From the neck to the feet, the somatic motor system's major motor activity is controlled by the corticospinal tract. The main spinal route that is engaged in voluntary movements is this one.
The soma of pyramidal neurons are found in cortical layer V, where the tract starts in the primary motor cortex.The premotor, primary motor, and primary sensory cortexes give rise to pyramid-shaped cells that make up the corticospinal tract, which is engaged in skilled voluntary activity.Pyramidal cells in layer V of the cerebral cortex are the source of the nerve fibers of the corticospinal tract. About 30% of fibers come from the primary motor cortex, along with similar amounts from the supplementary motor region and the premotor cortex. The remaining 40% comes from the somatosensory cortex, parietal lobe, and cingulate gyrus.
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The unique shape of a salt crystal is due to ________.
A. the structure of the NaCl molecule
B. the amount of water that is added to the salt to form the crystal
C. the angle of the surface on which the crystal is formed
D. the temperature at which the salt is dissolved in water.
The unique shape of a salt crystal is due to the amount of water that is added to the salt to form the crystal. Option B.
In crystallography or crystallography, such crystals are called cubic crystals. This shape is determined by the way the individual atoms of the salt are packed together. This is the same way that the shape of a bunch of oranges is determined by the way they are stacked together. Salt is a flavor enhancer, bringing out the desired flavor of other foods, thus adding its own flavor.
Rock salt is an ionic compound that occurs naturally as white crystals. It originates from the mineral form rock salt or the evaporation of seawater. The structure of NaCl is formed by repeating face-centered cubic unit cells. The salt crystals are clearly cubic, but some particles appear to have overlapping cubes. Makes rich foods richer meaty foods thicker and enhances bitterness.
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A cell containing 12 replicated chromosomes at the beginning of mitosis will have how many chromosomes after the completion of mitosis?.
A cell containing 12 replicated chromosomes at the beginning of mitosis will have how many chromosomes after the completion of mitosis
What is mitosis ?When a parent cell divides into two identical daughter cells, a process known as mitosis, which involves nuclear division, takes place.
Twelve chromosomes are present in the G1 phase. The amount of DNA doubles during the S phase of the cell cycle. The number of chromosomes does not change despite the chromatids doubling. In the G2 phase, there will be the same 12 chromosomes as in the S phase, and there will be 24 chromatids.In mitosis, cells duplicate themselves exactly. As an illustration, it produces new skin cells to replace old ones. The reproductive cells required are called gametes. They do not undergo mitosis like other cells do.Learn more about Mitosis here:
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When you draw an image that you see using a microscope, why is it important to write the
magnification used next to the drawing?
Only when it is possible to see more details of an object in the image than when observing the object with the unaided eye does magnification serve a useful purpose.
What is importance of magnfication? When sketching large specimens without the assistance of a microscope, it is helpful to indicate the drawing's scale and magnification. For example, a plant's or leaf's true sizeFor instance, it could be difficult to draw conclusions from a drawing alone.If the actual size or magnification for drawings done with a microscope is not stated, it may be helpful to simply state whether a low or high power lens was used. Preferably, this information should be included directly below the drawing's title.For more information on magnification kindly visit to
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Which part of the skin is made up of elastic and fibrous tissue as well as fatty tissue?.
Dermis is part of the skin is made up of elastic and fibrous tissue as well as fatty tissue.
Dermis is a fibrous structure composed of collagen, elastic tissue, and other extracellular components like nerve endings, hair follicles. The role of the dermis is to support and protect the skin and deeper layers, also assist in thermoregulation.
Dermis is the core skin and is composed of connective tissue. It is located internally, under the epidermis. The dermis is classified as highly vascularized tissue, containing blood and lymph vessels, as well as nerves, hair follicles, and sweat glands.
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item 7 although 61 different codons code for amino acids, cells contain fewer than 61 different trnas. why?
One reason for this is that some amino acids are encoded by multiple codons. For example, the amino acid glycine can be encoded by four different codons: GGU, GGC, GGA, and GGG. So, even though there are 61 codons, there are only 20 amino acids that they can encode for.
Another reason is that not all codons are used equally. Some codons are used much more frequently than others. For example, the codon UUU codes for the amino acid phenylalanine, but this codon is used much less frequently than the codon UUA, which also codes for phenylalanine. So, even though there are 61 codons, the number of different tRNAs that are needed is much smaller.
There are numerous reasons why cells might contain fewer than 61 different tRNAs. One possibility is that some amino acids are encoded by multiple codons, so a single tRNA can recognize and attach to multiple codons. Another possibility is that some tRNAs are promiscuous, meaning they can recognize and attach to multiple codons. Finally, it's also possible that some codons are simply not used by cells, so there is no need for a tRNA to recognize and attach to them.
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Which statement is true about the theory of plate tectonics and the theory of continental drift?
Responses
The theory of plate tectonics tells exactly where the continents were before Pangaea divided.
The theory of plate tectonics tells exactly where the continents were before Pangaea divided.,
The theory of plate tectonics shows that continental movements could not have happened.
The theory of plate tectonics shows that continental movements could not have happened.
The theory of plate tectonics shows that Pangaea was impossible, but the continents did move.
The theory of plate tectonics shows that Pangaea was impossible, but the continents did move.
The theory of plate tectonics explains how continental movements could occur.
The theory of plate tectonics explains how continental movements could occur.
What is plate tectonic and causes?Volcanic eruptions and earthquakes are both brought on by the shifting of tectonic plates. It is crucial to understand that the Upper mantle is divided into sizable chunks known as tectonic plates. You should keep in mind that tectonic plates are enormous fragments of the Earth's mantle that fit together move over the planet's surface.
How important is plate tectonics?Because of it, the Earth is now habitable. We can't survive underwater, therefore it created the continents on that we now reside. Volcanoes are produced when plates clash and subduct (when one plate slips under another). We believe that this procedure, repeated numerous times, is just what created the continents.
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Where are proteins synthesized in the
cell?
A. nucleolus
B. smooth ER
C. Golgi body
D. ribosome
Answer:Ribosomes
Explanation:Ribosomes are the sites in a cell in which protein synthesis takes place. Cells have many ribosomes, and the exact number depends on how active a particular cell is in synthesizing proteins. For example, rapidly growing cells usually have a large number of ribosomes
Cells remove waste from their cytoplasm by passing it through the cell membrane and out of the cell. What two human body systems perform similar functions?.
Answer:delete it
Explanation:just do it
HELP PLEASE SOS
Match the following vocabulary words with their definitions.
1. atomic particle with a positive charge
2. neutral atomic particle
3. having neither a positive nor a negative electrical charge
4. atomic particle with a negative charge
5. the smallest part of any object
NOIT QUES
neutron
electron
atom
proton
neutral
tendons join muscle to bone. they are subject to severe stressors which usually only occur in one direction, the direction of muscle pull. for this reason, they are made up of:
Muscles and bones are connected by fibrous connective tissue called tendons. Tendons move bones and structures.
What are tendons?The fibrous connective tissue known as a tendon is what anchors muscle to bone in the body. It's also possible for tendons to connect muscles to other structures, such the eyeball. The function of a tendon is to allow the bone or structure to move. The collagen strands that make up fibrous connective tissue are bundled together in parallel fashion.
At one end, the tendon is securely linked to the muscle fibers, and at the other end, it is firmly coupled to the components of the bone. Tendons are responsible for transmitting the mechanical force of muscular contraction to the bones.
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Recall that ecologists are biologists who specialize in the study of how species interact within a population. On this worksheet you will look at some of the things ecologists look at when they study populations. 1. What are some factors that you think ecologists might study when it comes to populations? _______________________________________________________________________. 2. What is growth rate (r)? _______________________________________________________________________. 3. Draw the shape of the graph that the population growth in Victorian England would have reflected:
Population size, density, factors affecting density, and dispersion. After subtracting deaths and births, the percentage growth is known as the net reproductive rate (r). 0.5%/year is the population reproduction rate.
what is The importance of density?We can calculate what materials will float and sink when placed in some kind of a liquid using the concept of density, which is a crucial idea. The rule of thumb is that objects will float as long as its density is lower than the liquid's density.
Definition and illustration of population density.The average of people in a population is expressed as the number of people per unit of area of volume. One bug per square meter, for instance, would be found in a population of 100 insects which occupy a space of 100 square meters.
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The molecule ________________ found in paper is almost identical to the carbohydrate molecule found in mashed potatoes.
The molecule cellulose that we find in the paper is similar to the carbohydrate that mashed potatoes contain.
What is starch?We know that a compound is one that is formed by the combination of two or more molecules. There are various kinds of compound and we tend to segregate them on the basis of the way that the atoms are combined so as to give rise to the molecule.
In this case, we have so many smaller units that are coming together so as to forma a larger unit and the larger unit that have been formed is what we call a polysaccharide since there are very many atoms that are present in it.
Both the paper carbohydrate molecule found in mashed potatoes are composed of glucose monomers and are poly saccharides. And this is the commonality between the two kinds of molecules.
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which of the following is the most accurate definition of perception? the processing of visual stimuli by the brain to give an accurate representation of the view of the world the conscious interpretation of the world around us the detection of the various energy forms in the environment by sensory receptors the detection of stimuli in the internal environment by visceral receptors the detection of stimuli in the external environment by sensory receptors
The best way to define perception is as our conscious interpretation of the world around us. Our ability to recognize and evaluate sensory data is known as perception.
How we react to information is also a part of perception. When we think of perception, we can picture a process where we take in sensory data from our surroundings and use it to interact with them. Various stimuli in our environment are constantly stimulating our sense organs. Our sense organs pick up on many of these stimuli, which are then transformed into sensations. Selecting, organizing, and interpreting stimuli are cognitive tasks that are part of perception.
We can therefore infer that the most accurate definition of perception is our conscious interpretation of the surroundings, which also includes our recognition and understanding of sensory data.
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prey species existing at very high densities, even temporarily, can benefit the prey as a result of:
Because of the satiation of the predator, prey species living in very high concentrations may occasionally be advantageous to them.
What is predator satiation?Predator satiation theory (Janzen, 1976; Silvertown, 1980; Augspurger, 1981) postulates that synchronous reproduction in long-lived species generates more seed than can be devoured by seed predators in mast years, starving them in non-seeding years.
A reproduction strategy in which a prey species creates many individuals in a group or cohort at a time that overwhelms the effect of individual predation by sating all predators and still having a sizable population remaining to maintain the species until the next reproduction event.
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The image shows the wings of two different organisms. The wings of the housefly and the bat are . This indicates that?
Science i the proce ued to anwer quetion about the makeup of the natural world and the way it function
Describe the nature of technology & demonstrate how it can be used to understand the natural world. Differentiate between facts, theories, and hypotheses.
What is meant by natural?Based on the condition of things in nature; created by nature: a natural bridge. existent in or developed by nature (as opposed to artificial): A natural process is growth. of or pertaining to environment or the cosmos: the beauty of nature.
The definition of pure naturalAccording to the FDA, a food is classified "natural" if it contains no artificial or synthetic ingredients (including any colorants regardless of their source) that are not typically anticipated to be included in that food.
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which of the following is/are major nitrogenous wastes of the human body? check all that apply.
a. Uric acid
b. Urea
c. Creatine phosphate
d. Creatine
e. Nucleic acids
Uric acid, Urea and Creatine are major nitrogenous wastes of the human body.
what is nitrogenous waste?Nitrogenous wastes are substances which contain the element nitrogen and these wastes can be converted to urea and then excreted from the body in the form of a concentrated stream of urine.
Urea is the end product because it is easier and safer to expel than waste containing ammonia or uric acid.
Nitrogen-based waste produced from all metabolic processes, or nitrogenous waste can be released in a series of ways.
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according to david garland what is one factor that accounts for why the death penalty exists in the us
according to David garland federal-level policymaking on this issue, instead of state level is one factor that accounts for why the death penalty exists in the united states.
In his book, Garland argues that the death penalty has persisted in America for the same reason it was abolished so early in some states (Michigan banned it in 1846): the country's commitment to a radical form of federalism. Like lynching, perhaps the death penalty persists purely because local legal systems allow it.
Our political framework pushes the ability to rebuff down to state assemblies, nearby examiners, judges, and juries. Because of this local power, some states were able to outlaw the death penalty earlier than other Western nations.
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The taiga is the most extensive biome, stretching west across north america and east to asia. The snowshoe rabbit is a common species found in the taiga biome. Over the last several decades, the average annual temperature of this area has increased, and the long-term deposits of ice and snow have become scarce. How will these abiotic factors impact the snowshoe rabbit population over time?.
The snowshoe rabbit will no longer be able to camouflage itself, thus resulting in a decline in its population due to death by predation.
What are abiotic factors?
Abiotic factors are nonliving components of an ecosystem, such as temperature, light, wind, and moisture. They are the physical and chemical elements of an environment that influence the structure and function of ecosystems. Abiotic factors shape the biotic, or living, components of an ecosystem, which include plants, animals, and microorganisms. Abiotic factors determine what species of life can live in a particular ecosystem. For example, a cold, wet climate will support different species of plants and animals than a hot, dry climate. Abiotic factors also determine the carrying capacity, or the number of organisms that can be supported, of a given environment. Abiotic factors are essential to the functioning of all ecosystems and are constantly changing due to natural processes and human activities.
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breathing is easier in an upright position: a.dyspnea b.hemothorax c.dysphonia d.anosmia e.orthopnea
The condition where breathing is easier in upright position is: (e) orthopnea.
Orthopnea is the condition where a person finds it uneasy or difficult to breathe while lying down. Breathing becomes easier when the person stands or sit down upright. Some other may also be felt along with it like chest pain, tightness, wheezing, coughing, etc.
Breathing is the process of taking air in and expelling out. This is done to take in the oxygen in the air for carrying out the life processes and expelling out the carbon dioxide produced as the by-product. The air is taken in and out by the nostrils and exchange inside the body is mediated by the lungs.
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In ferns, some leaves are "fertile" in that they bear sporangia. What are the structures in gymnosperms that are analogous to a leaf and sporangia? select all that apply.
The structures in Gymnosperms that are comparable to leaves, as well as sporangia of ferns, are (C) cone scales and ovules, (D) cone scale and pollen-producing sporangia.
Sporangia are found in the form of clusters known as 'sori' in certain leaves of ferns.
The question is incomplete. The complete question is:-
In ferns, certain leaves are termed 'fertile' as they carry sporangia. Which structures in Gymnosperms are comparable to leaves as well as sporangia of ferns?
Choose from the options that are given below:-
(A) cones as well as seeds
(B) seed coat as well as embryo
(C) cone scales as well as ovules
(D) cone scale as well as pollen-producing sporangia
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Cacti are plants that live in extremely dry environments. unlike most other plants, cacti do not have regular leaves, but instead, have spines. they do have green stems. How would the lack of regular leaves help cacti survive in their environment? In what part of the cacti would photosynthesis occur?
Answer:
Explanation:
b
If you want to affect chromatin packaging, which amino acid could you mutate to affect both histone acetylation and methylation patterns?.
Lysin affect both histone acetylation and methylation patterns.
Histone methylation is important part of common epigenetic regulations that play key roles in advancement processes and diseases. Methylation of lysine residues in histone proteins determines the active and silent states of surrounding genes by modulating the chromatin structure .
Hence, they plays an crucial role in cell cycle progression and differentiation. Arginine and lysine are the two major amino acids that can be methylated.
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dna does not store the information to synthesize which of the following? view available hint(s)for part b dna does not store the information to synthesize which of the following? dna organelles proteins messenger rna
DNA does not store information from organelles
Protein synthesis is the process of forming protein molecules involving the synthesis of amino acids that occur in the nucleus and ribosomes which are regulated by DNA and RNA. Protein synthesis functions to form and compile proteins that will be utilized in the body.
DNA is the genetic code that contains all the genetic coding used to control the function, behavior and development of a living organism. DNA functions as a carrier of genetic information that will provide genetic instructions for each organism and regulate the process of protein synthesis. DNA stores information from DNA, messenger proteins and RNA.
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What process immediately
and typically follows
telophase and completes the
cell cycle?
A. cytokinesis
B. omegaphase
C. resting phase
Emphysema causes a loss of walls between individual alveoli, resulting in fewer, but larger, alveoli. Which part of gas diffusion would be most affected by emphysema?.
One of the lung conditions brought on by damage to the lungs' air sacs—which lowers the body's capacity to absorb oxygen from the environment—is emphysema. As a result, breathing becomes less efficient because it requires more effort to expel air from the lungs. The fibres that keep the airways open are gradually destroyed by this disease. When someone exhales, this issue leads to the collapse of these channels. That is, the fresh, oxygen-rich air does not enter the lungs because the carbon dioxide-containing air that the lungs release cannot escape.
These sacs' inner walls deteriorate and crack, resulting in wider air gaps and a consequent reduction in the air exchange surface of the cells' lungs.
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A researcher determined that a strain of e. Coli is producing a shortened version of a protein required for glucose metabolism. What type of mutation could be responsible for this shorter than normal protein?.
A researcher determined that a strain of E. coli is producing a shortened version of a protein required for glucose metabolism, and this is due to the premature termination or the nonsense mutation.
What is "premature termination" in translation?The polypeptide chain is produced during the translation process and can be stopped by a variety of factors, such as miRNA attachment to the polypeptide chain or any base mutation. If a single base mutation happens, that changes the codon into a stop codon, which is called a nonsense mutation, and this causes the short version of the protein.
Hence, this is due to the nonsense mutation in the polypeptide chain.
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describe the difficulty encountered in the replication of the ends of linear dna, how this problem is solved, and its relationship with cancer and aging.
Cells struggle to duplicate the ends of linear chromosomes because they need a primer and to have directed polymerases.
Which cancers have a deadly prognosis?Short and sweet. Breast, lung & bronchus, prostate, or colorectal cancer account for over 50% of all new cases of cancer diagnosed in the US. Colorectal, pancreatic, breast, lung, and bronchus cancers account for over 50% of mortality.
Why do healthy individuals get cancer?The primary factors are genetics and particular environmental or behavioral stimuli. According to certain theories, some cancers have a genetic predisposition to develop, making you more likely to contract the illness.
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Doe A biophere conit of all the organim living in an area and the nonliving feature of their environment?
The biosphere is the skinny lifestyles-supporting stratum of Earth's surface, extending from some kilometers into the surroundings to the deep-sea vents of the sea. it's far composed of living organisms and nonliving factors from which the organisms derive electricity and nutrients.
The biosphere is made of the parts of Earth wherein existence exists all ecosystems. The biosphere extends from the deepest root systems of timber to the darkish environments of ocean trenches, to lush rain forests, high mountaintops, and transition zones like this one, in which ocean and terrestrial ecosystems meet.
A biosphere consists of all the organisms living in an area and all of the nonliving functions of their environment. Botanists are scientists who look at the interactions among organisms and their environments. populace density occurs whilst or greater organisms are trying to find an identical resource at an equal time.
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Terrance was in an accident that caused damage to the part of his brain called the cerebellum. Which skill-related component will most likely be affected by this damage?.
Terrance was in an accident that caused damage to the part of his brain called the cerebellum then the skill-related component that will most likely be affected by this damage is : balance.
What happens when cerebellum is damaged?Damage to the cerebellum causes:
coordination loss of of motor movement inability to judge distance inability to perform rapid movements movement tremors staggering and wide based walkingCerebellum is that part of your brain that helps in coordinating and regulating a wide range of functions and processes in your brain and body both.
Cerebellar damage disrupts the brain signals that are responsible for controlling movement, therefore many cerebellar patients have difficulty walking.
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