Plants' roots, stems, and leaves are made up of diverse tissues such as xylem, phloem, epidermis, cortex, pith, and endodermis. Plant roots, stems, and leaves should all be considered plant organs.
Each plant organ comprises all three tissue types, although they are arranged differently in each organ. In dicot roots, the xylem and phloem of the stele are placed alternately in an X shape, but in monocot roots, the vascular tissue is arranged in a ring around the pith. Furthermore, monocots have fibrous roots, whereas eudicots have tap roots. Vascular bundles in dicot stems are organized in a ring toward the stem's periphery. The vascular bundles in monocot stems are randomly distributed throughout the ground tissue. There are two types of photosynthetic parenchyma cells in leaves (palisade and spongy). They, like all plant organs, have vascular tissue. The leaves of monocots have parallel veins of vascular tissue, whereas the leaves of dicots have branching or net-like veins of vascular tissue. So, the roots, stems, and leaves of plants are made up of a variety of tissues, including the xylem, phloem, epidermis, cortex, pith, and endodermis are all examples of plant organs.
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which of the following is the best example of a conditioned reinforcer? * 1 point a cold root beer for mowing the lawn on a hot day pudding for eating all your peas at supper termination of shock after removing one's finger from a live electric wire a spanking for eating cookies before dinner applause for an excellent piano recital
The best example of a conditioned reinforcer is a cold root beer for mowing the lawn on a hot day.
What is conditioned reinforcer?
A conditioned reinforcer is a stimulus that has been associated with a primary reinforcer and is used to increase the probability of a desired behavior. It is used to reinforce a behavior that has been learned through conditioning. Examples of conditioned reinforcers include verbal praise, tokens, and points.
Therefore, The best example of a conditioned reinforcer is a cold root beer for mowing the lawn on a hot day.
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Explain why it is incorrect to day that the mice changed because they wanted or needs to change?
Answer:
It is incorrect to say that the mice changed because they wanted or needed to change because evolution is not a conscious process driven by the choices or preferences of the organism. Evolution is a natural process which occurs over a long period of time and is driven by the process of natural selection. Natural selection is the process by which organisms with helpful mutations survive and reproduce more successfully than those without those mutations. Through this process, beneficial traits become more common over time and the population of organisms changes.
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You notice that one of your coworkers is disposing of contaminated materials in the regular trash. You have seen her throw away her gloves, blood-soaked gauze, and tubes of blood in the trash receptacle that is used for paper products and other regular waste. Discuss what possible effects this coworker's actions have on other employees and explain how the employee should have disposed of the contaminated materials.
Answer: Disposing of contaminated waste along with regular trash, such as paper products, is a health hazard and can have severe consequences in the workplace.
Explanation: Biomedical waste such as contaminated gloves, blood-soaked gauze, and tubes of blood are usually incinerated and never disposed of along with regular trash. If a coworker does so, other employees will be exposed to the risk of being infected by multiple microorganisms that are present in the contaminated materials. Contact with infectious waste can also result in the spread of life-threatening viral diseases as well.
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1.Researchers wanting to stimulate
distinct, specific emotions would be most
successful if they could do which of the
following?
a. manipulate heart rates
b. change internal body temperature
c. stimulate different brain regions
d. modify the secretion of adrenaline
Answer:
C. Stimulate different brain regions.
Explanation:
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Describe the three layers of tissue in arteries and veins. Then explain how the structure of arteries and veins relates to their functions.
The three layers of tissue in arteries and veins are Tunica adventitia, Tunica media and Tunica intima.
The arteries role is to carry the oxygenated blood from the heart to the rest of the body and the role of veins is to carry deoxygenated blood from the various parts of the body to the heart.
The outermost layer of the arteries and veins is tunica adventitia, its role is to expand and contract and maintains the blood pressure, it also plays a role in protection.
The middle layer called tunica media and is made up of elastin and muscle fibres.
inner most is called as tunica intima, it has valves which help blood move in a particular direction.
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What are the 4 types of anatomical planes?
Answer:
The sagittal plane, the coronal plane, the cranial and caudal plane
Explanation:
An anatomical plane is a hypothetical plane that is used to transect the body to indicate the placement of structures or the direction of movement. Three major planes are employed in human and animal anatomy:
The sagittal plane, also known as the lateral plane (longitudinal, anteroposterior), is a plane that runs parallel to the sagittal suture. It separates the body into two parts: left and right.
The coronal plane (vertical) separates the body into dorsal and ventral (back and front or posterior and anterior) halves.
The cranial and caudal (head and tail) sections of the animal are divided by the transverse plane or axial plane (horizontal).
select the appropriate theme of biology: fungi are decomposers that breakdown waste and the remains of dead organisms, changing complex molecules into simple nutrients making nutrients available for plants to take up from the soil.
The theme of biology that best applies to the statement "fungi are decomposers that break down waste and the remains of dead organisms, changing complex molecules into simple nutrients making available for plants to take up from the soil is ecology.
Ecology is the study of the interactions between organisms and their environment, including how living things interact with one another and with nonliving components of their surroundings. In this context, fungi play an important role in the ecosystem by breaking down organic matter, recycling nutrients, and maintaining the balance of nutrient cycling. In this way, they contribute to the maintenance of soil fertility and the overall health of the ecosystem.
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Based on the graph, which wavelengths would be utilized the most in a hypothetical photosynthetic organism that would contain only chlorophyll a and no other pigment? Absorption Spectra Chlorophylla --- Chlorophyll ---Carotene 350 400 500 550 600 650 700 Wavelength (m) 440 nm and 660 nm 420-450 nm only 440-660 nm 0 400-500 only
The wavelengths which would be utilized the most in a hypothetical photosynthetic organism that would contain only chlorophyll a and no other pigment 440nm & 660 nm.
What is chlorophyll?Chlorophyll is essential for photosynthesis, which allows plants to absorb energy from light.
Chlorophyll molecules are organised in and around photosystems that are incorporated in chloroplast thylakoid membranes. Chlorophyll performs three roles in these complexes:
The vast majority of chlorophyll (up to several hundred molecules per photosystem) absorbs light.
After that, these identical centres carry out their secondary function: The transmission of that energy to a specific chlorophyll pair in the photosystems' reaction centre via resonance energy transfer.
This particular pair is responsible for the ultimate function of chlorophylls: Charge separation results in unbound protons (H+) and electrons (e) that drive biosynthesis independently.
The two currently recognised photosystem units are photosystem I and photosystem II.
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Complete question:
name the cells that produce bile, synthesize blood components, and perform interconversion of nutrients.
Hepatocytes. The primary parenchymal cells, hepatocytes, are involved in protein synthesis, detoxification, and metabolism.
By secreting innate immunity proteins, hepatocytes also stimulate innate immunity against invasive pathogens. These proteins include bactericidal ones that kill bacteria directly, opsonins that help phagocytoze foreign bacteria, iron-sequestering ones that prevent bacteria from absorbing iron, a number of soluble ones that control lipopolysaccharide signalling, and the coagulation factor fibrinogen that stimulates innate immunity.
A cell of the liver's primary parenchymal tissue is known as a hepatocyte. 80% of the liver's bulk is made up of hepatocytes. These cells participate in:
Protein productionstorage of proteincarbohydrate transformationCreation of bile salts, phospholipids, and cholesterolExogenous and endogenous drug detoxification, modification, and excretionbeginning of bile production and secretion.Learn more about cell here:
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In echinoderms, the water vascular system is a system of closed, fluid filled tubes and ducts that connect to tube feet which act like suction cups.
The water vascular system is the main organ system used by echinoderms to move, feed, and respire. The water vascular system is also used to aid in respiration, as water is taken in, filtered, and then expelled from the body.
What is vascular system?
The vascular system is a network of vessels and organs that circulates blood throughout the body. It is made up of the heart, veins, arteries, and capillaries. The heart pumps the blood, which is composed of red blood cells and dissolved oxygen, nutrients, and hormones. Veins carry oxygen-poor blood back to the heart. Arteries carry oxygen-rich blood away from the heart. Capillaries are small vessels that connect the veins and arteries and allow for the exchange of gases, nutrients, and waste products between the blood and the body's cells.
The system is made up of a network of canals and sacs that are filled with water, and the pressure of this water is used to extend and retract the tube feet. The tube feet are used to attach the animal to substrates and to move food particles towards the mouth.
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write the number of offspring plants with each phenotype in the offspring phenotype columns. also, make sure you have run enough trials that you can both determine the genotype of each parent plant and produce yellow and white-flowered plants.
As a result, with this cross, you would anticipate that three of the four (75%) progeny will have purple flowers and one of the four (25%) would have white flowers.
The genotypes of the offspring of this hybrid can be used to predict the proportions of phenotype. Offspring with either the BB or Bb genotype will have the purple-flower phenotype because B is dominant to b. The white-flower phenotype can only be inherited through the bb genotype.The white-flower phenotype can only be inherited through the bb genotype. Mendel obtained the same percentages in his initial experiment.For instance, the genotype Yy was present in the F1 yellow plants that inherited a Y allele from their yellow parent and a y allele from their green parent.
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you and 19 friends build a raft, sail to a deserted island, and start a new population, totally isolated from the world. Two of your friends carry (that is, are heterozygous for) the recessive cf allele, which in homozygotes causes cystic fibrosis A. Assuming that the frequency of this allele does not change as the population grows, what wil be the instance of cystic fibrosis on your island? B. Cystic fibrosis births on the island is how many times greater than the original mainland. The frequency of births on the mainland is .059%.
Answer:
A. Assuming that the frequency of the recessive cf allele does not change as the population grows, the instance of cystic fibrosis on the island would be relatively low. The allele is recessive, meaning that it only causes the disease when present in a homozygous state (i.e. two copies, one from each parent). Since only two of your friends carry the allele, the probability of any two of your friends having children with cystic fibrosis would be (2/20)*(1/19) = 1/190 or 0.52%.
B. Cystic fibrosis births on the island would be 0.52% / 0.059% = 8.8 times greater than the original mainland. However, it's important to note that the population is small and it may be not possible to predict the exact frequency of cystic fibrosis based on the frequency of the allele in such a small group of people.
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11 Which function does not occur in the kidneys? A breakdown of alcohol B C D removal of excess salts from the blood removal of excess water from the blood removal of urea from the blood
The correct answer is A: Breakdown of alcohol.
The kidneys primary function is to filter blood and remove waste products, such as urea, and excess water and salts, which are then excreted as urine. The breakdown of alcohol is done by the liver and not the kidneys.
The kidneys are a pair of organs located in the back of the abdomen that play a vital role in maintaining the overall health of the body. The main function of the kidneys is to filter waste products and excess fluids from the blood and convert them into urine.
This process is known as filtration. The kidneys also regulate the levels of electrolytes, such as sodium, potassium and calcium in the blood, and control the balance of acid and base in the body.
The kidneys also play a role in regulating blood pressure by producing a hormone called erythropoietin, which stimulates the production of red blood cells and help to conserve oxygen in the body.
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The Complete question is:
11 Which function does not occur in the kidneys?
A. breakdown of alcohol
B. removal of excess salts from the blood
C. removal of excess water from the blood
D. removal of urea from the blood
What geographic region is not on the map but is located between the sahel and the congo basin and can be described as having fertile grasslands, farmland, and plenty of wildlife that you would find on safari tours?
Savanna
Great rift valley
Sahara
Coastal areas
This tutorial will take you step-by-step through the question. Shell coiling of the snail Lymnaea peregra results from a genetic maternal effect. An autosomal allele for a right-handed shell, st, called dextral, is dominant over the allele for a left-handed shell, s, called sinistral. In general, snails are hermaphroditic and reproduce as both males and females. However, a pet snail named Martha is sinistral and reproduces only as a female. Martha and her family are shown in the pedigree. Martha's dad Martha's mom Sinistral o Dextral Martha Dextral o Sinistral Sinistral Sinistral o Sinistral Sinistral Sinistral Dextral Dextral Dextral Step 2: Based on the mother's genotype, determine the phenotype expressed in the progeny. Determine the phenotype of the progeny given a specific maternal genotype. Place the expected phenotype of the progeny next to each genotype of the mother. Mother's genotype Phenotype of progeny Answer Bank sts sinistral dextral SS
In this snail population the right handed coiling which is called dextral (S+) is dominant trait over sinistral (S) the left handed coiling.
What is a dominant and recessive trait?
A dominant trait is a trait that is expressed when a single allele is present in an organism. A recessive trait is a trait that is only expressed when two alleles for that trait are present in the organism. For example, the trait for eye color in humans is determined by two alleles: brown (dominant) and blue (recessive). If an organism has one brown allele and one blue allele, the organism will have brown eyes since the brown allele is dominant. If both alleles are blue, the organism will have blue eyes.
So it means that in the table:
The genotype S+S+ & S+S will show the dominant phenotype dextral as it holds the dominant phenotype (S+), and the SS will show the recessive trait sinistral as the trait S is described as the recessive trait.
Mother's genotype Phenotype of the progeny
S+S+ Dextral
S+S Dextral
SS Sinistral
Therefore, dextral (S+) is dominant trait over sinistral (S) in this snail population.
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The stirrup is a part of the
a. outer ear
b. middle ear
c. inner ear
d. cochlea
The loudness of a sound depends on
a. frequency
b. intensity
c. overtones
d. timbre
The blending of fundamental tone and overtones produces a sound's
a. intensity
b. pitch
c. timbre
d. loudness
In ecological terms, disturbance is an event such as a storm, fire, or human activity that changes a community, removing organisms and altering resource availability. Which of the following statements about the effects of disturbance is correct? Disturbances can create patches of different habitats in a community.As a result of disturbance, biomes often exhibit extensive patchiness, with several different communities represented in a single area. This increases biodiversity within the biome. Read about disturbance and terrestrial biomes.
In ecological terms, disturbance is an event such as a storm, fire, or human activity that changes a community, removing organisms and altering resource availability. Disturbances can create patches of different habitats in a community.
Ecosystems are dynamic systems that are continually in the process of recovering from previous disturbances and prone to recurring disruptions. Resistance is a phrase used to describe an ecosystem's propensity to hold onto a condition that is relatively close to equilibrium notwithstanding a disruption. Ecological resilience is the ability of a system to withstand change while adapting to disturbance and reorganise in order to maintain essentially the same function, structure, identity, and feedbacks. Theoretical research, long-term ecosystem monitoring studies, comparative studies that focus on the contrasts between ecosystems to better understand how they function, and direct manipulative experimentation are just a few of the methods that can be used to study ecosystems. Among ecosystems, biomes can be thought of as a generic class or category.
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in photosynthesis, light energy is used to split water molecules and pump hydrogen ions into the inner thylakoid membranes of the chloroplast. which of the following statements best explains the purpose for creating a high concentration of ions inside the inner membrane?
The ATP synthase uses this proton gradient to generate a proton-motive force, which it then uses to manufacture ATP.
The two successive steps of light-dependent reaction and light-independent reaction make up the photosynthesis process. During photophosphorylation, where cytochrome b6f and ATP synthase collaborate to make ATP, the H+ ion (Proton) gradient is formed. Non-cyclic photophosphorylation creates a proton gradient across the thylakoid membrane by pumping H+ ions from the stroma to the lumen using electrons created by PS 2. The ATP synthase uses this proton gradient to generate a proton-motive force, which it then uses to manufacture ATP. In cyclic photophosphorylation, cytochrome b6f harnesses the energy of PS2 and PS1 electrons to produce ATP while limiting NADPH synthesis.
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all reasons that archaea are of interest to scientists.
Multiple select question.
Archaea share features with bacteria and eukaryotes.
Some archaea produce toxins that can kill livestock.
Some archaea live in extreme environments.
Some archaea produce methane, a greenhouse gas.
Many archaea cause disease in agricultural crops.
The reasons why scientist have an area of interest in archaea is, Archaea share features with bacteria and eukaryotes, Some archaea live in extreme environments and some archaea produce methane, a greenhouse gas.
Archaea has genes which are both similar to bacteria and eukaryotes, but it is said that is more similar to eukaryotes.
archaea cell membrane are made up of different molecules, which help them thrive in extreme temperatures, their cell membrane is composed of ether linkages with branched isoprene chains.
Methanogens is a group under archaea, which produces methane gas.
There is also a class of halobacterium, which can survive in great amount of NACL (salty ) area.
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provide reasoning to explain how mutant 1 can grow on treatment i medium but cannot grow on treatment iii medium.
Mutant 1 can use methionine when it is present in the medium, but it cannot synthesize methionine.
A mutant is an organism or a new genetic character that arises or results from an instance of mutation, which is generally an alteration of the DNA sequence of an organism's genome or chromosome.
It is a characteristic that would not be found in a specimen naturally. A virus with a change in its nucleotide sequence whose genome is in the nuclear genome is also referred to as a mutant.
The natural occurrence of genetic mutations is essential to the evolution process. The study of mutants is an important part of biology; by understanding the effect of a gene mutation, it is possible to determine the normal function of that gene.
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after looking at the bloodstains in the figure, answer the following questions: which three drops struck the surface closest to a 90-degree angle? explain your answer. which three drops struck the surface farthest from a 90-degree angle? explain your answer. in what direction were drops 2 and 7 traveling when they struck the surface? explain your answer.
We can safely assume that, in a clear reflection, the light will return to the substance at the same angle that it first touched it.
When light strikes a smooth, transparent surface, like a mirror, it reflects in this way. When this occurs, the light bounces back off the medium at an angle that is equal to the angle at which it first struck the material. As a result, light will reflect off a mirror at an angle of 40 degrees if it strikes it at that angle. We can therefore affirm that, in a clear reflection, the light will bounce back at an angle that is equal to the angle at which it first struck the substance, in this case a 40-degree angle. We can safely assume that, in a clear reflection, the light will return to the substance at the same angle that it first touched it.
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What is the diffrence between someone who is homozygous for a trait and someone who is heterozygous for a trait?
Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
The image shows how ocean water becomes acidic. Match the letters with the labels to describe the process.
A
acid precipitation
acidic water
condensation of chemicals in the atmosphere
A
B
B
D
417
sulfur dioxide
marine life
It works like this to match letters to their processes, A: Sulphur dioxide, B: The atmospheric condensation, C: Acidic precipitation, D: acid water
What is the atmosphere?
An atmosphere is any of the various layers of gases that are present in a planet or other celestial body.
The image that follows fully illustrates how acid rain works in the atmosphere. In light of this, a brief discussion of the technique for matching letters to their processes was made above.
The atmosphere of Earth is what creates all the clouds you see in the sky, the wind that blows through the leaves of the trees or the flag in your school yard, and even the sunlight that you feel on your face.
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humans are designed to breathe through the mouth when possible, which filters the air on the way into the lungs.
False that humans are designed to breathe through the mouth when possible, which filters the air on the way into the lungs.
What is the main breathing organ of body ?Lungs. your lungs are sponge-like organs. Every time you breathe they filter oxygen from the air through tiny vessels into the blood. It is then carried to the heart to be pumped round your body.
Air enters the respiratory system through the nose or the mouth, then travels down a pathway to the lungs. In the nostrils, air gets warmed and moistened. Tiny hairs in the nose called cilia filter out dust and other particles
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Doctors sometimes use a vaccine to prepare the body to defend itself against future infections. These vaccines most often containanswer choicesantibodiesantibioticswhite blood cellsweakened pathogens
Doctors sometimes use a vaccine to prepare the body to defend itself against future infections.
These vaccines most often contain weakened pathogens.
A vaccination is a biological treatment that boosts resistance to a specific disease. It includes a pathogen that doesn't cause disease, like a virus or pathogens that has been weakened or rendered inactive. The immune system responds to the introduction of this virus by creating specific antibodies in response to it because it perceives it as a foreign substance. The immune system is trained to recognise and respond promptly and effectively if the person is exposed to the real virus later on through this process of exposure to a harmless variant of the disease. White blood cells, antibiotics, and antibodies are all parts of the immune system, but they are not usually included in vaccinations because they are not required to develop a protective immunity.
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Which technology resulted from engineers observing the structure of a cheetah's back legs?
A. Improved prosthetic limbs
B. More efficient solar cells
C. Hook-and-loop fasteners
D. Faster high-speed trains
Answer: A. Improved prosthetic limbs.
Explanation: Cheetahs are known for their grace and speed. Engineers studying the structure and mechanics of a cheetah's back legs were able to gain insights into how the cheetah achieves its incredible speed and agility. By understanding the unique design and function of the cheetah's legs, engineers were able to apply this knowledge to the development of improved prosthetic limbs.
Cheetahs have long, flexible legs with a large range of motion, allowing them to generate powerful and efficient strides. Engineers observed the cheetah's leg structure, including the way the bones, tendons, and muscles work together, to design prosthetic limbs that mimic the natural movement and efficiency of a cheetah's legs.
These improved prosthetic limbs can provide individuals with enhanced mobility and functionality, allowing them to move more naturally and comfortably. By studying the cheetah's back legs, engineers were able to make advancements in prosthetic technology, improving the quality of life for individuals who use prosthetic limbs
Explain why phytoplankton grow father in shallow water than they do in the middle of the ocean?
Answer:
Water temperature is a key factor affecting phytoplankton bloom dynamics in shallow productive coastal waters and could become crucial with future global warming by modifying bloom phenology and changing phytoplankton community structure, in turn affecting the entire food web and ecosystem services.19 Mar 2022
Explanation:
Phytoplankton grow well in estuaries where water is trapped within warm, shallow areas and sunlight, carbon dioxide, and other nutrients needed for growth are plentiful.20 May 2021
essential question: how do materials move into and out of the cell through a membrane? 1. pre-lab questions: (respond in complete sentences
Materials move into and out of the cell through a cell membrane by the process of diffusion.
Plasma membrane is a selectively permeable membrane which allows only a few substances to move in and out of it. The most direct transfer techniques use passive membranes. Natural processes like passive transport take place without the cell using energy to move. Chemicals move passively from a location of higher concentration to a region of lower concentration through a process called diffusion. A concentration gradient is a difference in the concentration of one substance throughout a physical region. If molecules are passes against the concentration gradient, it happens through active transport. Ions, glucose, and amino acids move through the membrane via active transport in opposition to the concentration gradient. It requires ATP, the chemical component of cellular energy. The membrane's protein molecules serve as channels via which molecules can move.
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"Any genetic difference among individuals that is present in multiple individuals in a population" is the definition of a(n):
Any genetic difference among individuals that is present in multiple individuals in a population" is the definition of a(n): polymorphism.
Polymorphism in biology is the presence of two or more obviously different morphs or forms, sometimes known as alternative phenotypes, in a species' population. To be categorized as such, morphs must share the same environment and be members of a panmictic population (one with random mating).
Simply said, polymorphism occurs when there are two or more possible traits on a gene. For example, there are several different traits for a jaguar's skin coloration; it might be pale or black.
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every time you have a cold, you drink orange juice and feel better within a day. this leads you to formulate the hypothesis that the vitamin c in orange juice reduces the duration and severity of the symptoms of the common cold. what is your null hypothesis? vitamin c increases the duration and severity of the symptoms of the common cold. consuming juice of any kind decreases the duration and severity of the symptoms of the common cold. consuming juice has no effect on the duration and severity of the symptoms of the common cold. all of the answer options are correct. vitamin c has no effect on the duration and severity of the symptoms of the common cold.
According to research, consuming 1,000 mg and 2,000 mg dose of vit C on a regular basis may lessen the duration and intensity of cold symptoms.
When you're unwell, does orange juice help you feel better?Orange juice is a delicious way too hydrate, but there is mixed evidence regarding its ability to treat colds. A sore or swollen throat may get irritated by the acid. In addition to being rich in sugar, many orange drinks sold in stores are not advised for treating symptoms.
What benefits does vitamin C offer?All bodily tissues need vitamin C, commonly referred to as ascorbic acid, to grow, develop, and heal. It has a role in a variety of bodily processes, such as collagen synthesis, iron absorption, and immune system health healing of wounds and the preservation of teeth, bones, and cartilage.
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