Clayton incurred a spinal cord injury, and the doctors wanted to enroll him in a clinical trial that used stem cells in the treatment. stem cells are special because they can turn into other specialized cells in the body.
What is stem cells for?Stem cells are used in stem cell transplants to replace cells lost by chemotherapy or disease, or to help the donor's immune system fight certain types of cancer and blood-related diseases such as leukemia, lymphoma, neuroblastoma, and multiple myeloma.
Where are stem cells found?In the bone marrow
Stem cells are usually found in bone marrow (the spongy center of certain bones). This is where they divide in order to produce new blood cells. Once mature, blood cells depart the bone marrow and into the bloodstream. A tiny number of immature stem cells enter the bloodstream.
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in which of these types of environment would you be most likely to find examples of ongoing speciation? group of answer choices areas such as large plains that facilitate migration of animals areas that have a large range of altitudes, such as mountains and deep valleys areas that are species-rich areas that have undergone recent environmental disturbance or change
The environment where ongoing speciation is most likely to be found is: areas that have undergone recent environmental disturbance or change.
Speciation is the process of formation of new species. This is the result of evolution. A new species is born form an existing species due to some new adaptations or changes. The newly formed species is reproductively isolated from the ancestral one.
Environmental disturbances are the sudden changes in an area that disturbs the species of that area. This results in the loss of species. However, environmental disturbance also provides the opportunity for speciation as the surviving species need to undergo certain changes in order to keep surviving.
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How do the tails account for the hydrophobic nature of fats? (See Concept 3.2.)
The tails account for the hydrophobic nature of fats as a result of it consisting of carbon and hydrogen atoms which are non polar thereby making it a hydrophobic molecule.
What is a Phospholipid?This refers to a biomolecule which forms a major part of the cell membrane and consists of compounds which include the following below:
Two fatty acidsA glycerol unit.A phosphate group.It consists of two parts which are hydrophilic head and the hydrophobic tail. The tail of the phospholipid is hydrophobic which is the reason why they face the inside which is away from the water.
They however meet in the inner region of the membrane which is why they are regarded as the water fearing part of the molecule. On the other hand, the hydrophilic head is referred to as the water loving part because it consists of phosphate-containing group that is attached to a glycerol thereby making it polar.
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Mitochondria and chloroplasts are the other organelles besides the nucleus that contain __________.
Mitochondria and chloroplasts are the other organelles besides the nucleus that contain DNA.
What is DNA?This is also called deoxyribonucleic acid and is known as the genetic material of living organisms. DNA is responsible for the passing of different types of traits from parent to offspring.
DNA is present in organelles such as mitochondria and chloroplasts as they are involved in the different types of growth and reproductive processes which occurs in the cells of organisms. It is also present in the nucleus of cells because it controls and regulates the metabolic activities which occur in the cell.
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Which of the following respiratory systems is not closely associated with a blood supply? a. the lungs of a vertebrate b. the gills of a fish c. the tracheal system of an insect d. the skin of an earthworm
The correct option is (c) Tracheal system of an insect
Tracheal system of an insect is not closely associated with a blood supply.
Describe respiratory system of insect.An insect's respiratory system is a biological mechanism that it uses to exchange gases after introducing them into its core. Blood is not involved in the exchange of gases because they take place directly between the tracheae and tissues. Insects' respiratory systems receive air via a network of exterior apertures known as spiracles. These exterior apertures, which in certain insects serve as muscle valves, connect to the tracheae, an intricate network of tubes that make up the respiratory system inside the body. This system's network of transverse and longitudinal tracheae balances pressure.Learn more about the respiratory system of insects with the help of the given link:
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List and provide examples of three types of phosphorylation reactions that generate atp.
Three examples of phosphorylation are glucose phosphorylation, protein phosphorylation andand oxidative phosphorylation.
How many types of phosphorylation are there ?The conversion of ADP to ATP can occur through two kinds of phosphorylation. Oxidative phosphorylation and substrate level phosphorylation . The primary difference between these two processes lies in the source of the free energy used to drive phosphorylation.
So ,the three examples of phosphorylation are oxidative, protein and glucose phosphorylation.
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Question 7 of 10
Which step is part of the engineering design process but is not part of a
scientific investigation?
A. Identifying criteria and constraints
B. Solving a problem
C. Performing tests
D. Using math and measurements
The step that is part of the engineering design process but is not part of a scientific investigation is solving a problem (Option B is correct).
What is the scientific method?The scientific method is a series of sequential steps used to collect empirical evidence and thus test hypotheses, which is used both in science and engineering (but engineering also involves solving a given problem).
In conclusion, the step that is part of the engineering design process but is not part of a scientific investigation is solving a problem (Option B is correct).
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How are the structures of a GPCR and an RTK similar? How does initiation of signal transduction differ for these two types of receptors?
Cell signaling is the process that happens in the cell when the receptors on the cell's surface detect a sort of stimulus, whether it is physical or chemical in nature.
The receptor will provide a conduit for these signals to enter the cell and be processed. After binding with the ligand, the G protein-coupled receptors (GPCR) and the protein-tyrosine kinase receptor (PTKR) are present on the cell's surface to form pathways for signal transmission.
The following are the differences in the responses of these two receptors:
The response of a GPCR to a ligand causes this receptor to activate a protein known as the G protein. In contrast, binding of the ligand to the receptor tyrosine kinase causes it to form dimers with another receptor, resulting in tyrosine kinase enzyme activity.The GPCR activates the protein by tethering it to GTP via a guanine exchange factor protein. The tyrosine kinase receptor, on the other hand, requires ATP hydrolysis to activate the enzyme.To learn more about signal transduction for GPCER and RTK. Click, https://brainly.com/question/15093633
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Would the coupling of the processes shown in Figure 17.23 be found in a eukaryotic cell? Explain why or why not.
Answer: No, transcription and translation are separated in space and time in the eukaryotic cell, a result of the eukaryotic cell's nuclear compartment
Explanation:
The nurse counsels the pregnant patient to expect which changes in the respiratory system?
The nurse counsels the pregnant patient to expect the following changes in the respiratory system: The total circumference of the chest cage increases by 6 cm, There is a decrease in the vertical diameter of the thoracic cage, The patient has an increased awareness of the need to breathe.
What is a respiratory system?A respiratory system can be defined as the system that enables the process called inhalation and exhalation to take place.
Inhalation is the process that enables us to breath in and exhalation is the process that enables us to breath out. this two process are important as they are what enables us to live.
The nurse should endeavor to tell the pregnant woman to expect the following changes:
The total circumference of the chest cage increases by 6 cm.There is a decrease in the vertical diameter of the thoracic cage.The patient has an increased awareness of the need to breathe.Therefore the correct options are: B,C,D.
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The complete question is:
The nurse counsels the pregnant patient to expect which changes in the respiratory system? Select all that apply.
a. The chest cage ligaments tighten and restrict full expansion.
b. The total circumference of the chest cage increases by 6 cm.
c. There is a decrease in the vertical diameter of the thoracic cage.
d. The patient has an increased awareness of the need to breathe.
e. The elevation of the diaphragm leads to a decrease in the tidal volume.
What type of vegetation would you expect to find on an abandoned farm that has remained undisturbed for 150 years?.
A mature oak forest of vegetation would you expect to find on an abandoned farm that has remained undisturbed for 150 years. Although it may only live for 600 years on many settings, oaks can thrive for 1,000 years.
Although many will exhibit ancient features as early as 300 years, oak is only classified as ancient after 400 years. A senior oak typically has between 150 and 300 years of age, whereas a noted oak has between 150 and 200vegetation. According to legend, the Pechanga great oak, California, is the oldest living oak in the world and may have existed for at least 2000 years.
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the small dots are composed of
Answer: matter
Explanation:
every thing is composed of matter
The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues.
The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound. The test get progressively faster as it continues until the student reaches their max lap score.
The PACER Test score is combined in the FitnessGram software with scores for muscular strength, endurance, flexibility and body composition to determine whether a student is in the Healthy Fitness Zone™ or the Needs Improvement Zone™.
________ is a useful technique in criminal investigations because humans contain many copies of repeating or junk sequences, the length of which can be unique to an individual.
DNA fingerprint is a useful technique in criminal investigations because humans contain many copies of repeating or junk sequences, the length of which can be unique to an individual.
What is DNA fingerprinting?
A DNA fingerprint is a technic that helps identify individuals based on their DNA profilesAlthough most of the human DNA sequences are common in most of the humans, there are several that can vary substantially from individual to individual called variable number tandem repeats. As they vary so much from individual to individual, by comparison of the testing DNA with the DNA of any , it is easy to relate whether both sequences are correspondent to each other.So, DNA fingerprint is a useful technique in criminal investigations because humans contain many copies of repeating or junk sequences, the length of which can be unique to an individual.
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Which instruction would the nurse provide a client needing to collect a clean-catch urine specimen?
The instruction which the nurse would provide a client needing to collect a clean-catch urine specimen is "Do not touch the inside of the container" and is denoted as option C.
What is a Specimen?This is defined as a material or organism which are used for examination or study and can be collected using various means.
Collecting a clean-catch urine specimen means that there should be very minimal bacteria from the skin in the sample which is the reason why the inside of the container shouldn't be touched.
This is therefore why option C was chosen as the most appropriate choice.
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The options are:
"Save all urine for 24 hours.""Use the sponges to cleanse the urethra, and then initiate voiding directly into the cup.""Do not touch the inside of the container.""You will receive an isotope injection, then I will collect your urine."Why is having a larger population of the organisms found at the bottom of this pyramid important?
There is decrease in energy levels as we move to each trophic level. Thus, to support the ecological pyramids large numbers of population is found at the bottom of the pyramid.
What are trophic levels?Trophic levels are food pyramids. It describes the level of an organism present in the food web. These trophic levels are represented in the form of pyramids.
There are three to four successive trophic levels in the food pyramid where the organisms of one level are dependent on the other. These food pyramids are always upright. Trophic levels also show the energy transfer in an ecosystem.
Thus, trophic levels are important for depicting food and energy relationship in an ecosystem.
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brain training programs, which are used to reverse cognitive decline seen in aging, capitalize on the brain’s lifelong capacity to reorganize cortical tissue, which aligns with baltes’ key principle of lifespan development that .
Brain training programs, which are used to reverse cognitive decline seen in aging, capitalize on the brain's lifelong capacity to reorganize cortical tissue, which aligns with Baltes' key principle of lifespan development that development is plastic.
What is bran training program?A program of routine exercises called "brain training" claims to maintain or enhance one's cognitive ability. Working memory and executive function are two examples of fluid intelligence skills that are typically referred to as "cognitive abilities."
Development is plastic, which refers to the malleability or alterability of features. Contextual and socio-cultural factors affect development. Development involves multiple disciplines.
Therefore, Brain training programs, which are used to reverse cognitive decline seen in aging, capitalize on the brain's lifelong capacity to reorganize cortical tissue, which aligns with Baltes' key principle of lifespan development that development is plastic.
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Brain training programs, which are used to reverse cognitive decline seen in aging, capitalize on the brain's lifelong capacity to reorganize cortical tissue, which aligns with Baltes' key principle of lifespan development that ________.
What do plant cells posses that animal cells lack
cell membrane
cell wall
nucleus
cytoplasm
Answer: Only plant cells have chloroplast and cell wall
Explanation:
Which organisms are members of the lophotrochozoan lineage? group of answer choices
a. mollusks
b. echinoderms
c. sponges
d. insects
e. cnidarians
Annelids, mollusks, bryozoans, brachiopods, platyhelminthes, and other creatures that descended from these organisms' common ancestor are included in the monophyletic group of animals known as Lophotrochozoa. Thus, option A is correct.
What is lophotrochozoan lineage?Mollusks, such as snails, clams, and octopuses, as well as annelids, such as leeches and earthworms, are included in the diverse group of creatures known as lophotrochozoans.
As opposed to the diploblastic cnidarians, which have an embryonic mesoderm sandwiched between their ectoderm and endoderm, lophotrochozoans are triloblastic.
These phyla are similarly bilaterally symmetrical; a longitudinal section of them will separate them into symmetrical right and left sides.
Therefore, mollusks are members of the lophotrochozoan lineage.
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Jane was in a bike accident, not wearing a helmet. now she has trouble producing language. what part of her brain was most likely damaged?
If Jane was a bike accident that damaged her brain and now she has trouble producing language, then the most likely damaged part of her brain is Broca's area.
What is Broca's area?The Broca's area is a region of the brain directly associated with speech which is found near the motor cerebral cortex area in the inferior frontal gyrus.
Broca area is mainly implicated in roles such as the speech and therefore health complications in this brain region are associated with language problems.
In conclusion, if Jane was a bike accident that damaged her brain and now she has trouble producing language, then the most likely damaged part of her brain is Broca's area.
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Molecular chaperones can work by creating an ""isolation chamber. "" what is the purpose of this chamber?.
Molecular chaperones can work by creating an ""isolation chamber. "" The purpose of this chamber is to separate the unfolded protein from interacting with other proteins in the cytosol, until it is complete folded.
Molecular chaperones are the proteins are involved in various purposes inside the cell. The most essential function of chaperones is to regulate the proper folding of the proteins. They also regulate the proteins that are misfolded. The example of chaperones are heat-shock proteins.
Proteins are the polymers of amino acids that are involved in various activities of the cell. These are formed by the translation of the m-RNA. Proteins are most essential for the body-building and repair of the damaged tissues.
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The observations and hypotheses that arise from epidemiology can be tested through?
Answer:
clinical trials
Explanation:
observations and hypotheses arise from epidemiology can be tested using. clinical trials. studies that explore the effects of altering people's diets.
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interspecies recombination, and not de novo mutation, maintains virulence after β-lactam resistance acquisition in streptococcus pneumoniae.
Infections caused by Streptococcus pneumoniae (the pneumococcus) remain a leading cause of death worldwide in children under the age of five.
This nasopharyngeal commensal and respiratory pathogen cause a range of severe infections in both infants and adults, including pneumonia, sepsis, and meningitis.
As pneumococcus is endemic worldwide, its ability to develop antibiotic resistance is a global challenge (Appelbaum, 1987). High levels of resistance have been observed in Africa.
There are two main mechanisms by which pneumococci gain antibiotic resistance: the modification of core genes encoding antibiotic targets, often through homologous recombination, and the acquisition of specialized resistance genes on mobile genetic elements (MGEs).
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If all of the detritus leaving the marsh is plant material, what proportion of all net primary production leaves the marsh as detritus each year?
If all of the detritus leaving the marsh is plant material, 56% proportion of all net primary production leaves the marsh as detritus each year
Detritus, as opposed to dissolved organic material, is dead particulate organic material in biology. Detritus typically consists of feces and the carcasses or remains of dead organisms. Communities of microbes that colonize and breakdown (i.e., remineralizer) detritus are frequently found in it. It exists as leaf litter and other organic debris in terrestrial habitats.
When these detritus feeders ingest detritus with microorganisms proliferating on it, they mostly digest and absorb the protein-rich microorganisms and excrete the detritus, which is primarily composed of complex carbohydrates, with hardly any of it having been broken down.
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Which nutrient is required for regulating metabolism and maintaining normal growth?
Magnesium is required for regulating metabolism and maintaining normal growth both in plants and animals.
In plants, magnesium is the primary element in the chlorophyll of plant tissues and plays an important part in metabolism.
Plants deficient in magnesium are deficient in chlorophyll which results in less optimal growth and also activates enzyme system.
While in humans, this nutrient is vital as it forms antibodies which are the key ingredients of the immune system.
Moreover, in adolescents, it promotes bone growth, and also helps to build healthy and strong muscles.
It also regulates cardiovascular functions, immune system and hormones which are crucial for healthy functioning of the body
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Living things do all of the following except
Answer: pass an identical genetic code to their offspring for many generations.
Explanation:
Food stored in warm, moist places will decay than food stored in cool, dry places.
Warm and moist conditions are the most ideal for decomposition of organic matter and decay of food instead of cool and dry places.
Food spoilage is a result of both natural food degradation and contamination from microbes including bacteria, moulds, and yeasts. When moisture and desired temperatures are present, these breakdown bacteria may proliferate quickly.
An exponential rise in decomposition rates is caused by rising temperature under ideal moisture conditions.
Warm and moist places facilitate growth of detritivores like bacteria and fungus which are saprophytic and degrade the organic matter and decay the food stored in such places. Detritivores favour warm and moist conditions over cool and dry conditions for their growth.
Decomposition is the process of decay and degradation or breakdown of organic matter by bacteria and fungi into smaller substances.
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1: which of the following best defines homeostasis.
A: The maintenance of an organism's internal environment within certain limits.
B: The Ability of an organism to find a mate
C: The Ability of an organism go find its own food.
D: The maintenance of an organism's external environment within broad limits.
2: Which statement best represents how structure relates to function.
A: Great White sharks have sharp serrated teeth for tearing into their prey
B: A horses and is often black.
C: Many tropical birds can be taught to speak. some insects live longer than others.
1. The maintenance of an organism's internal environment within certain limits.
2. Great White sharks have sharp serrated teeth for tearing into their prey.
A state of balance between all body systems is necessary for the body to survive and function properly. Homeostasis is the ability or tendency of an organism to maintain internal stability to compensate for environmental changes. The characteristic of life that best describes homeostatic processes is the adaptation of an organism to its environment.
Structure and function refer to the location and role of various tissues, organs, and organ systems that work together. Structure determines function, and when structure changes, function changes. A change in the form leads to a change in function. Form and function are related, and form determines function.
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Identify the dependent and independent variables in part 2 and make a scatter plot. What conclusion would you draw about whether exposure to cane toads is having a selective effect on black snakes? Explain.
Exposure to cane toads appears to be selecting for black snakes that are less affected by the toxin.
What is a toxin in the body?Animals and plants can produce compounds called toxins that are dangerous (toxic) to humans. Some medications that are beneficial in small quantities but deadly in big doses may also be considered toxins. The majority of poisons that harm people are produced by microorganisms like bacteria.
What kinds of toxins are they?Bacterial toxins.Bacillus anthracis produces the fatal anthrax toxin.One of the most dangerous substances known as botulinum toxin is produced by the bacterium Clostridium botulinum.The Bordetella pertussis bacteria, which causes whooping cough, produces the pertussis toxin.To know more about Toxin visit:
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Female spotted sandpipers aggressively court males and, after mating, leave the clutch of young for the male to incubate. This sequence may be repeated several times with different males until no available males remain, forcing the female to incubate her last clutch. Which of the following terms best describes this behavior? a. polygyny b. polyandry c. promiscuity d. certainty of paternity
The correct option is (b) Polyandry
A single female engaging in sexual activity with two men is referred to as polyandry.
To improve their chances of finding mates, organisms have evolved a variety of noticeable morphological and behavioral features. Animals have adapted for sexual selection in a variety of ways, including coloration, calling, size increase, nesting, pheromones, and many other traits.Polyandry is a tactic employed by females to broaden the diversity of the colony. In the described situation, female spotted sandpipers mate with several males on multiple occasions.Therefore, the term "polyandry" best characterizes how female spotted sandpipers behave.Learn more about the Polyandry with the help of the given link:
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There are two classifications of cells. The simpler kind of cell is a[n]:
A. Eukaryotic cell
B. Plant cell
C. Prokaryotic Cell
D. Animal cell
Answer:
c. Prokaryotic cells
Explanation:
Searched it up.
What are indicator species? Why do indicator species play an important role for scientist’s?
Answer:
Indicator species is an organism that reflects an environment's condition.
The reason indicator species play an important role for scientists is because they can signal a change, which will help indicate a problem in the ecosystem.
Explanation:
For example, monarch butterflies are an indicator that an environment is healthy, there reaction is extremely quick when there's a sudden change in the environment.