9.3 m/s.........................
proteins that play a critical role in the development of many eukaryotic organisms usually have a highly conserved dna-binding motif called the motif.
the statement that proteins that play a critical role in the development of many eukaryotic organisms usually have a highly conserved dna-binding motif called the motif is True.
How does protein affect eukaryotic organisms?Protein synthesis is an essential process because humans rely on the body to produce the proteins required to perform essential functions. in the absence of protein synthesis, the body will be unable to produce hormones, enzymes, and even new muscle.
Protein-protein interactions are important in biology, and spectrometry has been used to identify interactions in a variety of organisms. As a short conserved sequence pattern associated with distinct protein or DNA functions, motif helps in protein DNA-binding to promote eukaryotic development.
The complete Question is:
Proteins that play a critical role in the development of many eukaryotic organisms usually have a highly conserved DNA-binding motif called the motif. a. True b. False
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Parasympathetic innervation to the ciliary muscle results in accommodation, which makes the lens more rounded to allow for close vision.
a. True
b. False
Parasympathetic innervation to the ciliary muscle results in accommodation, which makes the lens more rounded to allow for close vision.
The statement is true.
Option A is correct.
What is the ciliary muscle?The ciliary muscle is described as being elongated, triangular in shape, and located beneath the anterior sclera just posterior to the limbus.
The ciliary muscle functions are mainly instructed by the parasympathetic nerve fibers of oculomotor nerve (CN III).
When the ciliary muscle undergoes contraction, it loosens the zonular fibers increasing the convexity of the lens, which induces accommodation for near vision.
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which family is most likely to contain viruses that exist in a latent state in humans? group of answer choices herpesviridae papillomaviridae poxviridae hepadnaviridae adenoviridae
Herpes simplex, varicella zoster, Epstein-Barr, human cytomegalovirus, adenovirus, and Kaposi's sarcoma are a few examples of latent viral infections in humans. A latent viral infection is one in which the virus persists in the host cell for a protracted length of time without causing an infection.
Almost all individuals are infected by herpesviruses, which develop lifelong latency and can reactivate to infect new victims. These viruses are referred to as "latent," and they include the Epstein-Barr virus (EBV), varicella-zoster virus (VZV), HIV, herpesviruses, and cytomegalovirus (CMV). Latent viruses can induce momentary (temporary) symptoms or chronic disease when they "reactivate," or come out of hiding. Many viruses have a tendency to lead to latent infections. Herpes simplex virus (HSV)-1, HSV-2, varicella zoster virus (VZV), and Epstein-Barr virus make up the majority of these pathogens.
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Why is it vital that your friend reviews his credit report? how soon would you recommend he does so and why?
Answer:
10 days after checking the first time
Explanation:
There are four mechanisms that can cause changes in the frequencies of genes in populations: mutation, migration, genetic drift, and natural selection. All four are mechanisms of evolutionary change. Compare natural selection to the other mechanisms for change. What choice best differentiates natural selection from the other mechanisms?.
The choice which best differentiates natural selection from the other mechanisms is that it is variation in any population, differential reproduction occurs and is not random as it occurs over time and more advantageous trait exists in the population which is therefore denoted as option D.
What is Population?This is defined as the total number of organisms which are present in an area over a given period of time.
Natural selection on the other hand is however unique and different from the other mechanisms that can cause changes in the frequencies of genes in population as it doesn't occur randomly and represents only positive change/adaptation thereby making option D the correct choice.
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The options are:
A) In a population, it is the changes in allelic frequencies of a gene that are due to chance.
B) A random error/change in the DNA sequence. These may be inherited or occur in cells during the lifetime of the organism
C) Also known as gene flow. It is any movement of individuals and/or the genetic material they carry, from one population to another.
D) There is variation in any population differential reproduction occurs and is not random as it occurs over time and more advantageous trait exists in the population.
For bacteriophages and animal viruses ________ is the step in the viral life cycle that determines host cell or tissue specificity.
For bacteriophages and animal viruses attachment is the step in the viral life cycle that determines host cell or tissue specificity.
Bacteriophage is a virus capable of infecting bacterial cells. The lytic cycle allows it to enter the host cell. The virus within that bacterial cell could even destroy or replicate without killing the host cell. The bacteriophage attaches to the bacterium via its long tail fibers, and then installs its genetic material into the host cell to begin reproduction. Bacteriophages enter the host cell by injecting DNA, whereas animal viruses enter via endocytosis or membrane fusion. Animal viruses can enter latency, which is similar to bacteriophage lysogeny.
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Why did the big bang not produce a significant proportion of elements heavier than helium?
Because the temperature was too low for heavier elements to form by the time helium could live, the Big Bang does not yield heavier elements.
A bottleneck in the Big Bang nucleosynthesis, the lack of a stable nucleus with 8 or 5 nucleons, led to the production of extremely few nuclei of elements heavier than lithium. The quantity of lithium-7 created during BBN was likewise constrained by this deficiency of bigger atoms. It took many minutes for elements to develop in the early cosmos because it was too hot. Only a brief window of time remained for elements to develop before it became too cold to continue nucleosynthesis.
In light of this, we can conclude that the Big Bang did not result in the formation of heavier elements since, by the time helium could live, the temperature had dropped too low for heavier elements to develop.
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in the __________ division of the ans, the preganglionic nerve fibers are short, while in the __________ division, the preganglionic fibers are relatively long.
In the sympathetic division of the ans, the preganglionic nerve fibers are short, while in the parasympathetic division, the preganglionic fibers are relatively long.
What are nerve fibers?A nerve fiber, also called an axon, is described as a long and slender projection of nerve cells (or neurons) that carry electrical impulses away from the nerve cell body.
In conclusion, neural divergence is extensive in the sympathetic division of the ANS, while in the parasympathetic division, divergence is minimal.
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an error that can occur during meiosis or mitosis; it results in one daughter cell receiving two copies of a particular chromosomes while the other daughter cell receives none.
Non-disjunction is the error that can occur during meiosis or mitosis that results in one daughter cell receiving two copies of a particular chromosomes while the other daughter cell receives none.
In the field of biology, non-disjunction can be described as an error in which the chromosomes are unable to separate during the anaphase of the cell division process.
A non-disjunction can occur during mitosis or meiosis when one of the daughter cells receives two chromosomes instead of one. As a result, the other daughter cell will get no chromosome.
Non-disjunction errors will cause serious diseases or syndromes in individuals as one of the daughter cells has an extra chromosome and the other one has missing chromosomes.
The question will correctly be written as:
An error that can occur during meiosis or mitosis; it results in one daughter cell receiving two copies of a particular chromosomes while the other daughter cell receives none is called?
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Which type of ion channel opens and closes in response to changes in the membrane potential?
Voltage ion channel opens and closes in response to changes in the membrane potential.
Numerous membrane proteins that function as ion channels are embedded throughout the plasma membrane. Only specific kinds of ions can traverse each channel in the membrane. The majority of channels are one-ion specific (selective). Because the channel pore is often so narrow, ions must go in single file through it.
A channel can exist in a number of states, each of which is either open or closed and corresponds to a different protein shape. In general, closed states are either a result of the pore contracting, blocking the ion's passage, or the pore being stopped up by a different portion of the protein. When a channel is open, ions move down the transmembrane concentration gradient for that specific ion to pass through the channel pore. The maximal channel conductance and electrochemical driving force for that ion dictate the rate of ionic flow across the channel.
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The symptoms of diphtheria are due to an exotoxin that blocks proteins synthesis in host cells.
a. True
b. False
The symptoms of diphtheria are due to an exotoxin that blocks proteins synthesis in host cells is true.
So the correct answer is option B.
The pathogenic bacteria Corynebacterium diphtheriae, which secretes the exotoxin diphtheria toxin, is what causes diphtheria. The corynephage prophage, which infects cells and prevents protein synthesis, is what causes disease in humans. It carries the toxin gene.
A-B toxin or diphtheria toxin is a single polypeptide chain of 535 amino acids that is made up of two subunits connected by disulfide bridges. The A subunit of the protein, which is more stable, enters the host cell after the B subunit, which is less stable, adheres to the cell surface.
To 2.5 ngstrom resolution, the crystal structure of the homodimer of diphtheria toxin has been established. Three domains make up the Y-shaped molecule that the structure has shown.
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ascending pathways conduct sensory information upward toward the brain, typically through a relay chain of 3 successive neurons. the neurons in these sensory pathways are called the first-order, second-order and third-order neurons, respectively. select the true statement regarding first-order neurons in somatosensory pathways.
a. First-order neuron cell bodies reside in a ganglion.
b. First-order neurons have cell bodies in the thalamus.
c. First-order neuron cell bodies reside in the dorsal horn of the spinal cord.
d. First-order neuron cell bodies reside in the anterior horn of the spinal cord.
The accurate description of first-order neurons in somatosensory pathways is that they are housed in ganglions (option a).
What exactly are neurons? What do they do?The building blocks of the brain and nervous system, neurons are the cells in charge of receiving sensory information from the outside world, sending motor commands to our muscles, and converting and relaying electrical signals at each stage along the way.
The importance of the neuronInformation is transported throughout the body of an individual through neurons. They aid in the coordination of all vital life-supporting processes by sending electrical and chemical signals. We define neurons and describe their function in this article.
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The main compound used to release energy for metabolism is:
a. NAD+.
b. sucrose.
c. ribonucleic acid.
d. glucose phosphate.
e. adenosine triphosphate.
Adenosine triphosphate is the key substance utilized to release energy for metabolism. The right response, in this case, is option E.
Adenosine triphosphate serves as the source of energy for cells to both use and store. The three serially connected phosphate groups, a nitrogenous base, and a ribose sugar make up the nucleoside triphosphate structure of ATP.
Due to the oxygen atoms' attraction to the phosphate group in the structure of adenosine triphosphate, sometimes referred to as ATP, the molecule has a high energy level.
For instance, ATP is needed to keep your heart beating and to breathe. Additionally, ATP aids in the synthesis of lipids, nerve impulses, and the transport of certain chemicals into and out of cells. Even ATP is used by certain creatures to create light, such as bioluminescent jellyfish and fireflies.
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The chart shows the path reactants take to become products.
Which statement best describes the chart?
Heat was removed from the activation energy to create the product.
Heat was added to create the product.
The products have less energy than the reactants.
The products have the same energy as the reactants.
The statement which best describes the chart is Heat was added to create the product.
What is activation energy?
In the potential energy diagram, the height of the hill between the reactants and the products represents the activation energy for a reaction. The activation energy barrier is another name for the activation energy of a reaction. It is denoted by Ea.
How to reach the activation energy barrier?
Molecules become more energetic and move more quickly as the temperature rises. Therefore, the likelihood that molecules will be moving with the required activation energy for a reaction to occur upon collision increases with increasing temperature.
The statement which best describes the chart is Heat was added to create the product.
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Answer: B.Heat was added to create the product.
On Isle Royale, if the moose population is very high, what would you expect to see with regard to other populations?
- Increasing wolf population
- decreasing tick population
- increasing tree ring width
- all of the above
- none of the above
On Isle Royale, if the moose population is very high, all of these are expected to see with regard to other populations.
The study of genetic variation within and between populations, as well as the evolutionary factors that explain this variation, is known as population genetics. It is based on the Hardy-Weinberg law, which holds true as long as population size is large, mating is random, and mutation, selection, and migration are insignificant.
Population genetics is a branch of genetics that studies genetic differences within and between populations. It is related to evolutionary biology. This branch of biology investigates phenomena such as adaptation, speciation, and population structure. The goal of population genetics is to explain behavioral differences between individuals in a given population. Behavior geneticists work to better understand the genetic and environmental factors that contribute to these differences.
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tiny, one-celled organisms that are neither plants nor animals. they are involved in infectious disease and decay. they live nearly everywhere on planet earth, including in the human body.
a. bacteria
b. DNA
c. genome
d. immunity
Bacteria are tiny, single-celled creatures. Bacteria, which are vital to world's ecosystems, are present almost everywhere.
How do bacteria work?Bacteria are little, one-celled organisms. The world's ecosystems depend on bacteria, which are found practically everywhere. Some species can survive in the environment with high pressure and temperatures. In fact, it's thought that the number of bacterial cells in the human body exceeds that of human cells. The majority of the body's bacteria are beneficial, though not entirely harmless. The cause of disease is one of a relatively small number of organisms.
Microorganisms called bacteria occur in variety of forms. They could appear as spirals, rods, or spheres. It is true that certain bacteria are pathogenic, or harmful, and cause disease, but some bacteria are also helpful. For instance, the bacteria in our gut and digestive tract are essential for our bodies to function normally. Bacteria make up a staggering 10 times more cells in our bodies than human cells, which is an amazing fact. Bacteria are also essential to biotechnology. They are essential in that they will help the body regain its ability to maintain health.
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i need help with this
Answer:
-cells
-tissues
-organs
-organ systems
Explanation:
Cells are the building blocks of life, so are relatively very small. Tissues are made of cells, and organs are made of tissue. And of course, organ systems are organs working together.
which immunoglobulin type is found as a dimer form in mucous secretions, linked together by a joining chain protein and a secretory component?
The most common immunoglobulin isotype found on mucosal surfaces is secretory immunoglobulin A (IgA).
Two IgA molecules (dimeric IgA), a joining protein (J chain), and a secretory component make up secretory IgA. (SC).
Your immune system produces an antibody called immunoglobulin A (IgA). Mucous membranes, particularly those in the digestive and respiratory systems, contain IgA. Saliva, tears, and breast milk all contain it. A hereditary health condition called IgA deficiency can be handed down through generations.
IgA has long been considered a non-inflammatory antibody at mucosal locations. sIgA is concentrated in the mucus out layer [46] because of its polymeric structure and the oligosaccharide side chains of SC, which noncovalently cross-link microorganisms and encourage them to clump together in situ.
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a researcher is conducting a phylogenetic study of organisms using genea. in several of the species she is examining, she retrieves three different but similar gene sequences using the same primers. what should she conclude from her results?
Phylogenetic studies using gene A in several species by taking three different but similar gene sequences show that gene A has received gene duplication in several species.
Phylogeny is a description of the classification that shows the kinship relationship of a species with its ancestors and the evolutionary relationship between organisms. The purpose of a phylogenetic study is to determine the classification and conclude the phylogeny from the relevant data by comparing the variable characteristics of organisms.
The phylogenetic relationship of a species can be determined based on mitochondrial DNA sequences. Mitochondrial DNA can generate data quickly and consistently. In several species, phylogenetic studies were carried out by researchers showing three different but similar gene sequences, namely using the same primer. This shows that there has been duplication of genes in some of these species that they have a kinship of the same ancestral species.
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What is the correct order the layers of the wall of the digestive tract starting with the innermost layer.
The digestive tract is composed of layers of tissue which provide protection and aid in the digestion of food. Starting with the innermost layer, these layers are:
MucosaSubmucosaMuscularisSerosaThe Innermost Layers of the Digestive Tract Wall: An Orderly GuideThe mucosa is the innermost layer of the digestive tract, and it is made up of epithelial cells that secrete digestive enzymes and absorb nutrients. The submucosa is a layer of connective tissue that provides support to the mucosa and contains small blood vessels and lymphatic vessels. The muscularis layer contains smooth muscle that helps move the contents of the digestive tract along. The serosa is the outermost layer of the digestive tract and is composed of a thin layer of connective tissue that helps protect the digestive tract from injury.Each layer has its own unique purpose and contributes to the overall functioning of the digestive tract.
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What energy does burning hydrocarbons release?
When hydrocarbons are burned with oxygen present, carbon dioxide and water are produced. Carbon monoxide may also be released during the burning of hydrocarbons if there is an imbalance between the amount of carbon and oxygen present.
The energy of the bonds in hydrocarbons is larger than the sum of the energies of the bonds in carbohydrates, hence burning a hydrocarbon will release more energy than burning an equivalent amount of carbohydrates.
The chemical bonds that bind the carbon and hydrogen atoms together are where energy is stored. Bonds are broken and new bonds are created when the atoms are rearranged during the combustion event, releasing energy.
Currently, the primary source of energy for the production of electric power, heating, and transportation is the burning of hydrocarbons.
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describe relationships between concentration, ph, temperature, and enzyme activity and how results relate to conditions in the human body
A reaction is typically sped up by increasing temperature and slowed down by reducing temperature. An ideal pH range exists for each enzyme. Enzyme activity will be slowed by pH changes outside of this range.
Specifically, enzymes. Normally, just one or a few substrates can trigger an enzyme's reaction. Only one type of substrate will be accepted by some enzymes, which are more selective than others. Other enzymes can interact with a variety of molecules as long as they possess the chemical group or type of bond that the enzyme is looking for. Enzymes can be reused. Since enzymes are not reactants, they are not depleted by the process. An enzyme can be employed for another process after it has catalysed one by binding to a substrate and then being released, unmodified.
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Explain the relationship between photosynthesis and cellular respiration.
In the process of photosynthesis, oxygen and glucose are produced from water and carbon dioxide. As a consequence of consuming glucose, the plant creates oxygen.
What relation in photosynthesis and cellular respiration?Cellular respiration results in the conversion of oxygen and glucose into water and carbon dioxide. Carbon dioxide, water, and ATP, which is converted into energy, are all byproducts of the process.
During photosynthesis, glucose, and oxygen are created from carbon dioxide and water; while, during respiration, glucose, and oxygen are created from carbon dioxide and water.
Therefore, In the ecosystem, photosynthesis and respiration are complementary reactions.
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What is meiosis and mitosis simple definition?
Mitosis is a type of cell division for somatic cells and for the asexual reproduction of unicellular eukaryotic cells.
Meiosis is the type of cell division for the production of gametes in sexual reproduction . Meiosis is the process through which egg and sperm cells are formed. Mitosis is a necessary step for life.
A cell copies all of its components, including its chromosomes, and separates to generate two identical daughter cells during mitosis.
Meiosis is a form of cell division that occurs in sexually reproducing organisms and results in a reduction in the number of chromosomes in gametes (the sex cells, or egg and sperm).
Mitosis is the division of a single cell into two identical daughter cells (cell division).
Mitosis is a kind of cell division that occurs in somatic cells as well as in unicellular eukaryotic cells during asexual reproduction. Meiosis is a sort of cell division that occurs during sexual reproduction to produce gametes.
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which of the following is not a shape seen in prokaryotes? a) spheres b) rods c) spirals d) icosanedrals
Answer:D
Explanation:A. Spheres B. Rods C. Spirals D. Icosahedrons
An immune deficiency causes a severe reduction in the amount of mhc-ii expressed on the surface of professional antigen-presenting cells. predict which immune processes will be significantly impacted by this deficiency.
a. true
b. false
True, immune deficiency causes a severe reduction in the amount of mhc-ii expressed on the surface of professional antigen-presenting cells. predict which immune processes will be significantly impacted by this deficiency.
In general ,the main function of major histocompatibility complex (MHC) class II molecules is to derive the refined antigens, which are derived primarily from exogenous sources, to CD4(+) T-lymphocytes. we can also say that MHC class II molecules are critical for the initiation of the antigen-specific immune response.
Hence, Major histocompatibility complex (MHC) class I and class II proteins are important to play a key role in the active response of the immune system.
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what is the evidence that nociception is mediated by specific nociceptors rather than by strongly stimulated tactile receptors or warm receptors?
The evidence is that Nociceptive ache is a kind of ache due to harm to frame tissue and firmed by the specific nociceptors by the Nociceptive ache feels sharp, aching, or throbbing.
It's frequently due to an outside injury, like stubbing your toe, having a sports activities injury, or a dental procedure. Nociception is the detection of painful stimuli. Specialized neurons withinside the dorsal root ganglia (DRG) or the trigeminal ganglia venture into pores and skin and tender tissue to discover extremes of warmness, cold, mechanical, and chemical alerts and alert the frame of ability dangers.
Experimental demonstration that nociception includes specialised neurons, now no longer truely more discharge of the neurons that reply to regular stimulus intensities. So it is now no longer as though while the warmth receptors get a stimulus beyond a sure factor they begin to sign ache, as a substitute the nociceptors responding to warmness are definitely separate and feature a far better threshold that alerts the ability for tissue harm.
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the auditory sensory axons of the____branch of cranial nerve number____terminate in the cochlear nucleus within the brainstem.
The auditory sensory axons of the vestibulocochlear branch of cranial nerve number 8 (CN VIII) terminate in the cochlear nucleus within the brainstem.
The vestibulocochlear nerve, also known as the auditory nerve or auditory vestibular nerve, is a mixed nerve that carries sensory information from the inner ear to the brain. It is divided into two branches: the vestibular branch, which carries information about balance and spatial orientation, and the cochlear branch, which carries information about sound.
The cochlear branch contains the axons of sensory neurons that are responsible for detecting sound waves and transmitting this information to the brain. These axons terminate in the cochlear nucleus, a region of the brainstem that plays a crucial role in processing auditory information.
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if tow parent are heterozygous for a recessive disease what is the change their child will also be a heterozygous carrier for this disease
The chance the child will also be a heterozygous carrier for this disease is about 50%.
When one allele of a gene effectively outweighs the other (recessive) allele, the allele is said to be dominant. When an allele requires two copies of itself to be expressed, the allele is said to be recessive.
Here, the parents are heterozygous, which means they have one dominant allele and one recessive allele. Let's consider B as a dominant allele and b as a recessive allele. If we cross the parents' having a heterozygous allele, the chance that the child also has a heterozygous allele is given by the attached Punnett square.
Here, the probability of homozygous dominance is 25%, the heterozygous carrier is 50%, and the homozygous recessive is 25%. From this, we can conclude that the chance of a child being a heterozygous carrier for this disease is about 50%.
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A researcher is conducting a phylogenetic study of organisms using GeneA. In several of the species she is examining, she retrieves three different but similar gene sequences using the same primers. What should she conclude from her results?
-She has contamination in her experiments and should start over.
-GeneA has undergone a gene duplication in several species.
-GeneA is currently evolving in those species she found different sequences. It will be found as a different sequence in different tissues.
-GeneA has different alleles in some species.
-It is impossible to tell from the given information.
She has contamination in her experiments and should start over.
In biology, phylogeny is the study of evolutionary history and relationships between or within biomes. These relationships are determined by phylogenetic methods that focus on observed genetic traits such as DNA sequence, protein amino acid sequence, or morphology.
The phylogeny of animals in relation to the evolution of animal organs. This type of diagram allows us to infer the evolutionary relationships of major animal lineages based on the organ level of the tissue.
Phylogeny can be described as the relationship between all organisms on Earth descended from a common ancestor, whether extinct or extant.
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