Epigenetic regulation mechanism and Repressors and transcriptional activators allows eukaryotic organisms is to regulate genes.
Explanation:
The gene expression regulation process in eukaryotic cell is complicated than when compared to the gene expression regulation process. In the organisms like multicellular, the regulation of gene expression obtained by the proteins. The regulation of genes in this type of organisms doe not take single level of execution.
Before the transcription stage begins, the DNA access is initially regulated. This process of regulation is termed as epigenetic regulation. There are 20,000 genes that are encoded by the genomes in human beings. These are arranged in such a way that they will be used by the particular type of cells when there is any need.
Identify the base in this acid-base reaction
2HC H202 + Mg(OH)2 → Mg(CH302)2 +2120
HC2H302
Mg(OH)2
Mg(C2H302)2
Answer:
[tex]Mg(OH)_2[/tex] is the base in the reaction.
Explanation:
[tex]Mg(OH)_2[/tex] which is Magnesium hydroxide is a base because of the presence of Hydroxide ion. The pH of this magnesium hydroxide is 10 approximately. It is a strong electrolyte and has less solubility. Because of less solubility it becomes a weak base. This magnesium hydroxide is called as Milk of magnesia.
Acetic Acid + Magnesium Hydroxide = Magnesium Acetate + Water
[tex]2HC_2H_3O_2 + Mg(OH)_2 = Mg(C_2H_3O_2)_2 + 2H_2O[/tex]
This is double displacement acid base reaction. Thus the reactant side must have an acid and an base. We could see that acetic acid is present hence Magnesium hydroxide must be the base involved in the reaction
Answer:B mg(oh)2
Explanation:
tissue structure experiment please.
Answer:
Histology is the branch of biology which is related to the study of tissues.
The following are the general steps which are to be taken to examine a tissue under a microscope.
Fixation:Fixation protects the tissue from autolysis. It hardens the tissue due to which it becomes easier in cutting the thin sections of a tissue. Fixation is done with the help of chemicals like aldehydes.
Selection:Selection is done to isolate the particular tissue which we want to observe.
WaxingParaffin waxing is done so that the tissue remains embedded.
Staining:Staining is done so that the tissue can be seen and separated from other tissues.
MicroscopeThe tissue can then be observed under a microscope.
Do my eyes have a faint fold?
Do the shortest duration of insolation and the minimum temperature occur in the same month?
Answer:
Yes, the shortest duration of insolation and the minimum temperature occur in the same month.
Explanation:
The shortest duration of insolation occurs in month of December and sometime the minimum temperature may also occur in the month. The shortest day of the year is December 21 and insolation at that day is also shortest of the year. If the sun is out for a longer time the temperature will be much greater, because the sun is shining for a greater amount of time.How to make the Punnett square
Answer:
Genotype Phenotype
TT - 1/4 homozygous tall tree- 1/4
Tt- 2/4 heterozygous tall tree-2/4
tt-1/4 homozygous short tree-1/4
what is the evalution of managment
Answer:
Evolution of management is the concept that was developed in the early days of men when the realization was made that we must live in groups for the survival.
Explanation:
Since men saw and realized that they need to live in groups, mighty men in the past were able to organize the masses, share them into various groups. The sharing was done accord to the masses' strength, mental capacities and intelligence.The evolution of management section is mainly divided into four sections: Early Management ThoughtThe Scientific Management EraThe Social Person EraThe Modern Era
What would most likely be included in the "Analysis" section of a lab report?
Complete Question:
What would most likely be included in the “Analysis” section of a lab report?
1) a discussion of any errors in the experimental data
2) a list the supplies that were used in conducting the experiment
3) suggestions for new experiments based on the results
4) a description of what the dependent and independent variables were
Answer:
1). a discussion of any errors in the experimental data.
In the analysis section of the lab report, after analyzing and investigating the data, errors are identified in the experimental data. Furthermore, discussion carried out to point out those error occurred in the data. In an analysis process discussion is carried out to find the errors in the whole process. In this process all facts and figure are gather to inquire if there are any errors or mistake present in the final values or final result. Analysis section in a lab report has a key role because it make sure that the final result is error free.
how does nitrogen leave a food chain?
A. Primary consumers eat nitrogen-containing green plants.
B. Producers absorb nitrogen-containing nutrients by their roots.
C. Decomposers break down nitrogen-containing waste material from primary consumers.
D. Denitrifying bacteria convert nitrogen-containing nutrients in the soil into atmospheric nitrogen.
Answer: c
Explanation: Plants and animals need nitrogen to make proteins but they cannot take it in from the air. Because nitrogen is unreactive as a gas, it has to be transformed into a new molecule. When bacteria in the soil takes nitrogen from the air, it becomes nitrates. Finally, it can move through the food chain in this form.
How do viruses replicate?
Answer:
When a virus get access into an accommodating host body , it infuses its genes into the host's cell and uses this medium to replicate itself in a large number
Explanation:
In nature, a virus can't replicate itself it replicate only with the help of the host cell.
Explanation:
The replication of the virus comprises six steps they are attachment, penetration, uncoating, replication, assembly, and release. Due to the absence of the reproductive organelles, the virus replicates only with the help of the host cell. They use the organelles of the host cell to replicate and injects its genetic material into a cell during attachment and penetration. After uncoating replication occurs. During the replication of the virus in a host cell, it produces a protein called the capsid. The total replicate cycle of a virus along with the host is called the lysogenic cycle.The photograph Depicts a condition called syndactyly. Explain what might have happened during development to result in this condition
Answer:
Cells in between the toes did not undergo apoptosis during the development of the fetus resulting in webbed toes.
Explanation:
Determining risk of possible genetic defects can occur before or after conception and includes all of the following approaches EXCEPT:
Group of answer choices
linkage analysis.
Amniocentesis.
karyotype analysis.
pedigree analysis.
chorionic villi sampling.
Answer:
Linkage analysis
Explanation:
Linkage analysis is the only example here that does not look at possible genetic risks, such as looking for abnormal chromosome structures (karyotype) or family history (pedigree analysis).
Instead, linkage analysis is used to narrow down the chromosomal location of a particular trait. That is, it is a method used to find segments of chromosomes that harbour a particular trait.
A scientist wants to observe the structure that joins a cell to neighboring
cells. How should the scientist observe the detailed structure of the cell?
) A. The scientist should prepare a culture of the cell.
O
B. The scientist should prepare a medium for the cell.
O
c. The scientist should use a light microscope.
D. The scientist should use an electron microscope.
Cells are the smallest, functional, and structural living beings. The cell is composed of different organelles and carries out vital functions. If a scientist wants to observe the cellular structure, then they should use a microscope.
The correct answer is:
Option D. The scientist should use an electron microscope.
Cells are microscopic living entities, which can be observed through a microscope. The features of an electron microscope are:
1. Electron Microscope have a much shorter wavelength than visible light, which helps in the better resolution of the specimen.
2. The microscope uses a beam of accelerated electrons to power the source of illumination.
3. Electron microscope is widely used to observe biopsy samples, metals, cells, and macromolecules.
Thus, the electron microscope will be used by the scientist to observe a clear and magnified structure of the cell.
To know more about electron microscopes, refer to the following link:
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Answer:
D:Scientist should use an electronic micromicroscope
Explanation:
Cancer is the product of a mutation that
A) causes the uncontrollable growth of cells
B) changes the structure of hemoglobin in the blood
C) brings out stunted growth and severe pain
D) causes a translocation in a pair of chromosomes
Answer: A) causes the uncontrollable growth of cells
Explanation: Cancer can eventually lead to a tumor which has a large mass
An organism dies, and its body leaves an
impression in mud. Over time, the mud
hardens into rock, and the impression
becomes a fossil. Which kind of fossil was
formed? SC.7.L.15.1
Answer:
sedimentary rock fossil and if am not correct am sorry I tried
Answer:
mold
Explanation:
because it changes over time and formes to a formation of mud
According to the law of conservation of matter, matter is never created or destroyed. Yet in a food pyramid the amount of
biomass decreases as we move up through the pyramid, from producers to top level consumers. Why?
In a food pyramid the amount of biomass decreases as we move up through the pyramid, from producers to top level consumers because, Matter changes to other forms that might not continue to be a part of the same food chain.
Explanation:
It is essential for any living organism to maintain a good health for survival. The good health refer in attaining the necessary nutrients. This can be achieved using the Food pyramid. This helps in getting the nutrients at accurate amount that is helpful in maintaining a good health. There are similar types of nutrients that exists in a food type. These are classified under one group and they form the food pyramid.
Producers are those that have ability to make food for them on their own. For example plants. Plants can get carbon dioxide from atmosphere prepares food for them through photosynthesis process and releases oxygen that helps humans to survive. Consumers are those that depends on something for their food. In a food pyramid, when we move upwards, as the matter changes its forms, which will not sometime become a part of similar food chain, there will be a decrease in the biomass amount.
Winds in our atmosphere are created as a result of which of the following processes?
A. Energy that is absorbed in the atmosphere
B. Gravitational attraction from the moon
C. Density of the air particles in the atmosphere
D. Uneven heating of the air in the atmosphere
Answer:
The correct option is D) Uneven heating of the air in the atmosphere
Explanation:
Wind can simply be described as air which is moving or which is in motion. The uneven heating of the Earth's surface caused by the sun is the reason why winds occur. The difference in pressure of one area to another area causes the air to move and cause wind. The air tends to move from an area of higher pressure to an area of lower pressure and such is the movement of the wind.
Copper exists in nature as two isotopes. The atomic masses and relative abundance of these isotopes is given in the table. What is the average
atomic mass of copper?
Isotope
Cu-63
Cu-65
Relative Abundance(%)
69.17
30.83
Atomic Mass (am)
62.93
64.94
A. 62.93 amu
B. 63 55 amu
C. 63.935 amu
D. 64.94 amu
E. 127.87 amu
The average atomic mass of the copper from the two given copper isotopes is 63.55
Explanation:
The average atomic masses of the isotopes of an element is calculated by the addition of the masses of the two isotopes in proportionality to their percentage of natural occurrence.
Cu-63 relative abundance 69.17 Atomic mass 62.93
Cu-65 relative abundance 30.83 Atomic mass 64.94
Average atomic mass= Cu 63 Atomic mass*relative occurrence percentage+ Cu 65 Atomic mass*relative occurrence percentage
62.93*0.692+64.94*0.308
= 63.546 amu is the average atomic mass of copper.
Questions
The decay of uranium isotopes is used to provide what information about Earth's history?
The decay of uranium isotopes is used to provide information about the age of Earth.
Explanation:Isotopes of Uranium U-232, U-233 , U-234 , U-235 , U-236 , U-238 are used as fuel in nuclear reactors or as explosives for nuclear weapons. Uranium 238 is not very radioactive and it constitutes for nearly 99.3% of natural uranium on Earth and has the longest lifetime: its period is 4.5 billion years, about the age of Earth.
Use of radiometric dating techniques help in defining the age of substances (natural or man-made) using the known decay rates of radioactive elements. Each element has an individual decay rate and half life time.
Two Uranium isotopes (U-238 and U-235) are used for radiometric dating. Both the isotopes have different decay rates and half life period. Both are unstable and radioactive. Since two different isotopes produce two different decay clocks (one as a reference to other), it is beneficial in accurately determining the age of samples. The age of earth (rocks or other natural elements) can be easily determined using Uranium isotopes.
Answer:
yes i know its "the age of the earth" but in the question thing it doesnt have that the closest one i put is age of rocks but im not sure
Explanation:
pls help lol
explain some of the various medieval literary forms. why were writers employing these literary forms?
Answer:
Medieval poetry, medieval drama, medieval allegory, medieval mysticism, medieval travel literature are some forms of medieval literature. The writers employed these forms to expand the boundaries of literature disciplines.
Explanation:
The discipline of literature can be referred to as the most ancient of all knowledge disciplines. It is because the art of literature existed, humans could grow through understanding. The medieval literature was rich in content and spoke mostly about contemporary ideals, values, lifestyles, thoughts, etc.. Why are the effects of acidic deposition often felt in ar-
eas far from where the primary pollutants are produced?
Answer:
Acid desposition is very harmful for the environment because it can easily combine with primary pollutants like carbon monoxide, particulate matter, sulfur oxide etc and form harmful substances.
Explanation:
Acid desposition means acid forming pollutants in the atmosphere that can easily combines with the primary pollutants which is emitted from car and energy power plants.One of the major culprit is sulful dioxide which is released from car. Once they react with water, produce sulfuric acid and nitric acid. Their pH is extremely low thus they acts as acid.These acidic desposition create hazards in aquatic body,wetlands,aquatic fishes,shell fishes,may cause nitrogen pollution and also cause damage in ecosystem.This is the main reason that acidic desposition often felt in area far from pollutants so that it does't hamper the ecosystem.s-waves cannot travel through liquids,including earths?
Answer:
Shear waves cannot travel in liquids or gases -- so, for example, S waves don't travel through the ocean or through the outer core. Surface waves are called surface waves because they are trapped near the Earth's surface, rather than traveling through the ``body'' of the earth like P and S waves.
Structures in plant leaves that open and close to maintain homeostasis are called _____.
flowers
stomata
stems
nodes
Answer:
stomata
Explanation:
Stomata are "pores" located on the underside of leaves to let out water and maintain homeostasis (internal balance) within the plant.
A person who was infected with many common diseases as a child will contain more of which of the following compared to a child who was not exposed to many diseases?
A) Memory cells that provide a specific defense
B) Memory cells that provide a nonspecific defense
C) monocytes that provide a specific defense
D) monocytes that provide a nonspecific defense
Answer:
the answer is C
Explanation:
the answer is C
Answer: monocytes that provide a specific defense
Explanation:
A certain population of bluebirds eats spiders as a major food source. Which of the following ecosystem changes would impact this population of bluebirds the most?
Answer:
Explanation:
Predators
Human activities
Answer:
an increase in the spider and insect populationExplanation:
Empirical evidence is obtained using our human senses, which statement
best explains the importance of empirical evidence in science
A. This type of evidence is impossible to repeat.
o
B. This type of evidence is personal and unsupported,
o
C. This type of evidence can be checked by others,
o o
D. This type of evidence is provided by authorities,
The statement “This type of evidence can be checked by others” best explains the importance of empirical evidence in science.
Explanation:
There are all kinds of evidence used in science, but empirical evidence is obtained as a result of repeated experiments and observations. This evidence is used to either support or argue against a scientific theory. Empirical evidence is the preferred evidence since this kind of evidence can be peer reviewed, i.e. reviewed by other scientists and/or researchers. In other words, the experiment can be redone, and the evidence can be tested.
Which of these is an example of land contamination?
O
A. Desertification
* O
B. Garbage dump
O
C. Recycling bin
O
D. Deforestation
Answer:
B
Explanation:
desertification and deforestation are effect of land contamination and other environmental threats.
this is a recycle bin...and it wont harm anyone...It will recycle the grabage and...help our environment.
Garbage dump will contaminate our water ways with hazardous chemicals...and it will release green house gases like methane....and also when enough methane was produced it can even cause explosions...dont foget the bad odour.
If you find my answer helpful..mark it brainliest..
An example of land contamination is garbage dumps. The correct option is B. Garbage pollutes the land, water, and air.
What is contamination?Contamination is the state or presence of unwanted and undesirable things or elements that pollute, infect, or make dirty a place. Contamination can be of anything, and it affects both the place and the health of the people.
Garbage is the unwanted or filthy elements that have to dispose of carefully, but garbage dumping anywhere contaminates the land, water, and air.
Thus, option B. Garbage dump is correct regarding contamination of land.
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Ari drew a diagram to show organisms in an ecosystem. What did Ari draw?
Answer: food web
Explanation:
Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
What is an Ecosystem?An ecosystem may be defined as a type of place or an area where individuals of different species live together and interact with one another for the purpose of food, shelter, and space along with a mating partner.
According to the context of this question, the food web is the diagram that is drawn by Ari in order to express numerous organisms in an ecosystem.
A food web may be characterized as the interconnection of the number of food chains with each other in order to form a web-like pattern. In this type of arrangement, one organism can hold more than one position.
Therefore, Ari drew a diagram to show organisms in an ecosystem. Due to this, he draws a diagram of the food web.
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need this asap no rocky
Answer:
carp
Explanation:
Explain what happened genetically in the insect population over time as the insects were exposed to pyrethroids.
Answer:
The insects developed pyrethroid resistance.
Explanation:
Pyrethroid Insecticides:
Pyrethroids are synthetic derivatives of the natural compounds, pyrethrins, produced by Chrysanthemum plants to prevent insect attacks.Pyrethrins work by locking sodium channels in the cell membrane. This inhibits nerve impulses and paralyses the insect, ultimately resulting in its death. In the 1940s, synthetic pyrethroid insecticides were first used on auricular crops. But till the 2000s, 100 of insect species were resistant. This occurred due to the fact that the allele for pyrethroid resistance increased throughout the population.Pyrethroid resistance developed to enable the insects to survive. Natural selection allowed an exponential transfer of insecticide resistance genes throughout the insect population.Three major mechanisms of resistance were identified by scientists:Increased expression of genes involved in toxin detoxification.Decrease in sensitivity of the target proteins (on which pyrethrins act).Decrease in the insecticide penetration through the cuticle.Answer:
B) The allele for pyrethroid resistance increased throughout the population.
Explanation:
The allele for pyrethroid resistance increased throughout the population. Variation exists. The allele for resistance remained as those insects not resistant died out. Over time the resistant allele in the populations increased.
An albino woman has 8 children with the same ma. 5 of which are albino. What is the fathers genotype?
Answer:
3 is the father's genotype.
Explanation:
May this answer help you !!!!