The items that are pure elements are Iron and Carbon
Pure elements are one that contains a single form of atom i.e., one kind of particle.
Iron (Fe) is a metal that belongs to pure elements as it has homogenous chemical composition. It cannot be broken by any chemical methods because it is the simplest form of the element. Similarly, Carbon (C) is also a pure element with homogenous chemical composition.
On the other hand, Cheese is a mixture. The basic ingredients used for the production of cheese are milk, salt, starter culture, and rennet. These result in cheese with constituents of milk, microorganisms and breakdown products of the reaction which contributes to the color and flavor of the product.
Therefore, Iron and Carbon are the pure elements
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Which of the following is an ADVANTAGE of using coal for energy?
A. it has lots of impurities
B. it produces lots of ash
C. it releases lots of carbon dioxide
D. it releases lots of heat
Answer:
the answer is D. it releases lots of heat
Coal releases lots of heat is an advantage of using coal for energy. Therefore, the correct statement is option D.
What are the disadvantages of using coal?Coal is a fossil fuel that is used to generate energy in many parts of the world. When coal is burned, energy is released in the form of heat that generates electricity. Coal is a fossil fuel used for centuries to provide heat to homes, industries, etc., and provides a significant source of electricity in many parts of the world.
Coal is also relatively abundant and is easily transported, which makes it cost-effective for energy production. However, there are also several disadvantages to using coal.
Burning coal produces a large amount of carbon dioxide, a greenhouse gas contributing to climate change. Coal mining and transport also have negative impacts, such as air and water pollution, habitat destruction, and displacement of communities.
Therefore, coal releases lots of heat is an advantage of using coal for energy.
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the most important factor contributing to the modern day extinction of hundreds of species on the eartjh
Let's remind ourselves of what we predicted last week:
Go to question 4 on Lesson 7 and review what you predicted would happen to the populations of the buffalo and wildebeest after
1975.
Lesson 7 question 4 # is
4. Could these discoveries help predict the patterns we may see in the population size due to things like the emersion and elimination of the rinderpest? Based on our simulation results what do we predict will happen to the populations of the buffalo and wildebeest after 1975?
Yes, these findings are pretty helpful in predicting trends in population growth that might result from situations like the advent and eradication of the rinderpest. The outcomes of the simulations we performed to forecast what will happen to the buffalo and wildebeest populations after 1957 it will go back to normal.
1. Revisit your prediction from Lesson 7. What information would you need to know in order to determine if your prediction was correct? Explain why the information would help determine if your prediction was correct.
Answer: My hypothesis is correct because in the 1960s, the buffalo population in Serengeti National Park, Tanzania, began increasing at a rate much faster than before. Scientists determined that this increase was due to several factors, including the eradication of a disease called rinderpest and this how I think my hypothesis is correct.
Explanation:
something in an experiment that can changed is called what?
a. cell.
b. variable.
c. hypothesis.
d. dependent
Answer:
B
Explanation:
how does the lipid bilayer of a membrane form a barrier to molecules
The lipid bilayer functions as a barrier to molecules Because it is made up of densely packed molecules with lengthy nonpolar hydrocarbon chains.
The lipid bilayer is a fundamental part of every cell membrane. Because it is made up of two layers of fatty acids arranged in two sheets, the structure is known as a "lipid bilayer." The lipid bilayer, which surrounds all cells and provides the cell membrane structure, is normally between five and ten nanometers thick. The lipid bilayer serves as a barrier, retaining ions, proteins, and other molecules where they are required while preventing their diffusion into unintended locations.
Simple Diffusion Across the Cell Membrane:
The lipid bilayer's structure enables for simple diffusion of hydrophobic molecules like lipids as well as tiny, uncharged substances like as oxygen and carbon dioxide to move through the cell membrane along their concentration gradients.
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if calcium is given, then bone strength will increase. what is the controlled variable?
8 Answer:
_____ is the best and least expensive way of destroying microbes.
a. Freezing c. Radiation
b. Controlling moisture levels d. Heat
9 Answer:
Because of its _____, food is a good place for microbes to grow.
a. volatility c. nutrients
b. nooks and crannies d. temperature
10 Answer:
Every 18°F (10°C) that the temperature of a food is reduced
slows chemical and biochemical reactions by almost _____.
a. three quarters c. one third
b. one half d. two thirds
Answer:
8: d: Heat.
9: c: Nutrients.
10: b: One Half (?).
Hope this helps <33
Error bars on a graph indicate ____
A. places where the data is likely wrong
B. places where the researcher is unsure of his or her results
C. variation in results that cannot be accounted for
D. variation in a set of data around the average
E. poor experimental technique on the part of the researcher
Error bars on a graph indicate variation in a set of data around the average.
The uncertainty or change of the corresponding coordinate of the point is shown by an error bar, which is a line drawn through a point on a graph that is parallel to one of the axes. The standard deviation of a data set is most frequently represented by the error bars in IB Biology.
Confidence intervals, standard errors, standard deviations, and other values may be displayed by error bars. Figure legends must specify what error bars are meant to depict because different error bar kinds provide very different information.
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How did experiments with mice contribute to our understanding of animal development?
Mice are used as the model species to learn different behavior of animal, physiological activities and doing experiment on mice will give us the knowledge to learn much better when there’s more mice rather than being alone.
Why Do We Experiment on Mice?Choosing mice as model organism for experiments makes a sense for more imaginative than scientific, these are small, don't need a lot of space, don't cause much damage when it is provoked, safe to do experiment on mice in lab.
It can be easily modified genetically which means scientists can manipulate any gene on any chromosome at any time, so that certain genes can be modified into inactive or turned off.
The scientist can manipulated mice and the process is called as knockout mice and they are a boon to researchers who are attempting to study how a certain genes can cause diseases.
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the sap is transported from roots to leaves through xylem by :
{A}.... transpiration pull
{B}.... adhesion
{c}.... Cohesion
{D}....TACT force
answer is A transpiration pull
Define restorative care and what role it would play in helping with Mrs gregs rehabilitation how could the psw assist with this process
Restorative care has been a part of the process of rehabilitation and it totally focuses on helping the patients to regain their old happy and independent life.
What is restorative care?Restorative care is defined as mental care, social care, as well as emotional care. Restorative care has been a part of the process of rehabilitation and it totally focuses on helping the patients to regain their old happy and independent life.
The main objective of rehabilitation center is to minimize the harmful effect of the dangerous health diseases as well as conditions generated from the chronic diseases.
Therefore, Restorative care has been a part of the process of rehabilitation and it totally focuses on helping the patients to regain their old happy and independent life.
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1. Look at this picture to answer the question. Monomers join together to
make polymers. Which best describes the picture below?
A
C
B
* 1 point
A and c are like polymers and b is like a monomer
A and b are like polymers and c is like a monomer
A and b are like monomers and c is like a polymer
A and c are like monomers and b is like a polymer
A and b are like monomers and c is like a polymer because A and B joined together to make C polymer, hence option C is correct.
What are polymers?Covalent bonds are used to join the monomers together to create the bigger molecules known as polymers which break down into monomeric units again.
Monomers generate water molecules as byproducts as a result. Dehydration synthesis, which means "to bring together while losing water," is the term used to describe this kind of process.
Therefore, A and B joined together to make C polymer, hence option C is correct.
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9. Naturopathy focuses on healing disease instead of restoring health.
O True
O
False
It's false that naturopathy focuses on healing disease instead of restoring health. So the correct option is B.
What is naturopathy?Naturopathy is a type of alternative medicine in which pseudoscientific techniques are used to promote self-healing, that is, it stimulates the body's healing capacity through different techniques such as acupuncture, aromatherapy, ozone therapy, traditional Chinese medicine, among others.
Some of the patients who are treated with this method say that they had an improvement but this does not have much scientific basis. It is more related to the fact that it is a placebo effect.
This belief will think of diseases as a mismatch in the person's energy field, so it will not focus so much on curing the symptoms of the disease but on helping the entire body in general.
Therefore, we can confirm that the correct option is B. False.
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and
wans
Using the 10% rule when
studying trophic pyramids, if
the primary consumers obtain
100 Joules of energy from the
autotrophs, how much energy
is then passed on to the
carnivores?
A. 100 Joules
B. 0.1 Joules
C. 10 Joule
Using the 10% rule when studying trophic pyramids, if the primary consumers obtain 100 Joules of energy from the autotrophs Carnivores receive an energy transfer of 10 Joules.
Trophic level is referred to as the level of an ecosystem as well as a nutritive chain or food chain.
What does the trophic level 10% rule mean?
The trophic level 10% rule states that only 10% of the energy in an ecosystem will be transferred from one trophic level to the next.
Based on their eating habits, a chain of organisms is separated into various tiers. The producers, or green plants, make up the first and lowest stratum, the primary consumers or the herbivores make the 2nd trophic level and the carnivores or secondary consumers make up the 3rd trophic level and within these energy is transferred.
In this question, the herbivores obtain 100J of energy from autotrophs now according to 10% law only 10% of this energy will be transferred to carnivores thus,
10 = [tex]x[/tex]/100 ×100
[tex]x[/tex]= 10J
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Drag each label to the correct location on the image.
Classify the examples based on knowledge representation.
salary information
different ways of reaching
a destination
students' marks in
different subjects
bank statement
shortest time or path
for network connection
different ways to cook
a meal in the given time
The data that could be shown by the use of numbers are;
1) Salary information
2) Bank statement
2) shortest time or path to a network connection
The data that could be shown by a graph are;
1) students mark in a subject
2) Different ways to reach a destination
3) Different ways to cook a meal in a given time
What is a graph?A graph is a representation of information by the use of cartesian coordinates. In this type of representation. We have the two axes, the vertical and the horizontal axes. We should know that not al data could be shown by the use of a graph. Graphs are used to show categorical data.
The data that could be shown by the use of numbers are;
1) Salary information
2) Bank statement
2) shortest time or path to a network connection
The data that could be shown by a graph are;
1) students mark in a subject
2) Different ways to reach a destination
3) Different ways to cook a meal in a given time
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What is the circumference of a circle
with a radius of 28 m?
Considering the definition of circumference of a circle, the circumference of a circle with a radius of 28 m is 175.93 m.
Definition of circle and circumferenceA circumference is a flat, closed, curved line whose points are the same distance from an interior point called the center.
The circle is the surface of the plane bounded by the circumference. That is, it is formed by all the points of the circumference and all the points of the plane inside it.
Definition of circumference of a circleSo, the circumference of a circle defines the length of the circle's outline. The circumference is also called the perimeter of the circle, because it is a measure of the limits of the circle.
That is, the circumference of a circle is the distance around the circle, also called the perimeter of the circle.
The expression to calculate the circumference of a circle "C" can be found by multiplying the number pi by the diameter of the circle "d":
C= π×d
The circumference of a circle can also be calculated using the length of the radius, considering the radius is half the diameter (or what is the same, the diameter is twice the radius):
C= π×2×r
Circumference of a circle in this caseIn this case, you know the circumference of a circle has a radius of 28 m.
Replacing in the definition of circumference of a circle:
C= π×2×28 m
Solving:
C= 175.93 m
Finally, the circumference of a circle with a radius of 28 m is 175.93 m.
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What are the three parts of a nucleotide what’s the correct answer answer asap ?
Answer:
The correct answer is A
Explanation:
Question 2:
Identify the revision(s) of the following unedited sentence that rectify the faulty comparison:
Rats that experienced psychological stress were found to have high levels of RCAN1 than control rats
RCAN1 levels were high in rats that experienced psychological stress than control rats.
Rats that experienced psychological stress were found to have higher levels of RCAN1 than did control rats.
Levels of RCAN1 were higher in rats that experienced psychological stress than control rats.
RCAN1 levels were higher in rats that experienced psychological stress than in control rats.
An early precursor to the development of neurofibrillary tangles and the neurodegeneration seen in Alzheimer disease, hyperphosphorylated tau protein (AT8 antibody) accumulates in transgenic mice overexpressing the RCAN1-1L protein.
Rats subjected to stress caused by immobility or isolation have higher levels in their hippocampus. Stress was applied to adult rats. Male Wistar rats that are eleven weeks old are cared for and worked on.
Acute stress may be protected against by transiently inducing the RCAN1 gene, but ongoing stress may lead to chronic RCAN1 overexpression, which can have dangerous side consequences. RCAN1 protein levels that are persistently increased may induce or aggravate a number of illnesses, including tauopathies like Alzheimer's disease. Through the inhibition of calcineurin and the stimulation of GSK-3 by RCAN1 proteins, stress can cause various disorders.
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What’s the answer???? This is biology.
Answer:
report results
Explanation:
Select the correct answer.
An agent has observed an environment. Now, it has to make some calculations based on the observations. Which process will it carry out before making a decision?
A.
learning
B.
perception
C.
knowledge representation
D.
offline computation
Answer: D offline computation
Explanation:
plato
Describe the structure of a typical eukaryotic chloroplast
(Q007) This figure shows
2
Click to view larger image.
O a right-lateral, strike-slip fault.
O a fault with a northwest strike.
O that a dip-slip motion has occurred along the fault trace.
O a fault produced by stretching.
The answer is A.
A right lateral strike slip fault. Now explaining one by one. So the first option tells about the dip slip motion of fault that is the motion along the dip direction of the fault. In this case there is no dip slip component as the blocks have moved horizontally along strike direction.
Fault produced by stretching are known as normal fault. Normal fault includes foot wall and hanging wall. But here the fault is vertical so there are no foot wall and hanging wall distinguishable.
The fault strikes NE -SW. So option B is not correct.
Now Only the option A. Strike slip fault is a vertical or nearly vertical fault with net displacement along the strike direction. The blocks have moved horizontally. If we refer to the man standing on one block ,then his front block has moved towards his right hand side. So the fault is known as Right lateral strike slip fault.
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what enzyme is in stuffing?
Answer:
maltase
Explanation:
well, the enzyme depends on the type of stuffing we're actually talking about. Stuffing, as in the breaded dish many families eat during Thanksgiving, would include high amounts of maltase to help in the aid of breaking down the glucose inside of the breading. If this 'stuffing' is not the meal that you can find on thanksgiving, please further let me know, as I would gladly assist you.
b) Methotrexate is a medication that prevents cells from making nucleotides. Explain how this could help fight a cancerous tumor.
The drug methotrexate belongs to the group of drugs known as antimetabolites. By reducing the growth of cancer cells, methotrexate treats cancer. In order to prevent the development of scales, methotrexate slows the growth of skin cells in psoriasis. Methotrexate may treat rheumatoid arthritis by reducing immune system activation.
Methotrexate obstructs the creation of DNA. This prevents cell division and growth, which slows or stops the growth of cancer. Cancer cells are more vulnerable to this harm because they divide more quickly and with less error-correcting than healthy cells do.
Acute lymphoblastic leukaemia (ALL), especially ALL that has progressed to the central nervous system, can be treated with methotrexate sodium alone or in combination with other medications.
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What tells you the size of the nucleus
Numerous structural elements of the nucleus, such as the nuclear envelope and DNA, regulate the size and shape of the nucleus.
One of the most noticeable features of a eukaryotic cell is its spherical nucleus, which normally makes up 10% of the cell's volume (refer the picture attached below).The nucleus of mammalian cells has an average diameter of about 6 micrometres.Lamins, intermediate filament proteins, are the proteins that make up the nuclear lamina. By supporting the nuclear envelope, they guarantee that the nucleus' general shape and structure are preserved.It makes sense that DNA may have an impact on nuclear volume as the size of the nucleus may be directly correlated with the quantity of DNA it contains and the degree to which that DNA is compacted.Hence, numerous structural elements of the nucleus, such as the nuclear envelope and DNA, regulate the size and shape of the nucleus.
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The debate the founding fathers had over legislature was?
The debate that the founding fathers of America had over the legislature was known as the Great Debate.
The change from the Articles of Confederation to the United States Constitution wasn't smooth, and there were numerous lengthy discussions both before and after the convention to address the issues with the earlier document. But one thing was clear, something needed to change. The Constitutional Convention of 1787 brought together fifty-five delegates to discuss the best ways to modify the existing text.The Federalists and the Anti-Federalists represented opposing viewpoints in the Great Debate. The Anti-Federalists opposed the ratification of the Constitution, whereas the Federalists did. The inclusion of the Bill of Rights was one of the main topics of discussion between these two parties. The Federalists claimed that this amendment was unnecessary since, as written, the Constitution merely limited the powers of the government, not the people. The Anti-Federalists argued that without a Bill of Rights, the populace would be vulnerable to despotism and that the Constitution granted the federal government an excessive amount of power.Learn more about the US Constitution here:
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Describe the physical characteristics of water that make it valuable resource for agricultural uses
Answer:
water helps crops to grow they have different kind of minerals in it which crips need to grow
Cells are often called "the _____ of life."
Answer:
I think it is the "building blocks of life"
Explanation:
Cells are the smallest living things in our bodies and what helps keep us alive. Without cells we wouldn't have simple things like blood, muscles, and nutrients needed to survive.
______ are chemical messengers secreted by glands.
Exocrine glands, such as sweat glands, secrete fluids through ducts. _______ glands secrete hormones directly into the bloodstream.
The _______ gland plays an important role in puberty and growth.
Epinephrine, triggering the "fight or flight" response, is produced by the _______ glands, which sit on top of the kidneys.
Most glands that secrete hormones operate using feedback mechanisms. When hormone concentrations are high, the gland will produce ________ of the hormone.
Many cells produce chemicals called _______, hormone-like substances that impact inflammation and reproduction.
The gland that helps regulate growth, body temperature, and the level of calcium in the blood is called the _______.
In order to reach different organs and tissues throughout the body, endocrine glands release hormones (chemical messengers) into the bloodstream.
Endocrine glands secrete hormones directly into the bloodstream.Hormones are directly released into the bloodstream by endocrine glands.
The pituitary gland plays an important role in puberty and growth.The pituitary gland regulates a variety of essential bodily processes and functions, including metabolism, growth, sexual development, reproduction, blood pressure, and many others.
Epinephrine, triggering the "fight or flight" response, is produced by the adrenal glands, which sit on top of the kidneys.Corticosteroid hormones and epinephrine, which are produced and released by the adrenal glands, keep blood pressure stable and control metabolism.
LessWhen hormone concentrations are high, the gland will produce less of the hormone.
Many cells produce chemicals called steroids, hormone-like substances that impact inflammation and reproduction.Eicosanoids (such as prostaglandins and thromboxanes), steroids, and phytoestrogens are examples of compounds that can be categorized as hormones (e.g. estrogen and brassinosteroid)
The gland that helps regulate growth, body temperature, and the level of calcium in the blood are called the thyroid and parathyroid.The thyroid and parathyroid glands are situated behind the larynx, in the front of the neck (voice box). The metabolism of the body is significantly influenced by the thyroid. The balance of calcium in the body is controlled in part by the parathyroid glands.
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Answer:
Hormones
endocrine
pituitary
adrenal
less
prostaglandins
thyroid
Steroidal hormones enter the cell directly and interact with DNA inside the nucleus. These hormones change gene expression, affecting the RNA that is produced and the proteins that are translated in a cell. Nonsteroid hormones do not enter the cell. Instead, they bind to specific receptors on the outside of the cell membrane. This triggers molecules called secondary messengers, such as cAMP, to begin their work of relaying information in the cell, where other chemicals, messengers, and proteins are involved to create a cellular response.
Explanation:pf
In terms of energy, which of these would be directly available to the consumer?
heat
respiration
egested waste
biomass
Answer:heat
Explanation: