If a cell is placed in an isotonic medium, there will be no net movement of water. True or false?.
It is true.
What is isotonic medium?A solution that has the same amount of salt as cells and blood. In hospitalized patients, isotonic solutions are routinely utilized as intravenous fluids. When a cell is immersed in an isotonic solution, there is no net movement of water into or out of the cell, and the volume of the cell remains constant. Isotonic solutions include 0.9% normal saline and lactated ringers. A hypertonic solution is one that has a greater solute concentration than the solution across the semi-permeable barrier.The isotonic solution allows the cells to move water and nutrients in and out of the cells. This is necessary for the blood cells to perform their function of supplying oxygen and other nutrients to other parts of the body.To learn more about isotonic solutions from the given link
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Which part of the body is represented by the largest area of the primary motor cortex?
Arm and hand motor area is the largest, and occupies the part of precentral gyrus represented by the largest area of the primary motor cortex .
The primary motor cortex is located in the precentral gyrus the premotor area is more rostral. The pyramidal cells of cortical layer V (also called Betz cells) are the upper motor neurons of the primary motor cortex.
The primary motor cortex, or M1, is one of the principal brain areas involved in motor function. M1 is located in the frontal lobe of the brain, along a bump called the precentral gyrus .
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What is one benefit if using SI units
ANSWER: the comparison of data all over the world can be done quickly
Infections with legionella pneumophila are usually transmitted via aerosols from contaminated air conditioning systems, showers, and humidifiers. group of answer choices true false
It is absolutely true that infections with legionella pneumophila are usually transmitted via aerosols from contaminated air conditioning systems, showers, and humidifiers.
What are infectious organisms?These are organisms which causes diseases to plants and animals.
Infectious organisms are also called pathogens or pathogenic organisms
Some groups of infectious organisms are as follows:
Bacteria: A single celled organisms with cell walls but no nucleus or organelles.Fungi: An eukaryotic organism typically having chitin cell walls but no chlorophyll or plastids. Fungi may be unicellular or multicellular.Virus: A submicroscopic, non-cellular structure consisting of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and often causes disease in the host organism.So therefore, it is absolutely true that infections with legionella pneumophila are usually transmitted via aerosols from contaminated air conditioning systems, showers, and humidifiers.
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In primary succession, do biotic or abiot elements arrive first? use examples when explaning your response
Biotic components arrive first in primary succession.
What is ecological succession?Ecological succession is the gradual change in the composition of an ecosystem over a particular time.
Ecological succession can either be;
Primary successionSecondary successionPrimary succession occurs when newly formed rock is preoccupied by living organisms called pioneers for the first time.
On the other hand, secondary succession occurs when an area that was previously occupied by living organisms is disturbed and then reoccupied after the disturbance.
This suggests that the first component of an ecosystem to occupy the substrate during primary succession is biotic components like lichen, grasses etc.
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Coniferous forests evolved due to earth’s continents assuming their modern configuration. please select the best answer from the choices provided t f
True, Coniferous forests evolved due to earth’s continents assuming their modern configuration.
What are Conifers?
Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta, also known as Coniferophyta or Coniferae.The great majority are trees, though a few are shrubs. Examples include cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews.The evolution of the Coniferous forests:
The earliest conifers appear in the fossil record during the Late Carboniferous (Pennsylvanian), over 300 million years ago.The most primitive conifers belong to the paraphyletic assemblage of "Wallachian conifers", which were small trees, and probably originated in dry upland habitats. The range of conifers expanded during the Early Permian (Cisuralian) to lowlands due to increasing aridity. Wallachian conifers were gradually replaced by more advanced voltzialean or "transition" conifers. Conifers were largely unaffected by the Permian–Triassic extinction event and were dominant land plants of the Mesozoic era. Modern groups of conifers emerged from the Voltziales during the Late Permian through Jurassic. Conifers underwent a major decline in the Late Cretaceous corresponding to the explosive adaptive radiation of flowering plants.To learn more about Conifers: https://brainly.com/question/831270
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short term effect if a wild beast migration occurred in savanna grassland
The short-term effect if a migration of wild animals took place in savanna grasslands is higher mortality of adults of migrating species than of resident species.
Why do animals migrate?Several species of birds, mammals, insects and fish migrate from one place to another in search of favorable reproductive and environmental conditions.
Why do animals migrate in Africa?Almost two million animals move across the Serengeti and Mara plains in search of food and water. Facing multiple dangers such as land predators and crocodiles the wildebeest complete an 800 km round trip during the migration.
With this information, we can conclude that The Great Wildebeest Migration is the largest animal migration in the world. Every year, more than 2 million animals (wildebeest, zebra, and gazelle) migrate in a clockwise direction across the ecosystems of the Serengeti (Tanzania) and the Masai Mara (Kenya).
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The pronunciation of the anatomic structure that conducts impulses to and from the brain and initiates reflex action to sensory information is:_________
The pronunciation of the anatomic structure that conducts impulses to and from the brain and initiates reflex action to sensory information is the spinal cord.
The spinal cord is a lengthy band of tissue that resembles a tube. It ties your brain and lowers it back together. Your spinal cord relays nerve messages back and forth from your brain to your body. You can experience feelings and move your body thanks to these nerve transmissions. The protection of the spinal cord, nerve roots, and many internal organs are the spine's three primary tasks. To keep your body upright, give it balance and structural support. Enable fluid movement. The spinal cord is surrounded by cerebrospinal fluid (CSF), which is additionally protected by three layers known as the meninges (dura, arachnoid, and pia mater). The spinal column, which consists of 33 bones known as vertebrae, houses the spinal cord.Learn more about the spinal cord here brainly.com/question/16014308
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The non-oxidative stage of the pentose phosphate pathway produces substances that are intermediates of?
The non-oxidative stage of the pentose phosphate pathway produces substances that are intermediates of glycolysis.
What is glycolysis?Glycolysis is the method of dividing glucose to produce energy. It generates two pyruvate particles, ATP, NADH, and water.
The process occurs in a cell's cytoplasm and therefore does not entail oxygen. It can be found in aerobic and anaerobic organisms.
Since it is utilized by nearly all organisms on Earth, it was most likely one of the first metabolic pathways to evolve.
The non-oxidative phase of the pentose phosphate pathway generates glycolysis adducts.
Thus, the answer is glycolysis.
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In the early embryo what signals must occur together in the splanchnic mesoderm for cardiogenic mesoderm to be specified?
In the early embryo DKK, Crescent, Cerberus, FGF8, and BMP signals must occur together in the splanchnic mesoderm for cardiogenic mesoderm to be specified.
Through BMP and FGF signalling pathways, the underlying anterior endoderm specifies the cardiogenic mesoderm layer. The two cell groups are instructed by these signals to differentiate separately as they move anteriorly toward the gut tube.
The infolding of a surface layer known as the splanchnic (or ventral) mesoderm brings the two endocardial tubes together, where they merge. Recent research reveals that endogenous Wnt inhibitors such the Sfrp and DKK proteins are crucial in controlling the differentiation of cardiomyocytes.
Therefore, In the early embryo DKK, Crescent, Cerberus, FGF8, and BMP signals must occur together in the splanchnic mesoderm for cardiogenic mesoderm to be specified.
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Enteric bacteria most useful in the routine monitoring of microbial pollution are gram-negative rods called?
E-coli bacteria which most useful in the routine monitoring of microbial pollution are gram negative rods and this is common indicator organism of water contamination.
It is important to identify enteric bacteria which is one of the major causes of diarrhea disease is bacteria and that detection of pathogenic bacteria is a global key to the prevention and identification of food borne diseases and enteric infections like diarrhea.
The extent of water contamination can be measured using these indicator organisms. This fecal coli-form group has been used as the most common indicator of general wastewater contamination because they are abundant and easy to identify.
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the graph shows how the rate of photosynthesis of a plant varies with light intensity. interpret the graph and justify statement.
The graph shows that the rate of photosynthesis increases with increased light intensity, other conditions being constant.
Photosynthesis and light intensityFrom the graph, the rate of photosynthesis increases with an increase in light intensity.
At low light intensity, the photosynthesis rate increases with an increase in the concentration of carbon dioxide and level off at some point.
With medium light intensity, the rate of photosynthesis is about twice that of low light intensity under the same concentration of carbon dioxide. It also gradually levels off when the concentration of carbon dioxide reached a particular point.
The same trend applies to high light intensity. The rate of photosynthesis increased accordingly, much more than low and medium-intensity light.
Both light and carbon dioxide concentration can limit the rate of photosynthesis. When both factors are abundant, photosynthesis can be limited by other factors such as water, nutrient, etc.
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In the electron transport chain, protons are pumped from where to where in the mitochondria of eukaryotic cells?
In the electron transport chain, protons are pumped from the mitochondrial matrix to the intermembrane space, and oxygen is reduced to form water.
The energy derived from the transfer of electrons through the electron transport chain is used to pump protons, as a result, an electrochemical gradient is generated, consisting of a proton gradient and a membrane potential.
The energy created by the formation of this gradient is then harnessed to form ATP as the protons travel down their gradient into the matrix through the ATP synthase channel.
The electron transport and ATP production occur simultaneously and are tightly coupled.
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Which of these species would be most in danger of becoming extinct if one of their food sources became unavailable?
Answer:
Due to their being no options (possibly just an incomplete question), I will just give an answer. So for panda bears, if their food sources became unavailable, they would most likely be in danger of becoming extinct.
But one thing is, pandas do have the ability to survive with bamboo.
But since bamboo comprises 99 percent of their food, although they also consume other plants and even meat, I highly doubt they could (whose make the remaining 1 percent ).
Because the gene T1R1 mutated some 4 million years ago, causing them to lose the ability to taste umami, giant pandas have come to rely significantly on bamboo (which is what makes meat tasty for omnivores and carnivores). The availability of bamboo trunks at the time coincided with their purported food source becoming increasingly limited, thus pandas became used to them and began to rely significantly on them, as they do now.
Thank you,
Eddie
__medium distinguishes different types of microorganisms based on an observable change in the colonies or in the medium.
A differential medium is a type of media that distinguishes different types of microorganisms based on an observable change in the media.
What is a differential medium?A differential medium is any medium for bacterial growth that contains selective agents used to discriminate between different microorganisms present in such medium.
A differential medium can be, for example, a blood agar medium that has bovine blood cells which is selective to Streptococcus bacteria.
In conclusion, a differential medium is a type of media that distinguishes different types of microorganisms based on an observable change in the media.
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It is confusing that genes and proteins are given the same name, such as epas1. let’s sort them out with the basics. a gene is a section of what type of molecule?
It is confusing that genes and proteins are given the same name, such as epas1. A gene is a section of DNA or deoxyribonucleic acid.
A gene is the basic structural and functional unit of heredity. Genes contain instructions which directs the cells to synthesize molecules called proteins. Proteins perform various functions in the body required for maintenance of health of an individual.
The EPAS1 gene, also called as HIF2A , delivers instructions for the synthesis of a protein known as hypoxia-inducible factor 2-alpha (HIF-2α). This protein is a part or subunit of a larger protein complex called HIF, which plays a crucial role in the body's capacity to adjust to dynamic oxygen levels.
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What is the reason cyanobacteria and bacteria do not reproduce by mitosis?
a. they are not organisms.
b. they do not contain cells.
c. they only contain one chromosome.
d. they have more than one chromosome.
Cyanobacteria and bacteria do not reproduce by mitosis because they only contain one chromosome.
Why is mitosis not possible in cyanobacteria and bacteria?Mitosis involves the equational division of vegetative cells.
During mitosis, sister chromatids separate and migrate to the opposite poles with the same cytoplasm. The cytoplasm eventually divides by cytokinesis to produce two independent daughter cells that are not only genetically similar to each other, but also to their parent.
Cyanobacteria and bacteria have just a single chromosome in their genome. Thus, it is impossible for this chromosome to separate, migrate to the opposite poles. and produce 2 daughter cells.
Both organisms are living and reproduce by other means such as binary fission, conjugation, etc.
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In which zone would you expect to find the greatest abundance of marine organisms? middle intertidal zone supralittoral zone high littoral zone low intertidal zone
High littoral zone has greatest abundance of marine organisms.
What is High littoral zone?The intertidal zone, also known as the "littoral zone," refers to the seashore that is covered during high tide and exposed during low tide, revealing a unique biome that survives under such fluctuating conditions.
Where are most marine organisms found?The majority of ocean life can be found in coastal habitats on the continental shelf, despite the fact that this area accounts for only 7% of total ocean area. The majority of open ocean habitats are found in the deep ocean beyond the continental shelf. Species that live in the oceans and on the coasts can help to create new habitats.
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n a jungle habitat, there lives a species of snake, called Species A. The carrying capacity of the jungle allows 5000 of Species A. After their habitat was destroyed, a second species of snakes, Species B, arrives in the jungle. After a few years, the population of Species A has dropped to 0, and the population of Species B has become 5000. What can you determine from this data?
A. They occupy separate niches, but are still competing for some resources.
B. They occupy completely different niches and are not competing.
C. You cannot determine anything from this data.
D. They occupy the same niche and are competing fully for all resources.
Reset Selection
Based on the carrying capacity of the habitat and the changes that occurred in number of the two snake species, correct option is They occupy the same niche and are competing fully for all resources; option D
What is carrying capacity of a habitat?The carrying capacity of a habitat is the maximum number of species the available resources in that habitat can sustain.
The data given of the species of snakes, Species A and Species B, indicate that they are both present in the habitat after a change occurs in the habitat.
Since the population of Species A became zero after Species B was introduced in the habitat, they occupy the same niche and are competing fully for all resources.
In conclusion, the competition between the species of snakes is responsible for the decline in Species A.
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Which component of the electrocardiogram represents the duration of ventricular contraction?
QRS complex refers to the combination of the Q, R, and S waves, and indicates ventricular depolarization and contraction (ventricular systole).
Ventricular rate can be calculated by determining the time interval between QRS complexes. The duration of the QRS complex is normally 0.06 to 0.10 seconds. This relatively short duration indicates that ventricular depolarization normally occurs very rapidly.
P QRS and T waves in electrocardiogram signifies the P wave in an ECG complex indicates atrial depolarization. The QRS is responsible for ventricular depolarization and the T wave is ventricular repolarization.
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In a _____ mutation, the change occurs during the dna replication that precedes meiosis.
In a germline mutation, the change occurs during the dna replication that precedes meiosis.
A gene change in a body's reproductive cell (egg or sperm) that becomes integrated into the DNA of every cell in the body of the offspring. Germline mutations are passed on from parents to offspring. Germline mutations are the cause of many diseases like, cystic fibrosis and cancer (eg, breast and ovarian cancer, melanoma). Cystic fibrosis is a hereditary genetic disorder that results in a thick, sticky buildup of mucus in the lungs, pancreas and other organs.
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An increase in carbon dioxide in the atmosphere will MOST likely affect which type earth activity?
An increase in carbon dioxide in the atmosphere will most likely affect a type earth activity called cave formation.
How do cave form?The carbon dioxide (CO2) in the earth atmosphere is increasing as a result of the anthropogenic activities such as deforestation, burning of the fossil fuels.
Carbon dioxide is known to be a greenhouse gas that is released by living organisms as a waste product of cellular respiration.
The carbon dioxide in the atmosphere gets mixed with the rain water which seeps into the soil. This results in the accumulation of carbonates (CO3²-) in the soil as limestone.
The cave of limestone is formed by the groundwater because limestone is a soft material which get easily dissolves in the water.
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The rounded superior portion of the uterus that lies between the uterine tubes is called the?
The rounded top portion of the uterus that is situated in-between the uterine tubes is known as the fundus.
A brief explanation of the uterus:
The uterus is the most important hormonally sensitive organ of the female reproductive system in humans and most other animals. The upper region of the uterus, which is above where the fallopian tubes are, is referred to as the "fundus." The region between the corpus and the cervix is known as the isthmus, and it is narrow and situated near the intersection of the internal os of the cervix and the uterine artery.
What does uterine fundus actually mean?
a hollow sphere's area that is opposite or farthest from the organ's opening. Depending on the organ, the fundus might be located at either the top or bottom of a site. The fundus of a uterus, for instance, refers to the upper part of the uterus that lies opposite the cervix.
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When stomata are open and a plant is transpiring normally, how does water move from the soil into the root xylem? select all that apply.
When stomata are open and a plant is transpiring normally, movement of water from the soil into the root xylem is brought about by:-
Pressure generated by roots which pumps water upwards in the plant. Without any additional work done on the fluid by the plant.Evaporation from the leaves in the form of transpiration.In 1895, the Irish plant physiologists H. H. Dixon and J. Joly suggested that water is pulled up the plant by tension or negative pressure from above.
As water is continually being lost from the leaves through transpiration, Dixon and Joly concluded that the loss of water in the leaves exerts a pull on the water in the xylem ducts and draws more water into the leaf.
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Suppose you cup your hands to hold some water. This action would most likely involve?
Answer:
it involves the adduction of fingers
A researcher has sequenced a gene that is present in two alleles. She has a mixture of both alleles and clones them into e. Coli using plasmids that contain the lacz gene. She is interested in one particular allele that is indicated in a disease. Using media containing x-gal, how can she select those colonies that have her allele of interest?.
She will need to sequence the plasmids of the white colonies before she can determine which allele it carries.
What are plasmids?A plasmid is a single-celled, circular, double-stranded DNA molecule that differs from chromosomal DNA.Plasmids are naturally prevalent in bacterial and eukaryotic cells. Plasmid genes usually provide bacteria with genetic benefits such as antibiotic resistance.RNA plasmids are uncommon, and the vast majority of them are unknown.Examples include plants, fungi, and even animals. Some strains of the yeast Saccharomyces cerevisiae contain linear RNA plasmids.Similar RNA plasmids have been identified in the mitochondria of different varieties of maize plants.Read more about plasmids here:
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Blood typing is based on the presence of proteins known as __________ on the outer surface of the red blood cell plasma membrane
Blood typing is based on the presence of proteins known as antigens/antibodies on the outer surface of the red blood cell plasma membrane.
You can determine what type of blood you have by blood typing. Blood typing ensures that you can safely give blood and receive blood transfusions. Additionally, it checks to see if the Rh factor, which is found on the surface of red blood cells, is present.The four primary blood types are:
Type A Type B Type ABType OBlood group A – has A antigens on the red blood cells with anti-B antibodies in the plasma
Blood group B – has B antigens with anti-A antibodies in the plasma
Blood group O – has no antigens, but both anti-A and anti-B antibodies in the plasma
Blood group AB – has both A and B antigens, but no antibodies
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Which structure(s) coordinates daily cycles of activity that are linked to the day-night cycle??
A structure that coordinates daily cycles of activity that are linked to the day-night cycle is suprachiasmatic nucleus (SCN).
The anterior region of the hypothalamus has a bilateral structure called the suprachiasmatic nucleus (SCN). It controls the majority of the body's circadian rhythms and serves as the circadian timing system's main pacemaker.
The SCN gets suggestions from Intrinsically photosensitive retinal ganglion cells (ipRGCs) project through the retino-thalamic tract to neurons in the SCN via glutamatergic synapses, providing the photic input. The circadian clock is synchronised as a result.
Therefore, A structure that coordinates daily cycles of activity that are linked to the day-night cycle is suprachiasmatic nucleus (SCN).
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The average cardiac output at rest is: ____.
a. 1000 ml/min
b. 2500 ml/min
c. 5000 ml/min
d. 10,000 ml/min
The correct option is (C) 5000 ml/min.
The average cardiac output at rest is 5000 ml/min.
What is cardiac output?The cardiac output is the volume of blood the heart pumps out per minute.
The cardiac output is measured by the product of Heart rate (HR) and stroke volume (SV).
It is measured in liters /min.
The number of times the heart beats per min is termed heart rate.
The volume of blood pumped out from the left ventricle of the heart at each systolic cardiac contraction is termed heart rate.
The normal cardiac output is 5L/min (72 beats per min, 70ml stroke volume).
This may vary from male to female by only 10% – 20%.
Esophageal doppler, pulse contour analysis, pulmonary artery catheter etc. can be utilized to calculate cardiac output.
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The surgical removal of the membrane that lines the interior of a joint is known as a?
The surgical removal of the membrane that lines the interior of a joint is known as Joint Synovectomy.
The surgical removal of the synovial membrane, the tissue that lines the joint capsule, is known as a joint synovectomy.
The body's synovium surrounds the joints and creates synovial fluid to lubricate the joint and promote easy mobility.
The joint disease causes the synovium to inflame (synovitis) and overproduce synovial fluid, which contains an enzyme that can eat away at the cartilage on the joint surface, causing bone-on-bone on bone joint discomfort.
When you have a painful, disabling joint issue that does not improve with non-surgical treatments including rest, drugs (NSAIDs) or corticosteroid injections, and physical therapy, your surgeon will typically advise joint synovectomy.
Hence, the surgical removal of the membrane that lines the interior of a joint is known as Joint Synovectomy.
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