Bacteria and archaeans do not consist of complex membrane bound organelles in their cell bodies.
The correct option is option c.
A prokaryotic cell is basically a simple as well as single-celled or we can say unicellular organism which lacks a nucleus and any other membrane-bound organelle. Prokaryotic DNA is basically found in the central part of the cell which is a darkened region known as the nucleoid.
Bacteria and archaeans are both relatively small in size when compared to eukaryotic cells. They both are able to reproduce rapidly and lack the presence of a true, well-defined nucleus. They also do not have complex membrane bound organelles.
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What is the Pitx1 gene in stickleback fish?
The Pitx1 gene is a gene found in stickleback fish that is responsible for the development and maintenance of the pelvic fin.
The gene is believed to be involved in the evolution of pelvic fins in stickleback fish, as different variants of the gene have been associated with different fin shapes.utilising the gene Pitx1, which is involved in the growth of pelvic spines in stickleback fish, as an example of eukaryotic gene transcription. They investigate how variations in Pitx1 gene expression might impact bodily growth and discover how such variations can contribute to population evolution under the right selection pressure. They will then develop models that illustrate how Pitx1 gene transcription is controlled in two populations of stickleback fish with various morphologies.
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as sound waves travel into the ear, they pass from the auditory canal to the cochlea duct in what order? tympanic membrane, ear ossicles, oval window, endolymph tympanic membrane, ear ossicles, round window, endolymph tympanic membrane, ear ossicles, oval window, perilymph ear ossicles, tympanic membrane, oval window, perilymph
The sound waves then move in the direction of the eardrum, also known as the tympanic membrane, which is a flexible, oval membrane at the end of the ear canal.
After passing through the external auditory canal on their way to the ear, sound waves hit the eardrum and cause it to vibrate. One of the three tiny bones in the middle ear, the malleus, is connected to the eardrum. It is also referred to as the "hammer" because it sends sound waves to the incus, which then sends them to the stapes.
The oval window is a structure against which the stapes pushes in and out. This action is transferred to the cochlea, a snail-like structure filled with fluid that houses the auditory organ known as the organ of Corti. It is made up of very small hair cells that line the cochlea. Sensory nerves send electrical impulses generated by these cells, which are then translated into vibrations, to the brain.
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in what category are the eicosanoids, based on chemical structure?
The eicosanoids are based on a lipid chemical structure.
Eicosanoids are a class of signaling molecules that play an important role in cellular communication. They are derived from fatty acids and have a lipid chemical structure, specifically a 20-carbon fatty acid called arachidonic acid. This structure allows eicosanoids to easily diffuse through cell membranes and act as signaling molecules in the body. The eicosanoids are involved in a variety of physiological processes, including inflammation, blood pressure regulation, and blood clotting. Because of their lipid structure and biological importance, eicosanoids are classified as lipid-derived signaling molecules.
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What allows passage of chyme from the small intestine to the large intestine?
The passage of chyme from the small intestine to the large intestine is facilitated by the ileocecal valve, which is a muscular sphincter located between the small intestine (ileum) and the large intestine (cecum).
The ileocecal valve prevents backflow of contents from the large intestine into the small intestine. When food moves from the small intestine to the large intestine, the ileocecal valve opens allowing chyme to pass from the small intestine to the large intestine.
The valve opens in response to signals from the enteric nervous system, which is responsible for controlling the digestive process. The ileocecal valve also helps to regulate the passage of chyme, ensuring that the small intestine does not become overloaded with too much material.
In addition, the ileocecal valve helps to maintain an appropriate pH balance in the large intestine, which is important for proper digestion.
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α-strands and the β-helices are the two most common forms of secondary protein structure. (A) True, (B) False
(A) True. Alpha-strands and beta-helices are indeed the two most common forms of secondary protein structure.
Secondary protein structure refers to the local, repeating arrangements of amino acids within a protein that form distinctive patterns and impart specific stability and function to the protein. Alpha-helices are long, coil-like secondary protein structure stabilized by hydrogen bonds between the amide nitrogen and carbonyl oxygen atoms of peptide bonds. Beta-strands, on the other hand, are flat, Alpha-helices extended structures stabilized by hydrogen bonds between the amide nitrogen and carbonyl oxygen atoms of peptide bonds, arranged in a "sheet" formation. These two forms of secondary protein structure serve as building blocks for the formation of more complex tertiary and quaternary structures, Alpha-helices which give rise to the unique 3D shape and function of a protein.
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what type of bonds does carbon typically form to create biomolecules?
Carbon typically forms covalent bonds to create biomolecules.
Covalent bonds occur when two atoms share electrons, forming a strong bond. In biomolecules, carbon typically forms covalent bonds with other elements, such as hydrogen, oxygen, nitrogen, and sulfur, to create complex structures such as carbohydrates, lipids, proteins, and nucleic acids. These covalent bonds allow the formation of large, stable molecules that are essential for life. biomolecules For example, in carbohydrates, carbon forms covalent bonds with hydrogen and oxygen to create sugar biomolecules, which provide energy for cells. In proteins, carbon forms covalent bonds with nitrogen and sulfur to create amino acids, which form the backbone of the protein molecule.
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Compare primary and secondary pollutants. Which is more harmful?
the sorting out, interpretation, analysis, and integration of stimuli by the sense organs and the brain is called _______
The sorting out, analysis, interpretation, as well as the integration of stimuli by the sense organs and also the brain is called perception.
Perception can be basically defined as our recognition, interpretation as well as the analysis of the sensory information around us. Perception also includes how we are able to respond to that information.
We can also say that perception is basically a process where we take in the sensory information present in our environment and we use that information to interact with the same environment. Perception allows us to take in the sensory information in and then make it into something meaningful to act appropriately.
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assuming the population is in hardy-weinberg equilibrium, how many individuals have green hair?
91% of people will have green hair, assuming the population is in Hardy-Weinberg equilibrium.
When is a population in a state of Hardy-Weinberg equilibrium?According to the Hardy-Weinberg equilibrium, if no unfavorable influences exist, genetic variation in a population will remain stable from one generation to the next.
In a chi square test, how can you tell if a population is in Hardy-Weinberg equilibrium?A statistical test called chi-squared is used to examine whether the observed data (o) and the predicted data are equal (e). If five conditions are met—random mating, absence of mutations, absence of gene flow, absence of natural selection, and a large population size—a population for a gene is in Hardy-Weinberg equilibrium.
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The given question is incomplete. The complete question is:
You are given the following information about a population:
• There are two alleles: C and c.
• C codes for green hair and c codes for white hair.
• C is dominant over c.
• The frequency of the c allele is 0.3.
• The population is comprised of 100 individuals.
Assuming the population is in Hardy-Weinberg equilibrium, how many individuals have green hair?
9% of the population will have green hair.
91% of the population will have green hair.
51% of the population will have green hair.
49% of the population will have green hair.
Which factors can prevent permanent fixation of an allele(i.e. maintain genetic diversity)? Hint: You're going to have to try different values than just those presented in the exercise--try to keep both alleles present!Gene FlowGenetic DriftNatural SelectionMutation
An allele's ability to become permanently fixed can be avoided through gene flow and mutation factors (i.e. maintain genetic diversity).
Why doesn't an allele fixate?A fixed allele may only be rendered un-fixed in two ways: either through haphazard mutations that result in the creation of new alleles or through immigration.
How does the genetic diversity of allele fixation?Single alleles will gradually spread through a population if fixation probability is low and fixation period is short, resulting in limited genetic diversity. High fixation probabilities or long fixation times will typically lead to an increase in the number of segregating alleles in a population, which will increase genetic diversity.
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The chemical formula for glucose is CoH12O6. The atomic weights of carbon and oxygen are
more than ten times higher than the atomic weight of hydrogen. Therefore, the source of most
of the mass of a glucose molecule is
(CO2/ H2O/O2)
Answer: Use the diagram to complete the statements.
The measure of angle L is
°.
The trigonometric ratio that uses ∠M and LN to solve for NM is
.
The length of NM, to the nearest tenth, is approximately
.
Explanation:
in terms of mechanism, recessive traits are usually....
a. Non-functional version of the normal ‘wildtype’ protein or enzyme
b. Only expressed in the ‘phenotype’ when two such (recessive) alleles are present.
c. An example of dominant-negative mutations
d. Present in the population - mostly in carries (heterozygous individuals)
The appropriate choice is B. The correct wording is that two of these (recessive) alleles are only expressed in the "phenotype" when they are present.
Characteristics that are recessive tend to be less obvious than dominant ones. They depend on two copies of the same gene to be expressed and are handed along from parents to offspring through genes. Blue eyes, detached earlobes, and specific blood types are examples of recessive characteristics. Humans can exhibit recessive features including Widow's peak, free earlobes, Hitchhiker's thumb dimples, tongue rolling, cleft chin, blue eyes, blond hair, albinism, baldness, curly hair, dimpled chin, and brown eyes. When a single gene is inherited from either parent, dominant traits are those that are expressed. They typically outweigh or are more evident than recessive features.
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based on the purifying selection hypothesis, how would changes in the rate of mutation influence whether sexual or asexual reproduction is favored?
Based on the purifying selection hypothesis, under high mutation rates, sexual reproduction is favored.
A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome. Errors in DNA replication, viral replication, mitosis, meiosis, or other types of DNA damage (such as pyrimidine dimers from exposure to ultraviolet radiation) can result in mutations.
These errors can then result in repair processes that are prone to error, such as microhomology-mediated end joining, or they can result in errors during replication (translation synthesis). Due to mobile genetic elements, mutations can also result from the insertion or deletion of DNA segment. An organism's observable traits, or phenotype, may or may not change as a result of a mutation.
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in the basal hemoglobin-oxygen dissociation curve, what percentage of oxygen is release to the tissues when the po2 averages 40 mmhg?
Hemoglobin saturation eventually starts to reduce quickly as the PO2 drops; at a PO2 of 40 mmHg, haemoglobin is 75% saturated.
Hemoglobin, meanwhile, is 50% saturated at a PO2 of 25 mmHg. When a molecule of oxygen is attached to 50% of each hemoglobin's heme groups, this condition is known as P50.
The oxygen-hemoglobin dissociation curve (also known as the oxyhemoglobin dissociation curve or oxygen dissociation curve, or ODC) is a curve that contrasts the proportion of haemoglobin in its saturated (oxygen-laden) form on the vertical axis with the predominant oxygen tension on the horizontal axis. To comprehend how our blood transports and releases oxygen, it's helpful to understand this curve. Oxygen saturation (SO2) and the blood's partial pressure of oxygen are related by the oxyhemoglobin dissociation curve (PO2).
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jess has a- blood type, has never received a blood transfusion, and has never been pregnant. antibodies against what blood antigens will be present in jess' blood?
Jess, with blood type A-, has never received a blood transfusion and has never been pregnant, so it can be assumed that she has not been exposed to any foreign blood antigens.
Blood type A- individuals lack the A antigen on their red blood cells and carry the anti-B antibody in their plasma. This means that Jess' blood will have antibodies against the B antigen, but not the A antigen.
In a blood transfusion, the recipient's immune system recognizes any foreign antigens present on the donated blood cells as a threat and produces antibodies against them. Similarly, during pregnancy, the mother's immune system may produce antibodies against fetal blood antigens if they differ from her own.
However, since Jess has never received a transfusion or been pregnant, it is likely that her blood contains only the naturally occurring anti-B antibody.
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what is the meaning of agriculture is magical in farming life in another world
The idiom "Agriculture is mystical in agricultural life in another planet" may be a reference to the idea that farming or the act of farming holds a special and important place in the lives of people who exist in a made-up universe.
What would you say about farming?
Agricultural practices include the science and art of cultivating land, raising livestock, and growing crops. It helps in the preparation of plant and animal products for human consumption and in the sale of those products in markets. Agriculture is used to produce the majority of the food and textiles in the world.
What four different agricultural types are there?
The four fundamental types of agriculture are shifting cultivation, subsistence farming, pastoralism, and factory farming.
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a hypotonic solution group of answer choices would cause cells in the solution to lose water. causes gaps to form in the cell membrane. kills the cell. has a lower concentration (number) of solute particles than do the cells in the solution. has a higher osmotic pressure than do the cells in the solution.
Has a lower concentration (number) of solute particles than do the cells in the solution. When a solution is hypotonic, water moves net from the solution into the body.
When a cell is placed in a hypotonic solution, it will inflate and then eventually explode due to a process called cytolysis. A cell will contract and lose water if it is submerged in a hypertonic solution. The size of the cell does not change in an isotonic environment since there is no net water movement. Water will enter a cell when it is in a hypotonic environment, causing the cell to expand. Water diffuses into the cell as a result of osmotic pressure, and the cell frequently appears turgid or bloated.
The complete question is:
A hypotonic solution has a lower concentration (number) of solute particles than do the cells in the solution.
would cause cells in the solution to lose water.kills the cell.has a higher osmotic pressure than do the cells in the solution.causes gaps to form in the cell membrane.Learn more about cells here:
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At the end of three weeks, gently lift the formation out of the plastic container and gently break apart the layers. examine the changes in the bottom and top layers of sand and in the leaves and twigs. write down your observations.
A small amount of garden soil placed in a glass jar with water, mixed, and let to stand for two hours would result in a layering of humus, water, clay, and sand.
Because they weigh less and are smaller than sand particles, silt particles often overlie sand. The smallest clay particles will be on top if you were able to separate them out. You might only get sticky clay lumps at the bottom of the jar if your soil is an extremely thick clay. You ought should be able to discern the formation of several layers now that the water has settled out.
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spirochetes are small bacteria that live in lice, fleas, ticks, and mites. (A) true, (B) False
The given statement, "Spirochetes are small bacteria that live in lice, fleas, ticks, and mites" is true because these bacteria cause diseases in humans via the lice, fleas or mites.
Spirochetes are the members of the phylum Spirochaetota. They are the gram-negative bacteria that occur in the shape of spirillum and may be 5 to 250 microns long. They are known to cause diseases like syphilis, Lyme disease, relapsing fever and leptospirosis. They are even known to cross the blood-brain barrier.
Bacteria are the microorganisms that can be found in any environment. They exist in various shapes and can be good or bad for the living organisms. The examples are: E. coli, Cyanobacteria, Salmonella, Bacillus, Helicobacter, etc.
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which of the following is not a gammaproteobacteria, human pathogen? question 9 options: escherichia salmonella bordetella shigella
The option that is not a gammaproteobacterium and a human pathogen is Bordetella.
Bordetella is a genus of gram-negative bacteria that includes several species, including Bordetella pertussis and Bordetella parapertussis, which are responsible for causing whooping cough in humans.
Escherichia coli, Salmonella, and Shigella are all members of the gammaproteobacteria class and are known to cause human diseases. E. coli is a common cause of urinary tract infections and food poisoning, Salmonella causes food poisoning and gastroenteritis, and Shigella causes dysentery.
In conclusion, Bordetella is not a gammaproteobacterium, but it is a human pathogen, whereas Escherichia, Salmonella, and Shigella are gammaproteobacteria and human pathogens.
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which are true of rods? multiple select question. they function well in dim light. they discriminate between colors. there are more than 100 million rod cells per eye. they provide a crisp, focused vision. they are concentrated at the visual axis of the eye, near the center of the retina.
Option A and Option C: they function well in dim light, and there are more than 100 million rod cells per eye, are true of rods.
Rods and cones are the two different types of photoreceptors. The optic nerve transmits signals from these photoreceptors to the brain for processing. The optic nerve is a group of nerve fibers that runs between the brain and each eye's retina. In a typical human eye, there are more rod photoreceptors than cone photoreceptors (120 million rods and 6 million cone photoreceptors). Thus, option A and C are the right choice.
Photoreceptors are retinal cells that detect light and influence how colors are perceived. The portion of the retina at the rear of the eye that is sensitive to light. Distinct proteins make up and serve different purposes in different photoreceptors. They are situated close to the retinal pigment epithelium (RPE), a layer necessary for photoreceptor cells to survive, at the back of the retina.
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How does its acceptance, or lack thereof, in the scientific community, illustrate
principles of stability or change?
The lack of it in the scientific community exemplifies the principles of stability and change in science and explains that science is dynamic and is based on empirical evidence, experimentation, and observations.
What is the significance of the scientific community?The scientific community is flexible, which means that if new research explains a new concept, the old concept gets rejected, and based on that, new research is conducted, but if new evidence and research support the theory, it may gain acceptance.
Hence, the lack of it in the scientific community exemplifies the principles of stability and change in science and explains that science is dynamic and is based on empirical evidence, experimentation, and observations.
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A network of protein filaments that extend throughout the cytoplasm is called?
Cytoskeleton is basically a network of protein filaments which extend through the cytoplasm of the cell.
The cytoskeleton is basically the network of fibers which form the prokaryotic cells, eukaryotic cells, and archaeans. These fibers which are present in the eukaryotic cells contain a complex mesh made up of protein filaments and also motor proteins which help in the cell movement.
Cytoskeleton performs the function of providing shape as well as support to the cell, organizing the organelles and also facilitating the transport of molecules, cell division as well as cell signaling. It consists of microtubules, microfilaments and intermediate filaments.
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Where is the KE (kinetic) the highest? When the spring is at the?
A-bottom
B- middle
C- top
Where is the PEgray (potential energy from gravity) the highest?
A-bottom
B- middle
C- top
Where is the PEelas (elastic potential energy) the highest?
A- bottom
B-middle
C-top
Is work being done with mass?
If so explain why, if not explain why
EVERY QUESTION NEEDS AN EXPLANATION!!
(Ignore the answers in the picture)
Answer:
A spring is an object that stores elastic potential energy when it is stretched or compressed. When a mass is attached to a spring and is allowed to oscillate, the total mechanical energy (sum of kinetic energy and potential energy) of the system remains constant.
Kinetic energy is the energy an object possesses due to its motion. The highest KE will occur when the mass is moving the fastest, which occurs at the bottom and top of the oscillation. So, the answer is C- top and A- bottom.
Potential energy from gravity (PEgray) is the energy an object possesses due to its position in a gravitational field. The highest PEgray occurs when the mass is at its lowest point, which is the bottom. So, the answer is A- bottom.
Elastic potential energy (PEelas) is the energy an object possesses due to its position relative to an equilibrium point. The highest PEelas occurs when the spring is stretched or compressed the most, which is at the top or bottom of the oscillation. So, the answer is C- top and A- bottom.
Work is being done on the mass when the spring is stretching or compressing. This is because work is defined as the transfer of energy from one object to another. When the spring is stretching or compressing, it is transferring energy to the mass, causing it to move and thus do work. So, the answer is "Yes, work is being done with mass."
select the three components of the cell theory devised in the mid-1800s.
The three components of the cell theory devised in the mid-1800s are-
a. All cells originate from preexisting cells
b. The cell is the fundamental unit of all life
c. All organisms are made of one or more cells
According to the cell theory, cells make up every biological entity; they are the basic building block of life, and all life originates from earlier forms of life. Today, the cell idea has become one of the guiding concepts of biology due to its widespread acceptance. Robert Hooke (1635–1703) coined the term "cell" after examining cork under a low-powered microscope and observing what appeared to be blocks of material making up the cork. The term is now used to refer to a microscopic life form that has a thin cell membrane acting as a barrier between it and its environment.
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which refers to a circulatory route in which blood flows through two consecutive capillary networks before returning to the heart?
Your heart pumps oxygen- and nutrient-rich blood to your body with each heartbeat. The circulatory system is a system of blood vessels that transports blood.
When your blood leaves your heart, it travels to your lungs to take in oxygen. The process then starts over as your heart circulates that blood throughout the remainder of your body.
Your heart, which is around the size of your hand, is a strong muscle. It sends nutrient- and oxygen-rich blood to your body every second. Your circulatory system receives blood from your heart with each beating.
To stay alive, you must have blood. Your body's other tissues receive oxygen and nutrients through the blood that travels from your heart. It also removes waste materials like carbon dioxide from your tissues.
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Which of the following is NOT a piece of information that scientists can obtain from the fossil record?
A. Changes that the Earth’s climate has experienced
B. Information about organisms that lived long ago
C. Changes organisms have experienced over time
D. Information about every single plant and animal that have ever existed
Please answer why you chose this answer
Option D. Information about every single plant and animal that have ever existed is NOT a piece of information that scientists can obtain from the fossil record.
What does the phrase 'the fossil record is discontinuous mean?The phrase 'the fossil record is discontinuous means that it does not exhibit all the evolution process including all animals and plants once live on earth.
Therefore, with this data, we can see that the phrase 'the fossil record is discontinuous indicates it has gaps in information that need to be filled with different sources of data.
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based on the audio, what ecosystems can people explore in the park? glaciers and waterfalls jungles and mountains rivers and mountains waterfalls and rivers
The South American park mentioned there contains the following tourist attractions, according to the Spanish audio. Mountains, glaciers, and lakes make up the park's ecosystem, which visitors can explore.
Map of South American terrain
Due to South America's enormous mountain chain, which is made up of the Andes mountain range and encompasses seven countries and 3,371 million km2, mountains and glaciers are frequently found on the continent.
Lakes are a typical feature in South American landscapes, but the audio also includes volcanoes, lakes, and other features that aren't mentioned here.
Ecosystem refers to the interactions between living things and their surroundings. It consists of the physical surroundings, such as the weather, the scenery, the living things—plants, animals, and other organisms—as well as their relationships.
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Answer:
Jungles and mountains
Explanation:
i did this before
which sequence shows the steps of the process of science in an order in which they might occur? which sequence shows the steps of the process of science in an order in which they might occur? question, observation, experiment, analysis, prediction exploration, hypothesis, prediction, experiment exploration, question, opinion, conclusion, hypothesis experiment, conclusion, exploration, application
The correct order for the scientific method is exploration >> hypothesis >> prediction >> experiment. option (D)
The scientific method is an empirical way of collecting information that has defined scientific advancement since at least the 17th century (with notable practitioners in previous centuries; see the article history of scientific method for additional detail.)
It entails thorough observation and applying severe skepticism to what is observed, given that cognitive preconceptions might alter how the observation is interpreted. It entails developing hypotheses based on such observations through induction; testing hypotheses by experimental and measurement-based statistical testing of deductions made from the hypotheses; and refining (or eliminating) hypotheses based on experimental findings.
In conclusion, the correct order for the scientific method is exploration >> hypothesis >> prediction >> experiment.
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Full Question Which sequence shows the steps of the process of science in an order in which they might occur?
O exploration, question, opinion, conclusion, hypothesis
O question, observation, experiment, analysis, prediction
O experiment, conclusion, exploration, application
O exploration, hypothesis, prediction, experiment
your friend, a male soccer player weighing 86 kg, is trying to determine how many carbohydrates should be consumed 2 hours before his soccer game. based on his weight, how many grams of carbohydrate would you recommend for your friend 2 hours before the soccer game?
129g to 387g of carbohydrates 2-3 hours before the soccer game.
What is carbohydrates?
Carbohydrates are biomolecules comprising carbon, hydrogen and oxygen atoms. They are an important source of energy.
The recommended amount of carbohydrates to consume before exercise varies depending on a number of factors, such as the intensity and duration of the activity.
However, a general guideline is to consume 1.5-4.5 grams of carbohydrates per kilogram of body weight 2-3 hours before exercise.
For your friend, who weighs 86 kg, this would mean consuming
1.5 g/kg * 86 kg = 129 g
to
4.5 g/kg * 86 kg = 387 g
129g to 387g of carbohydrates 2-3 hours before the soccer game.
Therefore, It is always best to consult with a sports nutritionist to determine the optimal amount of carbohydrates based on individual needs and goals.
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