A pencil "lead" is actually made of graphite. Graphite is
made exclusively of carbon atoms.
Which two terms best describe graphite?
A. Compound
B. Mixture
C. Pure substance
D. Element
HURRY PLEASE

Answer:

Opposite poles close together.

Explanation:

When you place the north pole of one magnet near the south pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other (north to north or south to south), they will repel each other.

There are two types of cell reproduction processes: mitosis and meiosis. In mitosis, a cell divides into two identical daughter cells, each with a diploid set of chromosomes. Mitosis occurs during the growth and repair of body tissues.  

The advantage of mitosis is that it produces identical cells for tissue repair and growth. The disadvantage is that it does not produce genetic diversity. The advantage of meiosis is that it creates genetic diversity, which increases the chances of producing offspring with favorable traits. The disadvantage is that it requires two rounds of cell division, which increases the risk of genetic errors.

If a patient experiences problems with cell repair, it could affect mitosis and slow down tissue regeneration. If a child's reproductive development malfunctions, it could affect meiosis and result in abnormal chromosome numbers or genetic disorders. Alterations in haploid and diploid cell development can also lead to infertility or developmental abnormalities.

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If the ras protein, a G-protein, is unable to break down GTP and reverts to its inactive form, then the phosphorylation cascade would stop. The answer is d. The phosphorylation cascade would stop.

Ras protein is a small G protein. It is a family of small, membrane-bound GTPases that transmit signals within cells.

The proteins get their name from the fact that they bind to guanosine nucleotides, with GTP being the most important. G proteins, which function as molecular switches inside cells, are a type of signaling molecule.

When G proteins bind to guanosine triphosphate (GTP), they become active. When they bind to guanosine diphosphate (GDP), they become inactive.

They bind and hydrolyze GTP, which is a phosphate-containing guanine nucleotide, to regulate the activation of other signaling proteins.

For G proteins to stop working, GTP must be broken down. If the ras protein, a G-protein, cannot break down GTP and reverts to its inactive form, the phosphorylation cascade would stop.

So, it would stop the ras pathway from sending signals, which would stop further cell growth and differentiation.

So, the answer is d. The phosphorylation cascade would stop.

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Meth is typically detectable in urine for up to 72 hours after the last dose. Because methamphetamine metabolizes to amphetamine, both drugs are likely to show up on a drug test.

The typical detection window for stimulants of the amphetamine type in urine is 3 to 5 days following the last administration.

In heavy, chronic users, this period might be longer; it might be seen in the urine for as long as a week.

Tests on the hair, blood, and oral fluids can also be used to identify meth users. For detecting recent ingestion, blood and oral fluid testing can be more effective and precise than urine testing, but both have shorter detection windows than urine testing. Depending on the type of hair test utilized, meth can be detected up to 90 days after the last use. Clinical or workplace testing typically do not use it because they are more appropriate for forensic or research study testing.

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Answer:

D

Explanation:

Answer:

d i just took the test

Explanation:

Answer:50% chance, and the genotype would be heterozygous

Explanation:

G=gray r=black

      G     r

G   GG   Gr

r     Gr    rr

The inability of a sperm cell from one species to penetrate the egg of another species is known as Gametic isolation.

Gametic isolation is known to occurs when sperm from one species cannot fertilize the eggs of another species.

It is noted that in many species, the sperm cells and eggs have special proteins on their surfaces that must bind together for fertilization to occur.

If the proteins do not match due to species differences, the sperm cannot penetrate the egg, preventing fertilization.

This serves to maintain the separation of species and prevent the production of hybrid offspring that may not be viable or fertile.

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Answer:

No competition.

No predators.

And a big environment.

Explanation:

If I need to give more detail, tell me and I will.

Answer:

In solids, particles have greater amount of attractive forces, they have fixed shapes and less energy.

In liquids, particles have weak forces of attraction b\w them, they take the shape of their container and have more energy. The often slide pass each other.

In gases, particles have almost no amount of attractive forces, they have no fixed shape and much more energy. They can move freely .

In my opinion that would be a wolf spider. I will check online to see for you :)

Wolf spiders deadly:3/10

Cant hurt humans

Causes rash or itching

Answer:

I hope this helps a little bit.

An newborn is born with 45, 47, 48, or even 49 chromosomes instead of the typical 46 chromosomes approximately once every        166           births.

What Does It Mean When a Baby Is Born With an Extra Chromosome?

Pregnancy is a vulnerable time when your unborn child may be exposed to a number of illnesses. However, several anatomical anomalies that are typically harmful and can lead to difficulties in babies may be present in infants with additional chromosomes.

A human cell contains 46 chromosomes, 23 of which are inherited from each parent. However, in some circumstances, either parent's chromosomes may have been added to or deleted from the growing fetus.

If you are unaware of this genetic phenomena and are interested in learning more, read this post to learn about the potential origins, illnesses, symptoms, and other details about extra chromosomes in newborns.

What Does It Mean When a Baby Is Born With an Extra Chromosome?

Genes are strung like beads along chromosomes, which are threadlike structures. The 47th chromosome in human cells is an additional chromosome. As a result, a child with an additional chromosome will have 23 pairs of chromosomes overall (one from the mother and two from the father or vice versa). Trisomy, which stands for "three bodies," is the term used to describe this disorder.

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Peristalsis and segmentation are processes that occur in the gastrointestinal tract during the digestive process.

Let's explore each process in detail:Peristalsis: Peristalsis is the process by which food is propelled through the digestive tract. In this process, muscular contractions occur in the walls of the gastrointestinal tract, pushing food forward from one segment of the digestive system to the next. Segmentation: Segmentation is the process by which food is mixed and broken down into smaller pieces in the digestive tract. In this process, muscular contractions occur in the walls of the gastrointestinal tract, causing the food to be mixed and churned in the stomach and small intestine. Peristalsis occurs throughout the digestive tract, starting from the esophagus and continuing all the way through to the anus. Segmentation primarily occurs in the stomach and small intestine, where it helps to mix food with digestive enzymes and break it down into smaller pieces that can be more easily absorbed by the body.

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Answer:

Polyunsaturated fats

Explanation:

Based on scientific evidence, replacing saturated fat with polyunsaturated fats significantly reduces total and LDL cholesterol in the blood, which is present in Option D, and the polyunsaturated fats are found in foods like fatty fish, nuts, and seeds.

It is a type of unsaturated fat that contains more than one double bond, when these fats are used to replace saturated fats in the diet, they can help lower total and LDL cholesterol levels in the blood and reduce the level of cardiac diseases, blood vessel-related diseases, etc, polyunsaturated fats contain omega-3 and omega-6 fatty acids, which have been found to have heart-protective effects.

Hence, replacing saturated fat with polyunsaturated fats significantly reduces total and LDL cholesterol in the blood, which is present in Option D.

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Answer:

Here are some explanations from 0nline so if you want rewrite in your own words

hope this helps  :))

blood glucose-

"The control of blood sugar (glucose) by insulin is a good example of a negative feedback mechanism. When blood sugar rises, receptors in the body sense a change. In turn, the control center (pancreas) secretes insulin into the blood effectively lowering blood sugar levels."

"If the blood glucose level is too low, the pancreas releases the hormone glucagon. This travels to the liver in the blood and causes the break-down of glycogen into glucose. The glucose enters the blood stream and glucose levels increase back to normal. This is an example of negative feedback."

body temperature-

" Body temperature is regulated by negative feedback. The stimulus is when the body temperature exceeds 37 degrees Celsius, the sensors are the nerve cells with endings in the skin and brain, the control is the temperature regulatory center in the brain, and the effector is the sweat glands throughout the body."

"Body temperature is controlled by the hypothalamus in the brain. If the hypothalamus detects that the body is too hot, the response is that the body begins to sweat to try and reduce the temperature back to the correct level."

"Negative feedback (or balancing feedback) occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances."

"Negative feedback brings a system back to its level of normal functioning. Adjustments of blood pressure, metabolism, and body temperature are all negative feedback"

The open-economy macroeconomic model predicts that a government default on its debt can lead to a decrease in the value of the country's currency and an increase in interest rates.

This can lead to a reduction in investment and economic activity, as well as inflationary pressures.

Specifically for Argentina in 2002, the default led to a sharp depreciation of the peso, high inflation rates, and a contraction in economic activity.

Overall, the consequences of a government default on its debt can be severe, and can have a significant impact on the country's economy. It is important for governments to manage their debt levels and ensure that they have a sustainable fiscal position.

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Answer:

Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density.

Answer:

A. provide structure and protection

hope it helps

Answer:

See the answer below

Explanation:

From the graph, the concentration of salt solution where the number of burst red blood cells equals the number of intact ones is 0.40 g/100 cm3.

At this concentration, the percentage of burst cells is 50, meaning that the remaining 50% of the cells in the experiment remained intact.

The totality of the concentrations of all the salt solutions used is:

0.30+0.35+0.40+0.45+0.50 = 2 g/100 cm3

Thus, the percentage of salt solution concentration when the number of red blood cells that burst is the same as the number of red blood cells that do not burst equals;

          0.40/2 x 100% = 20%

Answer:

Biological evolution, simply put, is descent with modification. This definition encompasses small-scale evolution (changes in gene frequency in a population from one generation to the next) and large-scale evolution (the descent of different species from a common ancestor over many generations).

Explanation:

The burning of fossil fuels negatively impacts ecosystems in that it creates air pollution and acid rain, produces nitrogen oxide gases that deplete Earth's protective ozone layer, increases greenhouse gases in the atmosphere, and causes global climate change. B, D, and E are the correct options.

The burning of fossil fuels, such as coal, oil, and gas, releases a variety of pollutants into the environment. One of the most significant impacts is the release of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere. These compounds can react with water and air to form acid rain, which can have harmful effects on both terrestrial and aquatic ecosystems.

Hence, the correct answers are It creates air pollution and acid rain, produces nitrogen oxide gases that deplete Earth's protective ozone layer, increases greenhouse gases in the atmosphere, and causes global climate change. B, D, and E are the correct options.

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Answer:

where is the statement to answer the question

Answer:

help plzxzuhvfgggugyu

Very windy conditions occur when isobars are close together; calmer conditions occur when they are farther apart. Always in a clockwise orientation, the wind blows around highs.

As seen on the left-hand side of the above image, isobars, usually lines of equal pressure, are the lines surrounding high and low tension on a weather map. The wind speed increases when isobars are near together and decreases when they are farther apart.

The wind is blowing in a downward direction, crossing the isobars. Surface friction causes this to happen. Because a decreasing wind is less affected by Coriolis, friction slows the wind, which prevents the pressure gradient pressure and coriolis force from being equal.

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Answer:

not sure if its right but here's what I put, hope this can help someone!

Explanation:

Answer:

the answer is D) earthquakes

Explanation:

soil erosion involves taking away of the top layer of the soil.... as for earthquakes.. these are caused by tilting and sliding of tectonic plates of which soil erosion takes no place in causing such actions

Answer:

Option D) Earthquakes.

Is your answer.

Explanation:

Hope you have a great day.

Answer:

turtles, fishes, birds, whales, cats, dogs, really any animal can be affected

Explanation:

(any animal in the ocean) mark as brainliest plz

CO2 AND CH4 are both common

The Needham experiment was replicated in the Spallanzani experiment, albeit with a few significant modifications.

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Answer:

cloud electron