns of falling rain (Whelan 1980) and represents a degree of the erosive pressure and depth of rain in a ordinary 12 months.
Mean Annual Rainfall approach the common overall quantity of rainfall recorded all through a 12 months in a specific place.Examples of biotic elements consist of plants, animals, fungi, and bacteria.
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A cross between an aabb individual and an aabb individual will produce what type of offspring?.
A cross between an aabb individual and an aabb individual will produce all aabb offspring.
For crossing of aabb with an aabb individual , the homozygous gametes separate from the dihybrid parents . produce ab gametes of each individual which are fused to give heterozygous progeny aabb individual in F1 generation.
Then there is dihybrid cross occur which results in F2 generation with all aabb offspring .
What is crossing ?
Artificial pollination between plants having contrasting genes for a character is known as crossing and product of such cross is known as hybrid F1 generation .
depending upon the genes pairs involved crosses are of the three types they are monohybrid cross , dihybrid cross and poly-hybrid cross .
What is dihybrid cross ?
In such cross two pairs of genes are involved , each affecting a different character e.g., cross between plant having yellow and round seed and green and wrinkled seed .
such a cross gives a phenotypic ratio 9:3:3:1 and a genotypic ratio of 1:2:1:2:4:2:1:2:1 .
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When your muscles contract to move your body, such as during walking, work is done, and work requires energy. Based on the law of conservation of energy, from where does this energy come?.
New energy is created by our cells whenever we need it heat mechanical energy stored in ATP chemical energy.
Adenosine triphosphate (ATP) is the supply of electricity for use and storage at the mobile level. The structure of ATP is a nucleoside triphosphate, consisting of a nitrogenous base (adenine), a ribose sugar, and three serially bonded phosphate groups.
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Match each property of water with the most appropriate biologically
related situation by to its matching property.
Excellent solvent
Cohesive
High specific heat
Ice floats
[Choose ]
[Choose]
[Choose ]
[Choose ]
27
Hydrogen bonds lead water molecules to exhibit intense intermolecular attraction. We refer to this as cohesiveness.
The specific heat of water is high.These two characteristics result from the need for additional energy to break hydrogen bonds. The term "specific heat" refers to the amount of heat that 1 g of a substance must absorb or lose to change its temperature by 1°C. Water has a high specific heat (1 calorie/g/°C). This characteristic guarantees gradual water heating and maintains the environment's and living things' stable temperatures.
When water freezes, its density decreases:At 4°C, water has its highest density. On the other hand, ice is less dense than liquid water and floats on surface water, insulating the underwater film freezing and protecting aquatic life. However, at 4°C, water becomes less dense due to their separation.
The dielectric constant of water is high.This fights against the attraction of ions with opposing charges. As a result, water is an effective solvent for many non-ionizable organic compounds and salts.
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knockout of the circadian clock protein per1 exacerbates hypertension and increases kidney injury in dahl salt-sensitive rats
Knockout of the circadian clock protein per1 exacerbates hypertension and increases kidney injury in dahl salt-sensitive rats resulting in worsening of the SS hypertensive phenotype (1).
A circadian clock factor BMAL1, significantly found in kidneys, is known to affect blood pressure. Moreover, a diet high in salt is associated with immune cell infiltration in the kidney and consequently increases blood pressure. The BMAL1 factor is also responsible for expressing various genes. Mice, when treated with BMAL1 showed aging phenotypes like muscle weakness, changed gait, decreased mobility, inactivity, etc.
PER1 is a circadian clock transcription factor and is regulated by aldosterone. Nice on PER1 knock-out develops reduced sodium excretion with day and night differences. This is done in response to a high-salt diet.
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This type of endocytosis is the cellular process of engulfing liquid particles by the cell membrane.
The type of endocytosis is the cellular process of engulfing liquid particles by the cell membrane is called pinocytosis
Pinocytosis refers to how living cells consume liquid droplets. Pinocytosis is a type of endocytosis, which is the method by which cells envelop external substances and collect them in special membrane-bound vesicles inside the cell. Pinocytosis occurs when a droplet of the liquid becomes bound, or reabsorbed, on the cell membrane. It then invaginates (creates a pocket) and pinches off to create a vesicle in the cytoplasm instead of a single droplet of liquid traveling inactively through the cell membrane.
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describe how you can test for the presence of oxygen in the air
Answer:
Explanation:
Oxygen. Oxygen supports combustion . If oxygen is present in a test tube, a glowing splint relights when it is held inside.
What type of plants contain tubes that help transport water and nutrients into their other parts?
Note: Im in 6th grade
Plants like ferns and conifers have xylem “straws” that are made of slender cells called tracheids. At maturity these cells die, leaving behind a rigid cell wall scaffolding tube to conduct water and minerals.
The biomass pyramids for phytoplankton and trees in their respective environments are _______. a. both inverted b. the same c. opposite d. both normal please select the best answer from the choices provided a b c d
The biomass pyramids for phytoplankton and trees in their respective environments are opposite.
In the field of ecology, a biomass pyramid can be described as a pyramid that represents the biomass i.e the amount of living tissue at each trophic level in an ecosystem.
Usually, the biomass of producers is the greatest in an ecosystem and it decreases while going up at each trophic level. Producers such as trees are usually higher in number and have a larger life span. Hence, their biomass is greater than consumers.
However, the case is the opposite in the case of phytoplanktons. If phytoplanktons are the producers in an ecosystem, then the pyramid of biomass is inverted.
This is because phytoplanktons have a short life span and also are very tiny having little mass. As compared to phytoplanktons, the consumers of such an ecosystem have a greater mass and life span. Hence, the pyramid for trees and phytoplanktons is the opposite.
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due to the of natural resources, we cannot have all the housing and all the forests we may want.
Due to the scarcity of natural resources, we cannot have all the housing and all the forests we may want.
What are the types of natural resources ?The resources which are independent of human action that are found in the environment, such as air, sunlight, water, soil, stone, plants, animals and fossil fuels.
Natural resources contain the materials useful to man and conceivable technological, economic or social circumstances drawn from the earth, food, building and clothing materials, fertilizers, water and geothermal power.
There are two types of natural resources such as Renewable resources are found to be in infinite quantity and used in a repeated manner For Example Forest, wind, water, etc.
Non-Renewable resources that are limited due to their non-renewable nature, for example fossil fuels, minerals, etc.
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In the whole-mantle convection model, what feature balances the deeply descending lithosphere by transporting hot material toward the surface?.
In the whole-mantle convection model, Mantle Plumes balances the deeply descending lithosphere by transporting hot material toward the surface
entire-mantle convection model states that cold, oceanic lithosphere descends into the mantle. warm mantle plumes delivery heat closer to the surface which offers downward arm of convective waftMantle Plumes is hot spots form with the aid of warm, strong fabric growing from narrow jetsconvection occurs when the extra energetic debris flow from the warmer region to the cooler region and take their warmness power with them alternatively a present day due to the rising of heated fluid and sinking of cooled fluid is called Convection modernTo know more about Whole-mantle convection model visit : https://brainly.com/question/28444350
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IS NEEDED ASAP
The human population grows constantly and at an exponential rate. A bigger human population means more humans are having more children, which means the human population grows even bigger.
This is an example of a:
negative feedback loop
positive feedback loop
Answer:
positive
Explanation:
more and more
which of the following is most closely related to the unique density patterns of water described?
Answer: Actually, the exact density of water is not really 1 g/ml, but rather a bit less (very, very little less), at 0.9998395 g/ml at 4.0° Celsius (39.2° Fahrenheit).
Explanation: Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. is a constant, so their respective concentrations are inversely proportional to each other.
Actually, at 4.0 degrees Celsius (39.2 degrees Fahrenheit), water has a density of 0.9998395 g/ml, which is very, very slightly less than 1 g/ml. Its numerous distinctive characteristics.
What is Density patterns?A solid form that is less dense than its liquid form, a comparatively high boiling point of 100 °C for its molar mass, and a high heat capacity, are all brought about by its hydrogen bonding.
The density equation is straightforward: Take the mass of an item with uniformly distributed material.
A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher. The density of a material is a distinguishing quality that is independent of the substance's volume.
Therefore, Actually, at 4.0 degrees Celsius (39.2 degrees Fahrenheit), water has a density of 0.9998395 g/ml, which is very, very slightly less than 1 g/ml. Its numerous distinctive characteristics.
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Explain why it's advantageous to have several different organ systems instead of one large system to handle all of the human body's functions.
Answer:
Explanation:
Just as organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. The respiratory system, and the circulatory system work closely together to deliver oxygen to cells and to get rid of carbon dioxide the cells produce.
describe the formation of platelets from pluripotent stem cells, including the influence of hormones.
The formation of platelets from pluripotent stem cells, including the influence of hormones.
Pluripotent stem cells form are the cells that can form all the cells of the body including ectoderm, mesoderm and endoderm but not the extra-embryonic structures like placenta.
Platelets are formed by a precursor cell called megakaryocyte which are present in the bone marrow. It is actually present in the kidney in the form of myeloid stem cells which forms the megakaryoblast which transforms into megakaryocytes.
Thousands of plateletes are formed by the megakarocytes. Thrombopoietin is the hormone which regulates plateletes formation.
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An increase in the membrane permeability for a solute will result in an increase in the driving force for diffusion of that solute through the membrane. True or false?.
An increase in the membrane permeability for a solute will result in an increase in the driving force for diffusion of that solute through the membrane. This statement is TRUE.
Surface area and porosity/permeability are the two variables that are most relevant to diffusion via a membrane. Slower diffusion will result from a membrane with less permeability or less surface area, which will obstruct molecule motion. More permeable cells can withstand cold and freezing more easily, but they could also become dehydrated. Living cells are suspended in an aqueous solution, and as the cells move through the solution, ice crystals begin to form in the solution around them, increasing the concentration of solutes outside the cells.
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da luz, protásio l., et al. the effect of red wine on experimental atherosclerosis: lipid-independent protection. experimental and molecular pathology 65.3 (1999): 150-159.
To examine the impact of red wine on atherosclerosis, New Zealand rabbits were given a 1% cholesterol weight-reduction plan for 12 weeks and compared to animals that received the weight loss program plus either red wine or nonalcoholic wine merchandise (NAWP). Diet brought about a marked will increase in whole and LDL cholesterol, yet no tremendous modifications in HDL and triglyceride concentrations occurred. In the manage group, plaque vicinity used to be sixty-nine +/- 9% of the aortic surface, whilst in the wine and NAWP agencies, it was only 38 +/- 9 and forty-seven +/- 12%, respectively (P < 0.0001). The average intima/media thickness ratio was once 0.60 +/- 0.2 in manage animals, 0.14 +/- 0.09 in the wine group, and 0.39 +/- 0.19 in the NAWP team (P < 0.0001). No widespread variations have been referred to in LDL oxidizability among treatments. Thus, each red wine and NAWP can prevent plaque formation in hypercholesterolemic rabbits regardless of the extensive will increase in LDL. We speculate that the anti-platelet effect, blockade of expression of endothelial cellphone adhesion molecules, and/or NO stimulation with the aid of red wine flavonoids are possible explanations.
Wine is an alcoholic drink typically made from fermented grapes. Yeast consumes the sugar in the grapes and converts it to ethanol and carbon dioxide, releasing warmth in the process.
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calcium signaling in individual app/ps1 mouse dentate gyrus astrocytes increases ex vivo with aβ pathology and age without affecting astrocyte network activity
Astrocytes are a group of cells with functional characteristics and distinctive morphological that vary within specific areas of the brain.
For healthy brain function, astrocytes are essential. those become reactive in the case of Alzheimer's disease, which impacts the signaling properties. while experimenting, there was the measurement for instinctive calcium transients ex vivo in hippocampal astrocytes in brain slices containing the dentate gyrus of 9-month-old and 6-month-old APPswe/PSEN1dE9 mice. when they investigated the duration of calcium transients and frequency concerning amyloid-β (Aβ) pathology, the proximity of the astrocyte to Aβ plaques, and aging. there was no change in spontaneous calcium-transient properties of 6M APP/PS1 astrocytes compared to wild-type astrocytes, whereas there was hyperactivity in 9M APP/PS1 astrocytes compared to wild -type, which were longer in duration, also there was an effect of aging too, there was an increase in calcium in the 9-month astrocytes than to the 6-month astrocytes, also there was an increase in the calcium waves in the 9-month astrocytes because of the increase network activity. The findings were that the change in calcium signaling in individual astrocytes of APP/PS1 mice is because of both pathology and aging but these don't have any impact on changes in the astrocyte network activity, which leads to helping to understand changes in neuronal physiology.
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circle the bacterial structures that are located on the surface of a bacteria cell: cell wall pilus nucleoid capsule flagella ribosomes
The cell wall, capsule, pilus, and flagella are the bacterial structure that is located on the surface of a bacterial cell.
Cell wall: It is composed of a protein-sugar(polysaccharide) molecule which gives the cell its shape, and rigidity and protects it from the environment.
Capsule: It is a third protective covering that is made up of polysaccharides. It plays many roles but the important ones are to keep the bacterium from drying out and to protect it from engulfing by larger microorganisms.
Pilus: These are specifically small hairlike projections that emerges from the outside of the cell surface. It helps bacteria to attach to the host organism.
Flagella: (singular, flagellum) a hairlike structure that provides a means of location for bacteria. These are mainly found at either or ends of all over its surface.
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When sampling repeatedly from a population, the pattern describing the values a statistic can take and how often it takes those values is the.
The correct answer is option 3) Sampling distribution of the statistic.
The Sampling distribution of the statistics describes the pattern that emerges while repeatedly sampling from a population and describing the possible values and frequency at which those values can be obtained.
Sampling distributions are vital for inferential statistics because they allow comprehending a single sample statistic in the context of other potential values. It outlines a variety of potential possibilities for a statistic, such as the mean or mode of a variable in a population. These distributions explain how a sample statistic fluctuates from one sample to the next.
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When sampling repeatedly from a population, the pattern describing the values a statistic can take and how often it takes those values is the
the bias of the statisticsampling variability of the statisticsampling distribution of the statisticstandard error of the statistic518, 3645–3661. molyneaux, b.j., goff, l.a., brettler, a.c., chen, h.h., hrvatin, s., rinn, j.l., and arlotta, p. (2015). decon: genome-wide analysis of in vivo transcriptional dynamics during
To achieve distinct cellular identities during neuronal development, a complicated dance of transcriptional choices is needed.
A genome-wide investigation of the kinetics of in vivo transcription during the neocortical selection of pyramidal neuronThe immense complexity in time and space during development has made it difficult to achieve the ultimate objective of identifying genome-wide markers that define and drive specific neuronal destinies.In order to clarify lineage choice decisions, we have combined high-throughput purification of pyramidal neuron subclasses with in-depth tracking of spatiotemporal transcriptional dynamics during corticogenesis. We discovered a variety of characteristics, from the use of different mRNA isoforms and promoters in space and time to a large number of mRNA genes that are altered during fate specification. Notably, we found a large number of long non-coding RNAs that expressed only under specified conditions and in certain cell types. We offer an interactive online database that enables multidimensional data processing and dissemination in order to aid future exploration. This comprehensive work creates a valuable resource and advances knowledge of the transcriptional control that underlies pyramidal neuron diversity in the neocortex.learn more about pyramidal neuron here
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the question you are looking for is
DeCoN: genome-wide analysis of in vivo transcriptional dynamics during pyramidal neuron fate selection in neocortex
a procedure that attempts to obstruce the blood flow to a maligant tumor would be in what root operation for icd 10 pcs
According to ICD- 10 PCS root operations that alter the diameter/route of a tubular body part will be used to obstruct the blood flow to a malignant tumor. This is called occlusion.
Occlusion involves completely closing an orifice or the lumen of a tubular body part. It can include intraluminal or extraluminal devices. Here, any division of the body part prior to the procedure is included. For example, Fallopian tube ligation, tying off hemorrhoids, LIGATION of the inferior vena cava.
Malignant tumors have cells that grow uncontrollably and spread locally and/or to distant sites. Malignant tumors are cancerous (ie, they invade other sites). They spread to distant sites via the bloodstream or the lymphatic system. This spread is called metastasis.
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An older patient visits the doctor and learns that they have a disease known as atherosclerosis,
where there is a build-up of fat and cholesterol inside their blood vessels. An illustration of this
condition is shown in the image below.
Which of the following is a result of their condition?
A. increased blood volume
B. decreased blood volume
C. increased blood pressure
D. decreased blood pressure
Question 2(Multiple Choice Worth 4 points)
(01.05 MC)
The Midwest United States is dominated by grasslands and food crops. Which abiotic factors of temperate grasslands create rich
soils for farmland?
Low precipitation and distinct seasons
O Distinct summers and winters; high rainfall.
O Mild winters, high precipitation, and lack of trees
1
High precipitation and little seasonal change
The abiotic factors of temperate grasslands that would create rich soils for farmland are distinct summers and winters; high rainfall. That is option B.
What are abiotic factors in an ecosystem?Abiotic factors are those factors that are found in the environment of an ecosystem which are non living and cam influence the activities of organisms inhabiting that ecosystem.
Examples of abiotic factors that affect the temperate grassland include the following:
wind, soil, rocks,water, sun light, air, wind, temperature, lightning, rain, and climate change.
Soil fertility is enhanced in the presence of rainfall and distinct or controlled seasonal changes.
Therefore, the abiotic factors of temperate grasslands that would create rich
soils for farmland are distinct summers and winters; high rainfall.
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Which of the following agricultural practices decreases biodiversity?
O Tiling soil
O Monoculture
O Synthetic fertilizers
O Flood irrigation