Neurons are classified into three types according to the ______________

______ the impulse travels.

I believe it'd be on the Prime Meridian

Answer:

The correct answer is on the prime meridian.

Explanation:

Antarctica is the southernmost continent which is one of the coldest places on the earth.

The prime meridian is an imaginary line of longitude which divides the earth in the western and eastern hemisphere. the longitude at the prime meridian is 0° with a length of 20,000 km from pole to pole.

In northern hemisphere passes through countries like the UK, France, Spain and many others but in the southern hemisphere, it passes through only Antarctica continent.

Thus, option on the prime meridian is the correct answer.

We have been given that different tissue samples are in their respective stage  of cell cycle.

Ans is option B because cancerous cells tend to divide indefinitely regardless of the presence or absence of growth factors. In cancerous cells G0 check points fail and the cells are always in some stage of mitosis i.e. cell is supposed to be in any of the following stages of mitosis :

1) Prophase

2) Metaphase

3) Anaphase

4) Telophase

D) Samples A & C indicate cancer due to the large proportion of cells in some stage of mitosis compared to the cells in interphase.  

Sample: Number of Cells in Interphase Number of Cells in Prophase Number of Cells in Metaphase Number of Cells in Anaphase Number of Cells in Telophase

Sample A 6 15 4 7 8

Sample B 25 4 2 3 1

Sample C 4 9 5 3 6

Answer:

Mitochondrial DNA typing is a method used by forensic scientists which match the DNA of unknown sample to the sample collected from the crime scene.

This typing method posses several advantages over other nuclear DNA typing methods in forensic science as:

Thus, mitochondrial DNA typing has several advantages in forensic science.

Mitochondrial DNA (mtDNA) typing is a valuable tool used in forensic science for identifying  individuals and establishing maternal relationships.

Unlike nuclear DNA, which is inherited from both parents and is unique to each individual (except for identical twins), mtDNA is inherited solely from the mother and is passed down unchanged from generation to generation. This unique inheritance pattern makes mtDNA analysis particularly useful in certain forensic scenarios.

In cases where human remains are found and conventional methods of identification, such as fingerprinting or dental records, are not feasible, mtDNA analysis can be used to identify the deceased.

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Ebola virus disease is a rare and deadly diseases in people and nonhuman primates.

Scientific methods are very important for experiments and to explore hypothesis.

Without it we wouldnt even know what the moon is or other planets in this galaxy, scientific method is important to explore and learn the beauty of this planet and galaxy

The answer is Gene Pool. :)

The scenario described is most likely a result of massive volcanic eruptions that expel aerosols into the atmosphere, blocking sunlight and causing a drop in global temperatures, as demonstrated by the 1991 eruption of Mt. Pinatubo.

The hypothetical scenario described where a huge volume of suspended particles in the atmosphere lead to a blocking of sunlight, reduction in solar radiation, drop in mean global temperatures, and some life forms becoming extinct, could be the result of massive volcanic eruptions. Volcanic eruptions can eject aerosols, such as sulfate particles, into the atmosphere which reflect sunlight and reduce the amount reaching Earth's surface. This has been observed in past events like the eruption of Mt. Pinatubo in 1991, which directly led to a decrease in global temperatures. While decreased solar activity has been considered, there is no conclusive model that connects it to cooler temperatures on Earth. In contrast, the role of aerosols from volcanic eruptions in cooling the planet is well-documented.

The major evidence that the evolution is still ongoing is mutations that occur. Those changes at gene level happen by chance during the process of copying DNA and change through the populations over time. Individuals who reproduced can pass that mutation to their offspring. When carriers with a specific mutation are better able to survive and reproduce, natural selection will favor them. That is the way of new variant to be passed down and spread through the population.

Water is important for maintaining good health because it is involved in many of the body's functions. Dehydration can occur when the body does not get enough water.

Here are some of the ways in which water helps to keep us healthy:

Regulates body temperature: By transferring heat away from the body's center and evaporating off the skin, water helps to control body temperature.

Moistens tissues: Water helps to keep tissues wet, including those in the mouth, nose, eyes, and throat. By doing this, you can keep them from drying out and being itchy.

Protects organs and tissues: By cushioning organs and tissues and keeping them from rubbing against one another, water helps to protect them.

Carries nutrients and oxygen to cells: Water helps the body's cells transport nutrients and oxygen by carrying these substances to them.

Removes waste products: Urination, sweating, and bowel motions are ways in which water aids in the removal of waste from the body.

Lubricates joints: Water aids in lubricating joints, which helps to lessen friction and discomfort.

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1) could improve the delivery of oxygen to the muscles

Because such blood cells carry oxygen from the lungs to the muscles, a higher concentration in the blood can improve an athlete’s aerobic capacity and endurance.

Blood doping can enhance the delivery of oxygen and nutrients to cells and encourage the healing of muscles, potentially improving athletic performance. However, it is illegal and can have serious health consequences.

An athlete might believe that there is a benefit to blood doping with red blood cells for several reasons. Firstly, blood doping could improve the delivery of oxygen to the muscles. This is due to the main function of red blood cells (RBCs) which have a protein called hemoglobin, capable of carrying up to a billion molecules of oxygen per cell. This oxygen can then be used by muscles for aerobic respiration, enhancing the athlete's performance.

Secondly, blood doping could potentially help deliver necessary nutrient molecules to the cells. The additional RBCs will carry not only oxygen, but also other nutrient molecules needed for cell functioning. However, it's important to note that this practice is considered illegal in virtually all sports.

Finally, substances like erythropoietin (EPO) and human growth hormone (hGH) can be used as part of a blood doping strategy, as they stimulate the production of RBCs and promote the healing of muscles respectively. However, misuse can result in severe health consequences including infections and even death.

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The answer is A. Small weeds began to grow and develop

some cyano bacteria  carry out the convertion of gasious nitrogen to biological useful form of nitrogen .

Answer:  The correct answer is:  

__________________________________________________

                    " nitrogen-fixing " .

__________________________________________________

      " Nitrogen-fixing bacteria carry out the conversion of [gaseous nitrogen] to [biologically useful form of nitrogen.]. "

__________________________________________________

Hope this helps!

    Best wishes to you in your academic endeavors

             — and within the "Brainly" community!

__________________________________________________

A because this is where the pollen is. so when bugs stand on here they take the pollen somewhere else and by accident they spread it. I hope this helps :}

Flowers reproduce sexually through pollination. Flowers have male stamens and female pistils. The component of the stamen known as the anther is the part that houses the pollen grains. Therefore, option (A) is correct.

Pollination is the process that allows flowering plants to carry out their sexual reproduction.

In flowering plants, sexual reproduction requires the development of distinct male and female gametophytes, which are responsible for the production of gametes. Pollen grains, which are male gametophytes, are produced by the anthers of the plant. The grains of pollen adhere to the stigma at the top of a carpel, which is the part of the reproductive structure that contains the female gametophytes (ovules).

Therefore, option (A) is correct.

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The correct answer is: b) directional selection

Directional selection is a type of natural selection in which an extreme phenotype is favored over other phenotypes. In this case, phenotype of large crickets will be favored, because they cannot be eaten by lizards. Large crickets are advantageous in surviving and reproduction. This will cause the allele frequency to shift over time in the direction of that large size phenotype.

Answer:

b) Directional selection  

Explanation:

Direction selection is the phenomenon in which a population’s genetic variance changes with respect to environmental changes to select a new phenotype. In this case, the size of cricket, the food source acts as the selection factor for the phenotype, the size of the lizard’s mouth.  

In order to accommodate the food source, a single phenotype of mouth size changes and the respective allele is favoured. Correspondingly, the allele frequency will shift unilaterally in one direction only.  

The increased frequency of the particular allele ensures a higher survival rate of the lizard. The population evolves towards the favoured phenotype.

The carbon cycle explains how carbon travels between the atmosphere, biosphere, hydrosphere, and geosphere. This complex cycle involves rapid carbon exchanges amongst living organisms and slow, long-term exchanges via geological processes. The increased use of fossil fuels has also contributed to increases in atmospheric carbon dioxide, impacting climate change.

The carbon cycle describes how carbon moves through the atmosphere, biosphere, hydrosphere, and geosphere. Carbon is the fourth most abundant element in living organisms and plays a crucial role in the structure of macromolecules. The carbon cycle is a complex process that can be studied as two interconnected sub-cycles: one dealing with the rapid carbon exchange among living organisms and the other dealing with the slow, long-term cycling of carbon through geologic processes.

Carbon is stored in carbon reservoirs which includes the atmosphere, bodies of liquid water (mostly oceans), ocean sediment, soil, land sediments (including fossil fuels), and the Earth's interior. Living organisms are also part of the carbon cycle through the exchange of carbon dioxide between autotrophs (which need carbon for photosynthesis) and heterotrophs (which release carbon dioxide).

Fossil fuels, which are a form of stored carbon, have been increasingly used since the Industrial Revolution, resulting in an increase in atmospheric carbon dioxide, a factor associated with climate change.

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The Carbon Cycle describes the movement of carbon through the atmosphere, biosphere, hydrosphere, and geosphere. It involves two interconnected sub-cycles related to living organisms and geologic processes, and includes the involvement of autotrophs and heterotrophs in a continuous exchange of carbon dioxide and oxygen. The increase in carbon dioxide due to burning of fossil fuels since the Industrial Revolution is a major environmental concern worldwide.

The phrase which describes how carbon moves through the atmosphere, biosphere, hydrosphere, and geosphere is the Carbon Cycle. This cycle involves two interconnected sub-cycles: one dealing with rapid carbon exchange among living organisms, and the other handling the long-term cycling of carbon through geological processes. Carbon is stored for lengthy periods in carbon reservoirs which include the atmosphere, bodies of liquid water (mostly oceans), ocean sediment, soil, land sediments, including fossil fuels, and Earth's interior.

Partners in the biological aspect of the carbon cycle are the autotrophs and the heterotrophs. Autotrophs build high-energy carbon compounds, and heterotrophs acquire these compounds by consuming autotrophs. The cycle also involves a constant exchange of oxygen and carbon dioxide between the autotrophs and heterotrophs, connecting all living organisms on Earth.

On a global scale, the burning of fossil fuels since the start of the Industrial Revolution has significantly increased the amount of carbon dioxide in our atmosphere. The rise in carbon dioxide levels has been linked to climate change and is a leading environmental concern all over the world.

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Answer: A form of asexual reproduction used by bacteria

Explanation:

Binary fission is a form of asexual reproduction used by bacteria to carry out cell division. The results is the cell division used as a method of propagation of the original cell to produce two new cells. The bacteria duplicates its genetic material and then divides into two parts, with each new organism receiving one copy of it. So binary fission creates identical daughter cells.

The steps involved are:

In biology, diffusion is the movement of substances with the concentration gradient, which means they move from an area of high concentration to an area of low concentration. Facilitated diffusion is diffusion that is performed with the help of a carrier protein that can move particles of the substance.

Answer:

When the molecules size are large, and they are insoluble in lipids, at this time facilitated diffusion is necessary to transport such molecules across the plasma membrane.

Explanation:

Facilitated diffusion is one type of passive transport. It occurs from higher concentration to lower concentration. This diffusion depends on the size of the particle, the solubility of the membrane. The smaller size particles can move faster across the membrane but the bigger particles can't pass the plasma membrane. Another fact is the entire plasma membrane is made up of lipids. It can't allow the lipid insoluble particles to the membrane. For this, there is a special facility to carry such polar molecules like water, such as channels, carrier proteins, porins. These channels facilitate the bigger polar molecules to enter into the membrane and cross the membrane. The enzymes like permease act as channel proteins that bind with the bigger particles and carry them through the channels. This type of diffusion also needs ATP like passive diffusion.

To produce an electric current, three things are needed: a supply of electric charges (electrons) which are free to flow, some form of push to move the charges through the circuit and a pathway to carry the charges. The pathway to carry the charges is usually a copper wire.

Answer: The correct answer is "electromotive force".

Explanation:

If the battery is connected to the conductor which makes the flow of the electric charge. Battery forces the charges to flow. The rate of flow of charges constitutes the electric current.

The electromotive force is required for an electric charge to flow through a wire. Here, it is provided by the battery.

Battery allows the flow of electrons between cathode and anode. The cathode is at lower potential and the anode is at higher potential. The charges flow from lower potential to the higher potential.

Therefore, battery is required which provides electromotive force for an electric charges to flow through a wire.

The human body is made up of trillions of cells. Cells of the nervous system, called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. The human brain has approximately 86 billion neurons. To learn how neurons carry messages, read about the action potential.

Neurons come in many different shapes and sizes. Some of the smallest neurons have cell bodies that are only 4 microns wide. Some of the biggest neurons have cell bodies that are 100 microns wide. (Remember that 1 micron is equal to one thousandth of a millimeter!).

Neurons are similar to other cells in the body because:

Neurons are surrounded by a cell membrane.

Neurons have a nucleus that contains genes.

Neurons contain cytoplasm, mitochondria and other organelles.

Neurons carry out basic cellular processes such as protein synthesis and energy production.

However, neurons differ from other cells in the body because:

Neurons have specialize cell parts called dendrites and axons. Dendrites bring electrical signals to the cell body and axons take information away from the cell body.

Neurons communicate with each other through an electrochemical process.

Neurons contain some specialized structures (for example, synapses) and chemicals (for example, neurotransmitters).

The Neuron

neuron

One way to classify neurons is by the number of extensions that extend from the neuron's cell body (soma).

bipolar neuron

Bipolar neurons have two processes extending from the cell body (examples: retinal cells, olfactory epithelium cells).

Pseudounipolar cells (example: dorsal root ganglion cells). Actually, these cells have 2 axons rather than an axon and dendrite. One axon extends centrally toward the spinal cord, the other axon extends toward the skin or muscle.

Multipolar neurons have many processes that extend from the cell body. However, each neuron has only one axon (examples: spinal motor neurons, pyramidal neurons, Purkinje cells).

Neurons can also be classified by the direction that they send information.

Sensory (or afferent) neurons: send information from sensory receptors (e.g., in skin, eyes, nose, tongue, ears) TOWARD the central nervous system.

Motor (or efferent) neurons: send information AWAY from the central nervous system to muscles or glands.

Interneurons: send information between sensory neurons and motor neurons. Most interneurons are located in the central nervous system.

Check out the Gallery of Neurons to see some pictures of real neurons or "Sidewalk Cells" to see photographs of neurons on the street.

Hear It

"Neuron" | "Axon" | "Dendrite" |

"Nissl" | "Mitochondria" | "Endoplasmic reticulum"

There are several differences between axons and dendrites:

because a glucose molecule is to large to pass through a cell membrane cells assist glucose diffusion through facilitated diffusion and two types of active transport.

The process of facilitated diffusion is most likely used to transport glucose into muscle cells as it does not use energy and is helped along by specific carrier proteins in the cell membrane.

The process most likely used to transport glucose into a muscle cell is facilitated diffusion. This process involves specific carrier proteins in the cell membrane that bind to glucose to allow its passage into the cell. These proteins are used because, even though glucose is small in nature, the polar hydroxyl groups (-OH) attached to the glucose molecule prevent it from easily passing through the nonpolar lipid bilayer of the cell membrane.

The process does not require energy as facilitated diffusion is a type of passive transport, moving from a higher concentration (outside the cell) to a lower concentration (inside the cell). Thus, glucose can enter most body tissues, including muscle cells, without the use of energy.

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They are bacteria/single-celled organisms.

Answer:

Np

Explanation:

They have a plasma membrane and cytoplasm

Answer:

A

Explanation:

we know thay the earths mantle is a semi solid and the outer core is a liquid, and the difference in densities, size, boundaries etc because of the behavior of certain seismic waves

Photosynthesis occurs in the chloroplast, with the first stage, the light-dependent reactions, happening in the thylakoid membrane, and the second stage, the Calvin cycle, happening in the stroma. The thylakoid membrane is where sunlight is converted into ATP and NADPH, while the stroma is where these compounds are used to make GA3P from CO₂.

Photosynthesis, the process of converting sunlight into chemical energy, takes place in the chloroplast, an organelle found in plant and algal cells. The process involves two main stages, both occurring in different parts of the chloroplast.

The first stage, the light-dependent reactions, take place in the thylakoid membrane. These reactions use the energy from sunlight to produce ATP and NADPH. The thylakoid membrane is a highly dynamic collection of folded membrane sacs. It's where the green photosynthetic pigment, chlorophyll, is found.

The second stage is the Calvin cycle, which occurs in the stroma of the chloroplast. The stroma is a gel-like fluid inside the chloroplast where the energy derived from ATP and NADPH is used to synthesize GA3P from CO₂.

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25) D hypertonic

23) active transport

Those are the ones I know (sorry I couldn't help with the other ones... I'm studying for my exam) ^-^

The nuclear envelope, also known as the nuclear membrane, [a] is made up of two lipid bilayer membranes which in eukaryotic cells surrounds the nucleus, which encases the genetic material. The nuclear envelope consists of two lipid bilayer membranes, an inner nuclear membrane, and an outer nuclear membrane. The space between the membranes is called the perinuclear space.

I think is D 2 dimensional coordinate point I’m not sure though

Answer:

Option D

(6, -3) is an example of a 2-dimensional coordinate point

Explanation:

In a two dimensional plane, every point is referenced with two coordinates, that is, an x-coordinate and a y-coordinate as follows: (x-coordinate, y-coordinate); in this case, the x-coordinate is 6 and the y-coordinate is -3.

I think the answer is A

Answer:

D

Explanation:

A scatter plot, unlike a line graph which is connected by joining various dots to form the line, and hence to be able to gather the information by studying the pattern of line, is different in this sense.

One needs to study two different sets of Data in a scatter graph. The word scatter itself inclines us to the idea of knowing that all the information in this plot will not be found in one place like in the line graph. One has to compare information derived from data collection to another data collection in a scatter plot.

Note: Both have the Y and The X axis.

The correct options are:

Anything which has mass and occupies shape is a matter. Matter is composed of particles. The particles of matter are very small in size and they  attract each other. There is space between the particles. The particles are in continuous random motion, thus they have kinetic energy. on absorbing energy their movement increases.  

Answer:

B + C +D

Explanation:

B) Matter is made of small particles.

C) Matter's particles are in constant random motion or vibration.

D) There is empty space between matter's particles.

(P.S. I just took a test on this and got it correct.)

When a population reaches its carrying capacity, it has hit the maximum population size that the environment can sustain, causing growth to slow or stop.

At carrying capacity, population growth slows down significantly or stops, due to limitations in resources such as food, space, and other necessities. If a population grows beyond its carrying capacity, resources become overused and the environment cannot support the increased numbers, which typically leads to an increase in death rates and decrease in birth rates until the population size reduces to or fluctuates around the carrying capacity.

In environments with unlimited resources, populations might exhibit exponential growth, but this cannot continue indefinitely in a real-world setting. When resources start to become scarce, the growth follows a logistic growth curve, creating an S-shaped curve as the population growth rate levels off at the carrying capacity. If the population overshoots its carrying capacity, it may experience a population decline until it stabilizes around the carrying capacity again.