The questions can be Why DNA is a suitable molecule for information storage?, What is the function of the genes in the DNA molecule?, and What is the role of the chromosomes in the cell nucleus?.
What is scientific question?A scientific question is one that may generate a hypothesis and assist in determining the cause of an observation.
A good scientific hypothesis must be verifiable and quantifiable. You can do an experiment to find the solution.
The pertinent questions regarding the function of chromosomes and DNA can be clarified or answered as follows:
Why is DNA a good molecule for storing information? What purpose do the genes serve in the DNA molecule? What purpose do the chromosomes serve in the cell nucleus?Thus, these are the questions required.
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what term best describes the relationship of the bones in the forelimbs of penguins and seals, and what term best describes the flippers of penguins and seals?
(1) Homologous is the best describes the relationship of the bones in the forelimbs of penguins and seals.
(2) Analogous is the best describes the flippers of penguins and seals
Analogous organs have comparable functions, while homologous tissues share a similar embryonic origin. For instance, the bones in a human arm and a whale's front flipper are anatomically similar. The constructions here are not comparable. The wings of a butterfly and a bird are similar but not identical.
Analogous structures or analogous organs are any two structures or organs that have different structural characteristics but execute the same functions. Homologous organs are the opposite of similar organs. Organs that are structurally identical to one another but have diverse purposes are known as homologous organs.
The question is incomplete, it should be:
Both ancestral birds and ancestral mammals shared a common ancestor that was terrestrial. Today, penguins (which are birds) and seals (which are mammals) have forelimbs adapted for swimming. What term best describes the relationship of the bones in the forelimbs of penguins and seals, and what term best describes the flippers of penguins and seals?
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An ionic bond will form between one positive ion and:
O A. one negative ion.
OB. any other ion.
OC. another positive ion.
OD. one neutral atom.
Option A is the appropriate response, An ionic bond will form between one positive ion and one negative ion.
What do ions do?An atom or molecule is called a "ion" when the proton and electron counts are out of balance, which generates a net electric charge.
How do you figure it out?Ionic connections are formed when a positive ion, also known as a cation, and a negative ion combine (also known as an anion). This link is formed by the transfer of an electron from one element to another, resulting in the production of a positive and a negative ion. Positive and negative ions are drawn to one another because of their opposing charges, which results in the formation of an ionic bond.
The resistance between two positive ions prevents them from forming an ionic bond. Similar to this, the absence of any charges that may attract two neutral atoms together prevents them from forming an ionic bond.
Ionic bonds are important for the production of many natural substances, such as salts and minerals, as well as for many biological processes.
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the plants in a biome grow very tall. which statement most likely describes the abiotic factors in the biome?(1 point) responses the biome receives abundant sunlight. the biome receives abundant sunlight. the biome has very cold temperatures year round. the biome has very cold temperatures year round. the biome has limited rainfall. the biome has limited rainfall. the biome's soil lacks nutrients. the biome's soil lacks nutrients.
Trees growing tall indicates an abundance of sunlight in the biome. The correct response is that the biome receives abundant sunlight.
Plant growth is dependent on various factors like sunlight, water and temperature, and nutrients from the soil. The absence or extreme of any can be detrimental to growth.
Plants like other organisms require sunlight as they develop. Abundance of sunlight promotes higher rates of photosynthesis, providing an opportunity for increased growth of the trees.
Cold temperatures year round inhibit the growth of the trees and lead to stunted growth. This is why trees in tropical regions are taller than the trees in tundra and taiga regions.
As the plant grows it requires water. Water is required for the conduction of nutrients, in photosynthesis and also in the cells to maintain their viability. Limited rainfall would make the trees be able to support a smaller biomass, that is, they would not grow very tall.
If the soil is not fertile it cannot support the growth of trees, as trees grow they require nutrients majorly NPK and other macro and micronutrients. In fertile soil leads to stunted growth.
Considering all the nutrients required, limitation rain and nutrients stunt the growth same is true for the trees facing extreme cold temperatures year-long. Abundance of sunlight with ample nutrients and optimum conditions does however lead to taller growth in trees.
Therefore if the trees in that region grow tall, it likely receives abundant sunlight.
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Which of the following endocrine glands produces over 30 hormones called corticosteroids?
-Thyroid
-Thymus
-Adrenal Cortex
-Adrenal medulla
the pharmacy has aminosyn 8.5% in stock. in order to prepare 150 gram of protein, how many ml of aminosyn will be needed from the stock solution
In order to prepare 150 grams of protein from 8.5% of stock solution of aminosyn stock, 1764.71 ml of of aminosyn will be required.
Aminosyn is a solution containing crystalline amino acids solution present along with electrolytes. If a stock solution has 8.5 % of aminosyn it indicates that 8.5 gm of amino acids are dissolved in the solution. Therefore to calculate the amount of protein formed from it, the formula used is:
Amount of solution required (in ml) × concentration of stock solution = Amounts of protein obtained (in gm)
According to the question,
Amount of solution required × (8.5 / 100) = 150 gm
Amount of solution required = (150 × 100) / 8.5 = 1764.71 ml
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the proper functioning of the respiratory system allows what to occur in the body? what other control system has an impact on this function?
The respiratory system's proper operation enables the tissue's cellular respiration and gas exchange. The circulatory system, which regulates the pace at which oxygen and carbon dioxide are carried to and from tissues, has an impact on this function as well.
Your body uses the oxygen that is absorbed into your bloodstream via your respiratory system. The main thing that keeps your body alive is oxygen. When the respiratory system is operating properly, raises the temperature of the air to that of your body and adds moisture to it to the proper degree of humidity. This process is also influenced by the circulatory system, which controls how quickly oxygen and carbon dioxide are delivered to and removed from tissues.
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Trevor is beginning to get bald at a young age. His father is not bald, but his maternal grandfather has been bald for many years. Some of the older people in his community are bald, but very few younger people are bald.
What factor is most likely influencing Trevor's baldness?
A.
his age
B.
inheritance
C.
environment
D.
bad behavior
In case whereby Trevor is beginning to get bald at a young age. His father is not bald, but his maternal grandfather has been bald for many years the factor that is most likely influencing Trevor's baldness is B.inheritance
What are heredity and inheritance?Genetics is frequently used to refer to heredity, which is the passing on of genetic traits from one generation to the next. The passage of genetic features and their manifestation from one generation to the next is shown by inheritance.
Genetic information is transmitted from parent to kid through inheritance. Members of the same family typically share traits in common because of this.
Therefore, option B is correct because the maternal grandfather has been bald .
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the anthrax toxin was found to interfere with adenylate cyclase. at which point in the cell signaling pathway would this toxin interrupt normal cell signaling? (1 point)
The point in which the cell signaling pathway would this toxin interrupts normal cell signaling is : the second messenger action.
What is anthrax toxin?The bacteria Bacillus anthracis, which is the primary cause of anthrax, secretes the three-protein anthrax toxin. Harry Smith made the initial discovery of the toxin in 1954.
The capacity of cells to react to outside stimuli is known as cell signaling. Examples include changes in gene expression during various phases of development, the healing of wounds following an injury, and immune system activation in response to pathogens. There are four main categories for receptor-ligand interactions and signaling pathway activation: autocrine, endocrine, paracrine, and juxtacrine.
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Which situation would most likely lead to allopatric speciation? a. Flood causes the formation of a new lake. b. A storm causes several large trees to fall down. c. A mutation causes a new trait to develop. d. An injury causes an organism to seek out a new food source.
(C) flood causes the formation of a new lake would most likely lead to allopatric speciation.
Allopatric speciation occurs when a species separates into two separate groups which are insulated from one another. A physical hedge, similar to a mountain range or a raceway, makes it insolvable for them to breed with one another.
Allopatric speciation due to geographic separation The northern spotted owl and the Mexican spotted owl inhabit geographically separate locales with different climates and ecosystems. The owl is an illustration of allopatric speciation.
Allopatric speciation, also known as geographic speciation, is speciation that occurs when natural populations of the same species come insulated due to geographical changes similar to mountain structure or social changes similar to emigration.
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A scientist tags a phospholipid found in the Golgi apparatus. A while later this phospholipid has moved to a different location in the cell. Which of these is the most likely location of this phospholipid
The lysosomes, the plasma membrane is the most likely location of this phospholipid when from Golgi apparatus phospholipid has moved to a different location in the cell.
What is Golgi apparatus?Proteins obtained from the ER are further processed and even sorted in the organ termed as Golgi apparatus, also known as Golgi complex, where Proteins are eventually moved to lysosomes, the plasma membrane, or secretion. the Golgi apparatus also produces sphingomyelin and glycolipids.Phospholipid:A class of polar lipids referred as phospholipids (PL) is composed up of two fatty acids, a glycerol unit, and a phosphate group which is esterified to an organic molecule (X) like choline, ethanolamine, inositol, etc.
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thyroxine activity is dependent on , a trace mineral that regulates basal metabolic rate, and low amounts can result in a goiter. a. zinc b. iodine c. selenium d. iron
Thyroxine activity is dependent on b. iodine, a trace mineral that regulates basal metabolic rate and low amounts can result in goiter.
What do you understand by goiter?Abnormal growth of the gland beneath the Adam's apple that resembles a butterfly (thyroid) is known as goiter. A small goiter without symptoms might not require treatment. Surgery or medicines may be required in some circumstances.
Inflammation of the thyroid gland or a lack of iodine are two typical causes of a goiter. Not every goiter is symptomatic. Swelling and cough are some possible symptoms. Rarely, symptoms may include problems breathing or constriction in the throat.
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The results of the Meselson-Stahl experiments relied on all of the following except _______.
a) a cesium chloride gradient
b) that a heavy isotope of nitrogen could be incorporated into replicating DNA molecules
c) the fact that DNA is the genetic material
d) a means of distinguishing among the distribution patterns of newly synthesized and parent molecule DNA possible
The correct option is C ; The fact that DNA is the genetic material. Meselson and Stahl's work revealed that DNA reproduced semi-conservatively.
which means that each strand in a DNA molecule acts as a template for the production of a new, complementary strand.
There would be two bands in the first generation, one low density and one heavy density. There would still be two bands in the second generation, one for low density and one for heavy density.
Meselson and Stahl chose nitrogen because it is a necessary chemical component of DNA; hence, when a cell splits and its DNA duplicates, it integrates additional N atoms into the DNA of either one or both of its two daughter cells, depending on which model was right..
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two alleles of a given gene exist in a population: ctgt and tgtc. (note: the codes given are only for the transcribed strand of the dna in the two alleles.) three possible single crossover events are possible between these two alleles. as a result of the three different crossover events, how many total new alleles (new sequences of dna) could be produced?
As a result of the three different crossover events between the two alleles ctgt and tgtc, six total new alleles can be produced. The three possible single crossover events are ctgt - tgtc, ctgc - tgtc, and ctgt - tgcc. Each of these events produces two new alleles, producing a total of six new alleles.
These six new alleles will have different combinations of the genetic material from the two parent alleles. For example, the first crossover event, ctgt - tgtc, produces the alleles ctgc and tgtg. The allele ctgc contains the first three nucleotides of the ctgt allele and the last three nucleotides of the tgtc allele.
Similarly, the allele tgtg contains the first three nucleotides of the tgtc allele and the last three nucleotides of the ctgt allele. The other four alleles produced by the other two crossover events will have similar combinations of the genetic material from the parent alleles.
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R. C. Punnett conducted experiments on the inheritance of traits in the sweet pea, Lathyrus odoratus. In one experiment, he crossed two different true-breeding sweet pea plant strains, one with erect petals and long pollen, and the other with hooded petals and round pollen. All the offspring (F1F1 generation) had erect petals and long pollen (Figure 1).
Next, Punnett allowed the F1F1 generation to self-fertilize and recorded the phenotypes of their offspring. The data are shown in Table 1.
Which of the following best explains how the sweet pea plants in the parental generation produce F1F1 offspring with 14 chromosomes?
During meiosis, cells go through meiosis I and meiosis II. This results in formation of cells with half the number of chromosomes as original cell. In meiosis II, sister chromatids separate and two cells combine during fertilization to produce offspring with 14 chromosomes.
How does sweet pea plants in the parental generation produce F1F1 offspring with 14 chromosomes?Homologous chromosomes, or pairs of chromosomes with genes for the same features, split from one another during meiosis I. Two cells with 7 chromosomes mix during fertilization, which is the process by which an egg and sperm combine to form a zygote, to create an offspring with 14 chromosomes.
These 14 chromosomes are made up of the combined contributions of the 7 chromosomes from the sperm and the 7 chromosomes from the egg. This procedure makes sure that the child inherits the entire genetic makeup of both parents.
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In an interrupted mating experiment, the purpose of plating cells on a selective medium is _______.
A) to determine the genes present in the Hfr
B) to ensure that only recombinant genotypes are recovered
C) to eliminate all recipient cells
D) to ensure that conjugation has been completed
To ensure that only recombinant genotypes are recovered.
What is the aim of interrupted mating?Interrupted mating tests are done in order to trace the arrangement of genes on a chromosome. To solve these sorts of difficulties, it is necessary to understand how conjugation works and which cells can be donor cells. Interrupted mating studies employ the process of conjugation to map the order of genes on a bacterial chromosome. During conjugation, the donor cell’s chromosome is transported slowly via a sex pilus as a single linear strand until it enters the recipient cell. The chromosome has a distinct origin of transmission.
An interrupted gene (also known as a split gene) is one that has expressed parts of DNA called exons that are separated by unexpressed regions of DNA called introns (also called intervening regions). Exons offer coding instructions.
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Good land and production practices can help increase greenhouse gas emissions. Please select the best answer from the choices providedTrueFalse
Good land and production practices cannot help increase greenhouse gas emissions.
Greenhouse gas emissions are the gases that trap heat in the atmosphere, thereby warming the planet. Greenhouse gas emissions are primarily caused by human activities such as burning fossil fuels, deforestation, and agriculture. Good land and production practices can actually help reduce greenhouse gas emissions.
For example, conservation agriculture practices, agroforestry, and sustainable land management practices can help sequester carbon in the soil, reducing the amount of carbon dioxide in the atmosphere.
Similarly, sustainable livestock management, reducing food waste, and increasing the use of renewable energy sources can also contribute to reducing greenhouse gas emissions.
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which task would be most difficult for a 3-year-old child with down syndrome who has clinodactyly of the thumb (type iii) on the dominant hand?
Having fun in a warm bath,constructing a sandcastle,a crayon in your hand For just a 3-year-old child with A syndrome who has clinodactyly of a thumb (type III) just on dominant hand, the task would be the most difficult.
The finger bones' developmental flaw is the cause of clinodactyly. Due to this flaw, the bone takes the shape of a wedge rather than a typical rectangle. Numerous syndromes, including as ’s syndrome, Genetic disease, Turner syndrome, Fanconi anaemia, and others, can be linked to clinodactyly. The medical name for an unusually bent and curved finger is clinodactyly. The afflicted digit may cross over other fingers and curl to the side abnormally. One in four Down syndrome babies has the disorder, which is more common in the Down syndrome community (3%). (trisomy 21).
(Which task would be MOST DIFFICULT for a 3-year-old child with Down syndrome who has clinodactyly of the thumb (type III) on the dominant hand?)
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Prokaryotic cells are differentiated from eukaryotic cells because prokaryotic cells:
Select one:
a.
have no nuclei
b.
are much larger
c.
don’t have permeable membranes
d.
have lower rate of reproduction
Answer:
Eukaryotic cells are cells containing membrane-bound organelles and are the basis for both unicellular and multicellular organisms. In contrast, prokaryotic cells do not have any membrane-bound organelles and are always part of unicellular organisms.
One of the primary advantages of cell culture is the ability to isolate a single type of cell from a multicellular organism. how has this advance changed the study of biology?
This advance changed the study of biology as it allowed researchers to study the behavior, physiology, and biochemistry of individual cell types in isolation, which was not possible before.
The ability to isolate a single type of cell from a multicellular organism using cell culture has had a significant impact on the study of biology.
One of the most significant impacts of cell culture is the ability to study the properties and functions of different cell types, such as stem cells, cancer cells, and immune cells. This has greatly increased the understanding of cellular processes and has led to the development of new therapies for diseases.
Cell culture also enables scientists to study the effects of different chemicals, drugs, and genetic manipulations on cells in a controlled environment. This has led to the discovery of new drugs, and the optimization of their efficacy and safety.
Additionally, cell culture techniques have been used to create in vitro models of tissues and organs, which can be used to study the development and function of these structures.
In summary, cell culture has led to a greater understanding of cellular processes, the development of new therapies, and improved drug development. It has also greatly advanced the study of genetics, biochemistry, and pharmacology.
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the iris if the eye can have many colors, including brown, blue, green and hazel. how do you think polygenic inheritance explain why many iris colors are possible
The iris of the human eye can have many colors because this trait is controlled by polygenic inheritance. Polygenic traits are phenotypic traits controlled by two or more genes that have a subtle effect on trait variation.
Eye color follows a polygenic pattern of inheritance. Humans recognize nine eye colors. Expression of the eye color phenotype is controlled by two major genes and 14 additional genes associated with the X chromosome. Different combinations of these alleles produce different eye colors. Eye color is directly related to the amount of melanin in the anterior layer of the iris. Brown-eyed people have a lot of melanin in their irises, while blue-eyed people have much less of this pigment.
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only 4% of people have type ab blood. a) onaverage,howmanydonorsmustbecheckedto find someone with type ab blood?
Answer:
On average, you would need to check 25 donors to find someone with type AB blood, as it is only found in approximately 4% of the population.
although koch's postulates present a logical framework for establishing a particular microbe as the cause of a disease, they cannot always be applied today because blank . multiple choice question. it is unethical to use animals for medical testing virtually all pathogens have been identified some causative disease agents cannot be grown in pure culture molecular methods are much more reliable and rapid
Using molecular and genetic evidence, koch's postulates provide a justification for identifying a specific bacterium as the origin of an illness.
How well does genetic evidence lend credence to evolution?The shared origin of life is reflected in DNA as well as the genetic code. DNA comparisons can reveal how closely related different species are. Biogeography. The diversity of life on Earth is reflected in both the dispersion of organisms as well as the distinctive characteristics of island species.
What three places can you find genetic data?Mutation, recombination, and gene immigration are the three main causes of genetic variation.
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some hormones such as estrogen and testosterone are lipids and are therefore nonpolar. explain why a cell membrane receptor would not be needed for this type of ligand to activate a response in a cell.
Hormones such as estrogen and testosterone are lipids and are nonpolar, which means they are hydrophobic and can readily diffuse through the hydrophobic regions of the cell membrane.
Because of this property, they do not need a cell membrane receptor to activate a response in a cell. Instead, they can directly interact with intracellular receptors, such as those located in the cytoplasm or the nucleus, by passing through the cell membrane. This process is known as "passive diffusion," and it allows lipophilic molecules to cross the cell membrane without the need of a specific receptor. Cell membrane receptor would not be needed for this type of ligand to activate a response in a cell.
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What are the two main types of interactions that are studied in order to understand and solve environmental problems?
The two primary interactions that environmental scientists investigate are how we use natural resources and how human activities impact the environment.
An ecological community is a collection of populations of at least two distinct species that interact both directly and indirectly in a given geographic area, and within which organisms exist. Many characteristics and functions of ecosystems, like nutrient cycling and food webs, are based on interactions between species. Depending on the evolutionary setting and surrounding circumstances, these interactions can have a variety of different types. Because of this, the scale and context of ecological interactions between particular creatures and entire species can make them difficult to define and quantify. However, there are various classes of interactions between species that are present in a wide range of habitats and ecosystems.
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the length of the biologic width of tissue covering a tooth is approximately: group of answer choices a) 1 mm b) 2 mm c) 3 mm d) 4 mm
The correct option is b ; 2 mm ,Under local anesthesia, the biologic width can be determined by probing to the bone level (referred to as "sounding to bone") and subtracting the sulcus depth from the resulting value.
If this distance is smaller than 2 mm in one or more spots, a biologic width violation diagnosis can be validated.
The PDL's typical width ranges from 0.15 mm to 0.21 mm and may shrink with aging. 1,4 PDL widening is one of the most significant changes in the circumrenal structures and may be associated with a variety of disorders.
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Given that a human normally contains 46 chromosomes, give the chromosome number for each of the following conditions:
Turner syndrome (female, no Barr bodies)
Klinefelter syndrome (male, one Barr body)
Answer:
Turner syndrome = 45 chromosomes, Klinefelter syndrome = 47 chromosomes
Explanation:
Turner syndrome is a condition where a female's 23rd pair (the pair that determines sex) consists of only X, while Klinefelter is defined by a male's 23rd pair consisting of XXY.
What is the term for small structures within cells that perform specific functions (mitochondria, nucleus, etc.)?
Organelles is the term for small structures within cells that perform specific functions.
An organelle is a subcellular shape that has one or more specific jobs to carry out within the cell, much like an organ does inside the frame. a few of the extra important cell organelles are the nuclei, which save genetic information; mitochondria, which produce chemical strength; and ribosomes, which collect proteins.
An organelle is a specific structure inside a cellular, and there are numerous different styles of organelles. Organelles are also referred to as vesicles within a cellular. and they truely have a characteristic it really is critical, due to the fact we need to compartmentalize all of the functions in the cell. So there desires to be a membrane across the mechanisms for making a unique product within a cell.
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During the phase change you drew above, is thermal energy being added or removed?
a. Added
b. Removed
Answer:
Explanation:
Answer: A. Added. During a phase change, thermal energy is added to the system in order to break the intermolecular forces of the solid and allow the molecules to move freely and become a liquid. This addition of thermal energy causes an increase in temperature. As the molecules move more freely, they also release energy and the temperature begins to decrease until the molecules solidify again and the phase change is complete.
Answer:
Understand How Changes In Thermal Energy Affect Particle Motion, Temperature, And State Change :
Explanation:
Example Question #3. Explanation: The answer is "remove thermal energy." In order to change a gas to a liquid, you would have to cool it down, thus removing thermal energy.
how would the properties of water change if the water molecule were linear rather than bent? why would it be less satisfactory as the basis for living cells?
If the water molecule were linear rather than bent, it would not be able to form hydrogen bonds as easily, therefore making it less effective to participate in chemical reactions involving hydrogen bonding interactions.
If water were linear, it would not have a permanent dipole moment and would not be able to form hydrogen bonds as easily. This would make it less effective at dissolving polar substances and participating in chemical reactions involving hydrogen bonding. It would also be a poorer solvent for ionic compounds. These properties would make it less satisfactory as the basis for living cells because many biological molecules require a solvent that can effectively dissolve polar and ionic substances and participate in hydrogen bonding interactions.
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which modified root is this
pliz guys help me
The modified root in the diagram is a taproot.
How many modifications of roots are there?The main forms of root modifications are tap roots and adventitious roots. Some plants' roots change shape and become modified in order to absorb and transport water and minerals from the soil to various parts of the plant. They have also been modified for support, food storage, and breathing.
The root modifications serve two purposes: physiological and mechanical. A taproot is the main root of a primary root system that grows vertically downward. Most dicotyledonous plants, such as dandelions, produce taproots, and some, such as carrot and beet edible roots, are specialized for food storage. carrot.
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