A complicated substance with significant heterogeneity is trabecular bone. Depending on the anatomical region and with age, its elastic and strength qualities change significantly also sickness.
The relevance of architecture and tissue material qualities is still unclear, despite the fact that these characteristics are highly dependent on density. Interesting facts about the strains the point at which the bone fails is essentially independent of density. Currently being done, there are more sophisticated structure-function relationships that underlie such behavior mechanical characteristics such time-dependent failure, damage, and multiaxial loading accumulation.
The microstructural class of finite element models, especially the "high-resolution" models, offers a special method for investigating such phenomena. With continuing research in this area, it is anticipated that significant understanding will be gained into issues including osteoporosis, bone fracture, bone remodeling, and the design/analysis of bone-implant systems. This article examines the current status of trabecular bone biomechanics, concentrating on the mechanical elements, and makes an effort to pinpoint crucial areas for present and future study.
Learn more about Bone, here
https://brainly.com/question/5482443
#SPJ4
What are the subunits of DNA and their function?
Rawr!~ I'm Ash And I'm going to help you today! :P
Answer:
The subunits of the DNA molecule are the nucleotides, which are its monomers and which are conformed at the same time by other structures, such as (1) one or two carbon sugar rings known as pentoses or deoxyriboses; (2) a phosphate group at the 5' carbon atom; the lack of an oxygen atom at the 2' carbon atom of the ring; and (3) the nitrogenous bases, which are Adenine, Cytosine, Thymine, and Guanine.
Explanation:
About whether the nucleotide has one or two carbon rings, it's important to say that it depends on the kind of nitrogenous bases, which could be pyrimidines (Cytosine and Thymine), and purines (Adenine and Guanine) having one carbon ring and two carbon rings, respectively. With this clear, we can say that both pyrimidines and purines complement each other, so they can't pair with another nucleotide of the same nature (pyrimidines and pyrimidines, or purines and purines can't match together, but pyrimidines and purines can do it), because of the number of hydrogen bonds they can share among them (2 hydrogen bonds between thymine and adenine, and 3 hydrogen bonds between guanine and cytosine).
The main functions of these three different parts of the nucleotide are to give the DNA molecule stability to avoid being denaturated and to store the genetic information which will be required for protein production.
Answered by:
AshtheNeko
this hearty component of the hair houses the melanin pigments and provides most of the hair's strength:
Approximately 90 percent of the hair's total weight lies within in the cortex layer. Elongated cells form the fibrous substance that gives the strength and the elasticity to the hair. The cortex was also houses the pigment (melanin) that gives the hair as its natural color.
The cerebral cortex, which also known as the cerebral mantle, is the outer layer of the neural tissue of the cerebrum of the brain and in the humans and other mammals. The cerebral cortex was mostly consists of the six-layered which is neocortex, with just about 10% consisting of the allocortex. By convention, there are basically six cortical layers, but this organization may be vary throughout the cerebral cortex of the given species or between the species: many regions that lack one or more then layers, whereas in other regions there is good reason to be consider more than six layers.
To know more about cortex layer visit:
https://brainly.com/question/18527004
#SPJ4
a typical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. what is the volume of the cell including the membrane? to simplify the calculations, model the cell as a sphere.
Volume of cell including the membrane = 9.07* 10^11 nm³
Given data:
Diameter of human cell = 12.00 μm = 12,000 nm i.e. radius = 6000 nm
thickness of membrane enclosing the human cell = 5.00 nm
Total diameter of cell including membrane = 12,000+ (52) = 12010 nm
Solution:
Volume of cell (sphere) = 4/3πr^3
where: r = 12010 / 2 = 6005 nm
4/3 * π * (6005)^3 = 9.07 * 10¹¹ nm³
Hence, volume of cell aolng with membrane is 9.07 * 10¹¹ nm³
Learn more about Cell here:
https://brainly.com/question/13920046
#SPJ4
thyroid storm. which treatment should you initiate to reduce his level of circulating thyroid hormone?
High-dose of propylthiouracil (PTU) or the methimazole may be used for the treatment of the thyroid storm. PTU has been theoretical advantage in the severe thyroid storm because of its early and onset of action and to capacity to inhibit the peripheral conversion of T4 to T3.
Thyroid storm is the rare life-threatening condition of the thyroid gland. that develops in cases of the untreated hyperthyroidism, or to overactive thyroid (thyrotoxicosis). The thyroid gland is also located in the neck, just to above where that your collarbones meet in the middle of Thyroid storm is the life-threatening health condition that is also associated with the untreated or undertreated hyperthyroidism. During the thyroid storm, an individual's heart rate, the blood pressure, and the body temperature can soar to the dangerously high levels. Without to prompt, the aggressive treatment, the thyroid storm is often fatal.
To know more about Thyroid storm visit:
https://brainly.com/question/14292688
#SPJ4
a parasitic or infectious cause that is a leading cause of death for children under the age of five in sub-saharan africa but not very important in other regions is: a. pneumonia b. malaria c. helminthic infections d. diarrhea
A parasitic or infectious cause that is a leading cause of death for children under the age of five in sub-Saharan Africa but not very important in other regions is option(d) i.e. diarrhea.
There are causes of diarrhea outside underlying diseases. A liquid diet, food intolerance, stress, anxiety, and laxative use are a few examples. Preterm birth problems, pneumonia, infant asphyxia, diarrhea, and malaria are the leading causes of death among children under the age of five. Malnutrition is a factor in about 45% of all toddler fatalities. Compared to young people in affluent regions, children in sub-Saharan Africa have a larger than 14 times greater risk of dying before the age of 5.
It is notable that about 40% of all diarrhea-related fatalities in children under five worldwide take place across the African continent. The high death rate from diarrhea among children under five in Sub-Saharan Africa demonstrates the widespread prevalence of this curable and avoidable illness in the area.
Learn more about diarrhea here: https://brainly.com/question/20370879
#SPJ4
Is legal abortion bad for society? Can this question be answered by scientific research or not?
Answer: I feel in my option it isn't bad. If you're a woman, I feel the government shouldn't have control over your body. What if I girl was forced to do (yk) and had the baby. They didn't want the baby and especially kids, kids shouldn't have to have kids!
Explanation:
When there is a negative charge inside an axon and a positive charge outside of it, the neuron is.
The sodium pumps keep sodium out and potassium in while the sodium gates and potassium gates are completely closed when an axon is at rest, giving it a negative charge. This passive condition is referred to as a resting potential because of the positive-negative contrast between the interior and the outside.
The characteristic resting potential voltage of each axon is a negative value compared to the outside in all instances.In a neuron that is at rest, the interior of the cell is roughly 70 millivolts more negatively charged than the exterior (70 mV; note that this value varies depending on the species and type of neuron).Action potential refers to this positive charge located inside the cell. An action potential cycle lasts between one and two milliseconds. Once again more permeable to K+ ions, the membrane eventually becomes positively charged inside the axon. It repolarizes the membrane.Because the inside of the neuron is negative compared to the outside and there are much more sodium ions on the inside, sodium ions rush within the cell. The neuron gets more positive and depolarized because, as you may recall, sodium contains a positive charge.Learn more about axon here:
https://brainly.com/question/2015960
#SPJ4
explain the convection cycle that takes place within Earth’s layers. Describe the source of thermal energy; the direction of flow for thermal energy and matter; the role of gravity in the process. Choose the statement that has all information correct.
A. nucleic radiation in Earth's core; matter heats and moves upwards; then cool areas of the mantle move down
B. nuclear radiation in Earth's core; matter heats and moves in a spiral; then cool areas of the mantle move down
C. nuclear radiation in Earth's core; matter heats and moves upwards; then cool areas of the core also move up
D. nuclear radiation in Earth's core; matter heats and moves upwards; then cool areas of the mantle move down
Nuclear radiation in Earth's core; matter heats and moves upwards; then cool areas of the mantle move down.
What is convection?The term convection has to do with the situation in which there is a transfer of heat energy by the actual movement of the particles of the substance. We know that convection occurs within Earth’s layers.
The statement that correctly describes the movement of heat in the convection of the earth's layers is; nuclear radiation in Earth's core; matter heats and moves upwards; then cool areas of the mantle move down.
Learn more about convection:https://brainly.com/question/4138428
#SPJ1
me ulagram represents the movement of sugar molecules across a plasma
membrane.
(outside the cell)
or sugar
Plasma
membrane
(inside the cell)
Which of the following arguments BEST explains the movement of the sugar
molecules?
O
The sugar molecules moved across the membrane through active transport due
to the higher concentration of molecules on the outside of the cell and a lesser
concentration of molecules inside the cell.
The sugar molecules moved across the membrane through osmosis due to the
higher concentration of water molecules outside the cell and the lesser
concentration of water molecules inside the cell.
The sugar molecules moved across the membrane through facilitated diffusion
due to the higher concentration of molecules outside of the cell and the lesser
concentration of molecules inside the cell
The sugar molecules moved across the membrane through diffusion due to the
higher concentration of molecules inside the cell and a lesser concentration of
molecules outside of the cell.
The sugar molecules moved across the membrane through osmosis due to the higher concentration of water molecules outside the cell and the lesser concentration of water molecules inside the cell.
What is osmosis?Osmosis is the process by which water molecules pass through a cell's partially permeable membrane from a solution with a high concentration of water molecules to one with a lower concentration. The best way to describe osmosis is as the transfer of water from a region of high water concentration to a region of low water concentration through a semipermeable membrane.
What is osmosis function?Osmosis is the process by which water passes through a semipermeable membrane from an area of LOW solute concentration (low osmolarity) to an area of HIGH solute concentration (high osmolarity). One of the most crucial processes for plants and animals to reach homeostasis is osmosis.
To know more about homeostasis :
https://brainly.com/question/3888340
#SPJ9
What molecule is the source of the oxygen that is released as a byproduct of photosynthesis?.
Water molecule is the source of the oxygen that is released as a byproduct of photosynthesis.
Does photosynthesis produce ATP?The light reactions capture the energy of the light and use it to drive electron exchanges. Despite some using infrared light, the majority of photosynthesis-producing species use visible light. Products of these reactions include decreased nicotinamide adenine dinucleotide phosphate and adenosine triphosphate (ATP) (NADPH).
During the process of photosynthesis, cells use carbon dioxide and energy from the sun to make sugar molecules and oxygen. These sugar molecules are basis for more complex molecules made by the photosynthesis cell .
To learn more about Photosynthesis refer
https://brainly.com/question/1388366
#SPJ4
connective tissue and the arrangement of cells in image B, what is this tissue’s function in the body?
Connective tissue is a type of tissue which is responsible for the support, protection and forms the structure of different tissues and organs in the body.
What is connective tissue?Connective tissue is a type of tissue which is responsible for the support, protection and forms the structure of different tissues and organs in the body. It is made up of cells and extracellular components. Within the extracellular components we find the fundamental substance and fibers are the ones that will give the characteristics to the tissues that will form.
The fundamental substance, on the other hand, is going to be the solution in which the fibers and cells of the connective tissue are immersed. It will be made up of proteins and glycosaminoglycans that will give it a gelatinous consistency.
Therefore, we can confirm that connective tissue is a type of tissue which is responsible for the support, protection and forms the structure of different tissues and organs in the body.
To learn more about connective tissue visit: https://brainly.com/question/17664886
#SPJ1
Ocean to cloud 2 transitions
Answer:
Water cycle
Explanation:
The name used to describe the constant recycling of the earth's water. During the cycle, water given off by plants, water in rivers, streams, puddles, lakes, and oceans, and surface water evaporates, making water vapor. This vapor rises, forms clouds, and then falls as rain, hail, or snow.
Please answer fast.
Answer:
w
Explanation:
Feature of Life. Frog. Fast-moving stream
made of cells? Yes. Yes, because All animals
are made of cells
uses energy? Yes. Yes in order to stay alive
you need food which
gives you energy
responds and adjusts. Yes. Yes, in the winter frogs go to change?…… Into hibernation which
freezes their body?
reproduces? Yes. Yes, in order for the species to not go extinct.
grows and develops? Yes. Yes it goes for a tadpole to a frog
Is this correct or wrong
The smallest unit of life, a cell, is regarded as being the most fundamental unit of life. All living things are composed of cells, which can number from one (unicellular) to many trillions.
Cell biology is the study of cells, including their physiology, structure, and life cycle.
Frogs can be found in a variety of habitats, including deserts, cold tundras, and tropical rainforests.The majority of frogs live in aquatic and swampy areas because their skin needs fresh water.Frogs hibernate when the temperature drops below zero.This helps them endure the colder months when food is limited and fluctuations in the outside temperature cause their core temperature to drop.Some species, such as tree frogs, will hibernate in even warmer temperatures.The pattern of tadpole metamorphosis includes gradual forelimb and hindlimb development, resorption of the tail, intestinal shortening, gill removal, and lung formation. After metamorphosing, the tadpole emerges onto land as a baby froglet or toadlet.
Learn more about frogs here:
https://brainly.com/question/26622428
#SPJ4
Why do lunar and solar eclipses not happen every month?
HURRY
Lunar and solar eclipses does not happen every month simply because the orbit of the earth around the sun is completely different from the orbit of the moon around the Earth.
What is meant by lunar and solar eclipses?The solar eclipse also known as the eclipse of the sun is a phenomenal whereby the moon is in-between the earth and the sun.
The lunar eclipse on the other hand occur when Earth itself blocks the sun's body, thereby; casting a shadow over the surface of the moon.
So therefore, lunar and solar eclipses does not happen every month simply because the orbit of the earth around the sun is completely different from the orbit of the moon around the Earth.
Learn more about the solar and lunar eclipse:
https://brainly.com/question/19695125
#SPJ1
which substance absorbs energy quicker light or dark color objects and why?
Answer:
Dark-colored materials both absorb and emit energy more readily than light-colored materials.
How do Producers affect the
Environment?
Answer:
producers in an ecosystem provide food and nourishment for other species.
Explanation:
The primary energy is created by a producer.
Help if u can please with 10 and 11
Answer:
with number 9 it can depending on the subject since sicence also includes math
Explanation:
The process of natural changes that take place during An organisms life is called
The process of natural changes that take place during an organisms life is called development
An organisms life can be divided into different phases which have its own important characteristics.
The first phase is called the vegetative or juvenile phase in which the development of the organism takes place but there is not reproductive growth.
The second phase is the reproductive or mature phase in which the organism is able to undergo reproduction and produce offsprings.
The third phase is the senescence or old age which is the last age when the growth slows down and eventually the organism dies.
To learn more about organisms life here
https://brainly.com/question/12600270
#SPJ1
Pottasium
Atomic # =
Atomic Mass
# of Protons =
# of Neutrons =
# of Electrons=
The contraction of muscles in your body is a good example of a coupled reaction. Why?
The contraction of muscles involves the coupling of ATP hydrolysis with the movement of myosin and actin filaments.
Chemical processes and mechanical movement are connected in muscle contraction. ATP hydrolysis into ADP and Pi provides muscular contraction energy. Myosin and actin filaments contract when ATP hydrolysis releases energy.
ATP hydrolysis coupled with muscular action conserves energy. At rest, muscles synthesise and store ATP molecules for future contractions. ATP hydrolysis releases energy that slides myosin and actin filaments to shorten muscular fibres and contract the muscle.
Muscles need chemical energy release and mechanical activity to move limbs, breathe, and pump blood. It shows the body's efficiency and coordination.
Learn more about muscle contraction, here:
https://brainly.com/question/33888889
#SPJ7
A student needs to measure the volume of a sample of liquid. Which graduated cylinder shown below should the student use to measure the volume of this liquid most accurately?
To measure small liquid samples, the most accurate elements are graduated cylinders that have the most precise scale on them. Among the options, we should choose the one with more etchings.
What is the most accurate element to measure liquids?When working with liquids, we need to be precise, so we should choose a material that provides us with the necessary to make an accurate measure.
First, we need to choose a graduated element, which means that lines on it will indicate the amount of liquid on it.
Now, in the laboratory, several elements are graduated. So to take an accurate measure, we need to choose the correct one. To do it, we need to consider our sample size (large or small sample).
For instance, beakers or flasks should not be used to measure small liquid samples because they do not have a precise measuring scale.
These glasswares are prepared only to make crude measurings. So unless your sample is too large, it is not recomended to use them.
However, if our sample is small, we can use other appropriate elements instead. Among them, we can mention graduated cylinders and pipets, volumetric pipets, or burets.
These graduated or volumetric elements have rules with many etchings that can be used to make more precise measurements.
The more etchings there are in the element, the more precise it is, and the more accurate the liquid measure will be.
Note: Since I do not have the image of the graduated cylinders, I advise you to consider your sample size, and if it is a small one, then you should chose the cylinder with more etchings, which will be the most accurate one to take the measures.
You can learn more about liquid measures at
brainly.com/question/28246821
#SPJ1
the initial statement of the (click to select) hypothesis proposed that over time a bacterial endosymbiont of an ancestral cell in the eukaryotic lineage lost its ability to live independently.
The initial statement of the Endosymbiotic hypothesis proposed that over time a bacterial endosymbiont of an ancestral cell in the eukaryotic lineage lost its ability to live independently.
What is Endosymbiotic ?Endosymbionts are living things that coexist well with other cells or creatures. Some endosymbionts are intracellular, or located inside cells; other endosymbionts adhere to the surface of cells (extracellular). Relationships that benefit both parties are said to be symbiotic.
According to the endosymbiotic theory, some eukaryotic cell organelles, such mitochondria and plastids, descended from prokaryotes that were free to move around. As proposed by Margulis, the information at hand suggests that the evolution of the eukaryotic cell was first sparked by the mitochondrial endosymbiosis.Learn more about Endosymbiotic here:
https://brainly.com/question/1698852
#SPJ4
how is sociological perspective different from the perspective used in economics or political science
The distinction between sociology and political science is that sociology focuses on how the political system affects other institutions in society, whereas political science devotes more attention to the forces that shape political systems and the theories for understanding these forces.
What is Sociology?This is defined as the study of human societies and their interactions with one another. It also studies the different processes that is responsible for their preservation.
Political system are part of the institutions which are responsible for shaping a society through the different laws created by them. It also studies how human behaviors are treated based on the rule of law.
Political science on the other hand is primarily concerned with the forces that shape political systems and the theories for understanding these forces.
Read more about Sociology here https://brainly.com/question/14363783
#SPJ1
systemic inflammatory and autoimmune manifestations associated with myelodysplastic syndromes and chronic myelomonocytic leukaemia:
In a French multicenter retrospective analysis, we discuss systemic inflammatory and autoimmune diseases (SIADs) that are linked to myelodysplastic syndrome (MDS), their therapies and prognoses, and the effect of SIADs on overall survival Methods.
Myelodysplastic syndromes and chronic myelomonocytic leukemia In this study, 123 patients with MDS and SIADs have been analysed. Results.Mean age was 70 years and the male:female proportion was 2. The SIADs were systemic inflammation in 39 (32%) cases, CTD in 31 (25%) cases, inflammation arthritis in 28 (23%) cases, a neutrophilic disease in 12 (10%) cases and unidentified in 13 cases (11%).In 75 (66%) cases, the SIADs met the standard classification criteria, while the criteria were not fully met in 21 (19%) cases. Chronic myelomonocytic leukemia (CMML) and systemic vasculitis were significantly associated (P = 0.0024).118 (96%) SIAD patients were dealt with (91% with steroids), with a 83% reaction to first-line treatment, including 80% for steroids alone. A second-line treatment for SIADs was expected for steroid reliance or backslide in 48% of cases.Contrasted and 665 MDS/CMML patients without SIADs, MDS/CMML patients with SIADs were more youthful (P \textless 0.01), male (P = 0.03), less frequently had obstinate iron deficiency with ring sideroblasts (P \textless 0.01), all the more frequently had an unfortunate karyotype (16% versus 11%, P = 0.04) and less oftentimes had a place with low and halfway 1 Global Prognostic Scoring Framework classes, yet no endurance distinction was seen between patients with MDS-related SIADs and without SIADs (P = 0.5).learn more about leukaemia here
https://brainly.com/question/11410603
#SPJ4
_______is the collection, analysis,
modeling, and distribution of
information gathered from large
quantities of biological data, as in
genetic research.
Bioinformatics is the collection, analysis, modeling, and distribution of information gathered from large quantities of biological data, as in genetic research.
In particular when the data sets are big and complicated, it is an interdisciplinary field that creates techniques and software tools for comprehending biological data. To analyze and interpret the biological data, the interdisciplinary discipline of research known as bioinformatics brings together biology, chemistry, physics, computer science, information engineering, mathematics, and statistics. Biological inquiries have been analyzed in silico utilizing computational and statistical methods and bioinformatics.Both biological investigations that incorporate computer programming into their technique and specialized analysis "pipelines," particularly in the field of genomics, are included in bioinformatics. Single nucleotide polymorphisms and candidate gene identification are frequent applications of bioinformatics (SNPs).Therefore, bioinformatics is the correct answer.
Learn more about Bioinformatics:
https://brainly.com/question/2492878
#SPJ9
in e. coli, the adenine in the sequence gatc is methylated by the dam enzyme. in the same cells a restriction endonuclease recognizes and cleaves dsdna with gatc on either strand. why does e. coli have these two enzymes?
E. coli has the enzymes Dam methylase and restriction endonuclease for their protection. These enzymes identify the invader genomes as they do not have methylated genome and hence endonuclease cleaves it.
Dam methylase enzyme functions to methylate the adenine in GATC sequence. This methylation serves various purposes like: regulation of gene expression, during mismatch repair, and during replication.
Restriction endonuclease is the enzyme that cuts the DNA strands at specific locations towards the inside of the DNA. All the prokaryotic organisms contain this enzyme. The primary function of this enzyme is to protect from foreign invaders. The enzyme is also highly used in laboratories.
To know more about restriction endonuclease, here
brainly.com/question/14755040
#SPJ4
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water allows it to prevent large fluctuations in body temperature?.
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Water’s High Heat Capacity is the property of water which allows it to prevent large fluctuations in body temperature.
Heat capacity is known as the capacity of a body to absorb heat energy. The heat capacity of water is high, which means that a very high temperature is required to change the temperature of the human body.
This property resists the sudden temperature changes in the body and hence the human body does not experience large fluctuations in temperature.
If you need to learn more about heat capacity of water, click here
https://brainly.com/question/13845112?referrer=searchResults
#SPJ4
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. The property of water that prevents large fluctuations in body temperature is water has a high capacity for heat.
Water has a high heat capacity, so it takes up much energy before it gets hot. You may not realize how this affects you, but the particular water temperature significantly impacts the Earth's climate and directly influences the survival of many places worldwide.
Water has a high heat capacity, which means that it requires more energy to raise the water's temperature than other substances. This explains why water prevents large body temperature fluctuations. Water's high specific heat also helps to control the speed at which air temperature changes, which is why temperature changes between seasons are gradual rather than abrupt, particularly near the oceans.
To learn more on water temperature: brainly.com/question/26846829
#SPJ4
Which statement best illustrates how an organism maintains homeostasis?
Some species of bamboo plant can grow up to a meter in a single day.
Groundhogs hibernate during the winter to conserve energy when food is scarce.
Female squirrels engage potential mates in a chasing competition.
Blue whales reproduce every 2 to 3 years and give birth to one calf.
The statement that best illustrates how an organism maintains homeostasis is as follows: groundhogs hibernate during the winter to conserve energy when food is scarce (option B).
What is homeostasis?Homeostasis is ability of a living organism to adjust its internal environment to maintain a state of dynamic constancy.
Homeostasis is a pivotal process that determines the adaptation and survival of an organism in an environment.
Hibernation is a specific type of homeostatic behavior that involves the state of inactivity and metabolic depression in animals during winter.
Therefore, it can be said that the statement that best illustrates how an organism maintains homeostasis is as follows: groundhogs hibernate during the winter to conserve energy when food is scarce.
Learn more about homeostasis at: https://brainly.com/question/3888340
#SPJ1
During this phase of mitosis, the mitotic spindle forms and the nuclear envelope fragments.
Mitotic spindle forms and the nuclear envelope fragments at the prophase stage of mitosis.
What are the stages of mitosis?Mitosis has 4 main stages that are more or less in a continuous spectrum. These stages are:
ProphaseMetaphaseAnaphaseTelophaseThe prophase stage is characterized by the dissolution of the nuclear envelope, the condensation of chromatin materials, and the onset of spindle formation.
The metaphase stage is characterized by the alignment of chromosomes at the equator and the engagement of each chromosome by spindle fibers at the centromere.
The separation of sister chromatids characterizes the anaphase through the shortening of the spindle fibers from the opposite ends of the cell.
The telophase is characterized by the completion of the migration of sister chromatids to the poles.
Thus, the mitotic spindle forms and the nuclear envelope fragments at the prophase stage of mitosis.
More on mitosis can be found here: https://brainly.com/question/26678449
#SPJ1