Answer:
Explanation:
A nuclear reactor is an installation capable of initiating, maintaining and controlling the chain fission reactions that take place in the reactor core, consisting of the fuel, coolant, control elements, structural materials and moderator in the case of nuclear thermal reactors.
The core is the part of the reactor where the nuclear chain reaction is produced and maintained.
Components of the core:
The fuel of a nuclear reactor is fissionable material.
Control rod beams provide a rapid means of controlling the nuclear reaction, allowing rapid changes in reactor power and eventual shutdown in case of emergency.
The neutrons produced in fission have a high energy in the form of velocity. Their speed should be reduced to increase the probability of other atoms fissioning and not to stop the chain reaction. This is achieved by elastic collisions of the neutrons with the nuclei of the moderator.
Most of the energy released by fission is in the form of heat. To be able to use this, a refrigerant must pass through the interior of the reactor that absorbs and transports this heat.
In a nuclear chain reaction, a certain number of neutrons tend to escape from the region where it is produced. This neutron leakage can be minimized by the existence of a reflecting medium, thus increasing the efficiency of the reactor.
When the reactor is in operation, a large amount of radiation is generated. Protection is needed to isolate the installation workers from radiation caused by fission products. Therefore, a biological shield is placed around the reactor to intercept these emissions.
A breeder reactor is a nuclear reactor that generates more fissile material in the fuel than it consumes. Considered highly attractive because of their superior fuel economy: a normal reactor consumes less than 1% of the natural uranium that starts the fuel cycle, while a 'breeder' can burn it almost completely. It also generates less waste for the same amounts of energy. Breeders can be designed to use thorium, which is more abundant than uranium. Currently, there is renewed interest in both breeder designs due to the increased price of natural uranium.
All commercial reactors breed fuel, but they have low (though still significant) breeding ratios when compared to machines that are traditionally considered breeders. In recent years, the commercial energy industry has been emphasizing high burn fuels, which last longer in the core of the reactor.
Reproduction of fissile fuel is a common feature in reactors, but commercial reactors are not optimized for this feature which is referred to as improved burning. Up to one-third of all electricity produced in the current U.S. reactor inventory comes from reproducible fuel, and the industry is working hard to increase that percentage over time.
The advantages are:
Generates a large amount of electricity
No production of greenhouse gases
Dependence on oil is reduced
Less damage to the environment
A major disadvantage is the difficult management of the nuclear waste generated.
Nuclear power plants have a limited lifetime. The investment for the construction of a nuclear plant is very high.
structures under flexor retinaculum
Answer:
radial brusa and ulnar brusa
Explanation:
median nerve
Which best describes the outcome of mitosis?
- splits one body cell into two identical body cells
- splits one gamete into two identical body cells
- splits one diploid cell into two genetically unique haploid cells
- fuses two body cells into one diploid cell
Answer:
Mitosis produces genetically identical daughter cells.
Part D
The organism you chose was previously classified by a scientist. What five questions could the scientist ask
that would help classify your organism?
The scientist could ask:
Is it a Mammal?
Is it similar to any other organism?
What type of habitat does it live in?
What are some of it's behavior attributes?
Is it cold blooded or warm blooded?
The scientist could ask five questions in order to classify the organism are
1. what is the meaning of classification
2. what is the need of classification?
3. why we classify organisms?
4. what are the standard criteria for classification?
5. how do we classify organism?
What is organism classification?
A classification system of organism are used by scientists to divide the all the known organisms into groups based observable features.
This system is otherwise known as taxonomy which is subdivided into subgroups like Kingdom, Phylum, Class, Order, Family, Genus, and Species.
Kingdom is based food intake mechanism, Phylum is based on external symmetric appearance.
Class with significant symmetry, order with an unique characteristics, family belongs to the groups which share more similar characteristics.
Genus is generic name of an organism, species is most strict level of classification.
For example Home sapiens, where Homo is genus and sapiens is species.
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what level of organization in protein structure are hydrogen bonds within molecules?
Answer:
Proteins have four levels of organization. Primary structure refers to the linear sequence of the amino acids connected by the peptide bonds. The secondary structure consists of local packing of polypeptide chain into α-helices and β-sheets due to hydrogen bonds between peptide bond – central carbon backbone.
Explanation:
Secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
The secondary structure is the folding that the polypeptide chain adopts thanks to the formation of hydrogen bonds between the atoms that form the peptide bond.
Hydrogen bonds are established between the -CO- and -NH- groups of the peptide bond (the first as an H acceptor, and the second as an H donor).
In this way, the polypeptide chain is capable of adopting lower free energy conformations, and therefore more stable.
Several types of conformations can be distinguished that determine the secondary structure of a protein :
α-helices.β-sheets.
Therefore, we can conclude that secondary structure is the level of organization in protein structure where are hydrogen bonds within molecules.
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Which of the following is NOT an example of metabolism
a.
building up of larger molecules from smaller ones
b.
releasing energy to perform specific body functions
c.
controlling the basic functions and activities of the cell
d.
breaking down of larger molecules or substances into smaller ones
Answer:
c.
Explanation:
A. is a type of metabolism called anabolism
B. is a type of metabolism called catabolism
D. is often the result/purpose of catabolism
C. the basic functions and activities of the cell is considered metabolism.
Which of these tasks would a hydrologist be most likely to perform?
A. Determining the species of a recently collected specimen
B. Estimating the age of recently discovered fossils
C. Estimating the amount of groundwater in an aquifer
D. Determining the best method to extract underground oil
Hydrologists are most likely to perform actions relating to estimating the amount of groundwater in an aquifer.
HydrologistsHydrologists are scientists that specialize in the study of how water relates to the various crusts of the earth.
Hydrology in itself refers to the branch of science that studies how water moves relative to the earth's crusts.
Thus, species identification, age of fossils, or extracting underground oils have nothing to do with the work of hydrologists.
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How does the nervous system help the excretory system maintain homeostasis
Explanation:
The nervous system can detect changes on the salt levels in the blood through urine in the excretory system. The excretory/urinary system help the body maintain homeostasis by filtering waste from blood, getting rid of waste, and regulates fluid levels in the body
What are the major types of ''macromolecules''?
A( Carbohydrates.
B( Chromosomes.
C( Lipids.
D( Lysosomes.
E( Nucleic acids.
F( proteins.
Answer:
carbs, lipids, nuecleic, proteins
Explanation:
Answer:
...
Explanation:
Proteins in the cell membrane that identify the cell are called
A. enzymes
B. transport proteins
C. cell-surface markers
D. receptor proteins
Answer:
Proteins in the cell membrane that identify the cell are called cell-surface markers (option C).
Explanation:
Cell surface markers are integral membrane proteins, whose function is to identify specific cell lines, allowing intercellular recognition and communication.
The specific type of cell marker provides the basis for cell classification, allowing studies to be performed on immune system cells, stem cells or atypical cells such as those found in cancer.
The other options are not correct because:
A. Enzymes are proteins that participate in metabolic reactions.
B. Transport proteins, although they are also part of membrane proteins, perominate the passage of specific substances through the membrane.
D. Receptor proteins allow the identification of specific molecules, such as hormones, to couple with them and promote actions inside the cell.
Proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
Cell surface markers are specific proteins localized on the cell surface or glycoproteins, which can be used as molecular markers that evidence specific cell types/lineages.
For example, cell surface markers can be used for the identification of the lineage and/or phase of differentiation in lymphocytes such as T cells and B cells.
In lymphocytes, the cell surface markers can be divided into three classes: surface immunoglobulins, differentiation antigens, and membrane receptors.
In conclusion, proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
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Some organelles, such as the endoplasmic reticulum and Golgi bodies, have a large and folded structure. What is an advantage of these organelles having a folded structure?
* A. The folding causes the cytoplasm to flow throughout cell and speeds up nutrient transport.
* B.
Protein packaging speeds up with the increased surface area created by the folding.
* C.
The folds trap water, carbohydrates, and proteins until the cell can digest them.
* D.
Nutrients and gases travel along the folds until the cell uses them.
the ability to move things through them
Explanation:
An advantage of the organelles having a folded structure is that protein packaging speeds up with the increased surface area created by the folding. The correct option is B.
What is cell organelle?An organelle is a subcellular structure that, like an organ, has one or more specific jobs to do in the cell.
The nuclei, which store genetic information, mitochondria, which produce chemical energy, and ribosomes, which assemble proteins, are among the more important cell organelles.
They are involved in a variety of processes, including energy production, protein and secretion formation, toxin elimination, and response to external signals.
They increase the surface area of the inner membrane, allowing more proteins and ion exchange across the membrane, allowing the mitochondrion to do its job faster.
The folds within the mitochondria function to increase the surface area of the mitochondrial membrane.
Thus, the correct option is B.
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Wood is a substance that burns in the presence of oxygen. Which best describes this property of wood?
O reactive
O combustible
metallic
O sour
help please i’m in 6th grade
Answer:
C
Explanation:
For example, if we had to control our heart beat the our life would be at risk all the time.
Which of the following best describes an ecosystem in a neighborhood garden?
(A)the tomato plants, the fungi, and the soil
(B)the basil plants
(C)the tomato plants and the fungi
Answer:
Hey bro Ur answer is A)
Explanation:
The definition of an ecosystem is that ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows.
The tomato plants, the fungi, and the soil all interact to sustain each other.
Which stage of the cell cycle is the stage where the nucleus of the cell divides?
Answer:
Mitotic | Anaphase
Explanation:
Discuss how the patient experiencing problems with the cells repairing from the cut and the child's reproduction development malfunctions can alter haploid and diploid cell development.
Answer:
Patients with problems related to cells that repair a cut or malfunctions in the development of the child's reproduction are due to failures in the process of cell division —in somatic cells or gametes— which is mitosis and meiosis.
Explanation:
Mitosis and meiosis are processes of cell division that are necessary for the development of life. Both processes involve obtaining two daughter cells from a progenitor cell, where the genetic information contained in the original cell is transmitted to the cells produced.
Through mitosis, somatic cells —diploids— can multiply, allowing the growth and development of an individual, the repair of damaged tissues and the availability of cells needed by the body, such as blood cells. Meiosis, unlike mitosis, occurs in sex cells, giving rise to gametes. These cells have half of the chromosome load —haploids— and when two of them join, a diploid cell is formed, the zygote.A failure in the process of cell division, whether mitosis or meiosis, can have as consequences:
Mitosis: alterations in the growth and development of a living being, as well as difficulty in regenerating tissues, for example cells that cannot repair a cut. Meiosis: failures in meiotic division can cause chromosomal mutations, which alter the body structure or function determined by the altered chromosome, which results in a child's developmental malfunction.Any alteration in the process of cell division can generate changes or alterations that affect an individual, limiting the functions it can perform.
How have increased carbon dioxide levels and temperatures affected living organisms?
Answer:flowers and other living plants need carbon dioxide but humans need oxygen so human population might decrease of sum like dat
Explanation:
PLEASE HELP
In living substances, the hydrolysis of ATP to ADP and P is virtually the sole supply of energy. However, ATP does not release this energy spontaneously but only in cell machinery where some work is being carried out. In such cases, special enzymes (ATPases) are necessary for the hydrolysis of ATP. How does the universality of ATP and the diversity of enzyme systems relate to the unity and diversity of life through evolution?
Answer
Cells use the hydrolysis of adenosine triphosphate, abbreviated as ATP, as a source of energy. Symbolically, this reaction can be written as
[tex]ATP(aq)+H_{2}0(l)- > ADP(aq)+H_{2} PO\frac{}{4} (aq)[/tex]
where ADP represents adenosine diphosphate. For this reaction, a. Calculate at b. If all the free energy from the metabolism of glucose
[tex]C_{6} H_{12}O_6(s)+6O_2(g)- > 6CO_2(g)+6H_2O(l)[/tex]
goes into forming ATP from ADP, how many ATP molecules can be produced for every molecule of glucose?
[tex]C_6H_1_2O_6(s)+O_2(g)- > 6CO_2(g)+6H_2O(l)[/tex]
goes into forming ATP from ADP, how many ATP molecules can be produced for every molecule of glucose?
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This pedigree tracks a recessive trait. What could person 3's genotype be?
Select all possibilities,
Based on the pedigree and the recessive nature of the trait, it can be concluded that the genotype of Person 3 is Aa.
What is recessive trait?A recessive trait is a trait or character encoded by a recessive gene.
A recessive trait does not appear in every generation bit only appears in the absence of the dominant trait.
From the pedigree shown, the recessive trait is h0m0zygous in 2 while 1 is heterozygous for the trait.
Person 3 is heterozygous recessive for the trait too.
Therefore, the genotype of person 3 is Aa.
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Can someone please help me
4. An increase in calcium concentration in the sarcoplasm will cause which of the following?
A. displacement of troponin tropomyosin complex from the actin binding sites
B. muscle relaxation
C. rapid repolarization of the muscle membrane
D. breaking of the actin/myosin cross-bridges
E. activation of calcium pumps in the sarcoplasmic reticulum
Answer:
B. muscle relaxation
Explanation:
Sarcoplasmic reticulum store intracellular calcium in skeletal muscle cells.
The concentration of calcium helps in the contraction and relaxation of muscles. During depolarization, the calcium concentration increases that change conformation of troponin and tropomyosin and allows the actin to bind with myosin, resulting into relaxation of the muscle cell.
Hence, the correct option is "B. muscle relaxation".
The law of supply and demand states that a product becomes more valuable if:
O It has a short demand and is in O short supply.
It has a great demand but is in short supply.
O It has a great demand and is in great supply.
O It has a short demand but is in great supply.
Answer:
it has a short demand but it is in great supply
Bacteria that are resistant to more than one antibiotic are called superbugs. Compare the control and antibiotic data from the three farms and select all the true statements.
A: Another superbug was created by using the same method of giving antibiotics to chickens as Monita Farms.
B: Our experiment was a failure.
C: The data for the control farm shows that not administering antibiotics helps to prevent superbug creation.
D: Natural selection is not a possible cause of the superbug creation on Monita Farms.
E: There was no reason to test the control solution.
Answer:
A and C according to another https://brainly.com/question/22872829
Explanation:
follow the steps outlined below to determine whether each solution is hypotonic, hypertonic, or isotonic to the cell
Answer:
the solution is hypotonic if there is a lower solute concentration in the solution than in the cell
the solution is isotonic if the solute concentration is equal in the cell and solution
the solution is hyperotonic if there is a higher solute concentration in the solution than in the cell
Which is expected to happen during El Niño?
O A. Drought conditions in Australia
O B. Cool temperatures in the equntorial Pacific
O C. An increase in the pressure gradient
O D. Unusually high fish yields in Peru
Helppppp please
Drought conditions in Australia is expected to happen during El Niño. The correct option is A.
What is El Niño?El Niño is the warm stage of the El Niño-Southern Oscillation, and it is affiliated with a ring of warmer ocean water that forms in the eastern and central equatorial Pacific, along with the area off South America's Pacific coast.
Because of the transition in rainfall away from the western Pacific caused by El Niño, Australian rainfall is typically reduced during winter and spring, especially in the eastern and northern parts of the continent.
Developing countries that depend on agriculture as well as fishing, notably those bordering the Pacific Ocean, are typically the most affected.
The pool of warm water in the Pacific near South America is often at its warmest around Christmas during this phase of the Oscillation.
Thus, the correct option is A.
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The ability of large trees and plants to draw water up through there trunks/stem is due to
A. adhesion
B. cohesion
C. hydrogen bonding
D. surface tension
Answer:
Answer if B, Cohesion
Explanation:
Think about if you had glue and paper, the glue sticks to the paper, the same as water would stick to the sides of the tree/stem, to draw the water up.
what is qualitative in biology
Answer:
To describe or define the characteristics of measurements, or recations.
What BEST describes the role of water molecules in the chemical reactions of photosynthesis?
Water molecules are an intermediate c. Water molecules are an input of
of photosynthesis, they absorb light photosynthesis, they split apart and
and pass the energy to chlorophyll supply electrons to chlorophyll to
make glucose
b. Water molecules are an intermediated Water molecules are an output of
of photosynthesis, they are part of the photosynthesis, they are released at
electron transport chain
the end of the electron transport chain
Answer:
The options to this question is unclear. However, the question will be answered comprehensively.
Water molecules are an input of photosynthesis; they split apart and supply electrons to chlorophyll to make glucose.
Explanation:
Photosynthesis is the unique process through which green plants manufacture their food (glucose). This photosynthetic process occurs in two stages viz: light dependent and light independent stages. The light dependent stage, which occurs in the thylakoid membrane of the chloroplast, involves the synthesis of NADPH and ATP.
Water molecules are reactants (inputs) of this light stage, where they are split by the energy absorbed by chlorophyll in a process called PHOTOLYSIS. Water molecules get split into hydrogen ions (proton), oxygen gas and electrons. The electrons are accepted by NADP+ while the protons are used to build a proton pump for the synthesis of ATP. Both NADPH and ATP are used in the next stage to make glucose.
Determine what type of tonicity describes the cell when compared to the described solution: an Isotonic Cell(s), Hypotonic Cell(s), or Hypertonic Cell(s): The concentration of dissolved substances (stuff) in the solution is lower than the concentration inside the cell.
Answer:
Hypotonic Tonicity
Explanation:
Hypotonic tonicity is when the concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell.
Which describes slate? non-foliated igneous does not split into layers grains arranged in parallel layers
The answer is D. Grains arranged in parallel layers.
Answer:
D. arranged in parallel layers
Explanation:
I just took the test and if you see an image of slate then you will see it is arranged with parallel layers.
HOPE IT HELPS!!!
Which of the following factors are considered abiotic?
A. Rain
B. Bacteria
C. soil
Answer:
rain
Explanation:
i did some research and i hope i got this right if it isn't pls let me know