What feature of a phospholipid's anatomy, when incorporated into the lipid bilayer of a cell's plasma membrane, prevent ions from freely diffusing into or out of a cell?
Answers
Anatomically, phospholipids are amphipathic molecules. This feature when incorporated into the lipid bilayer of a cell's plasma membrane prevents ions from freely diffusing into or out of a cell.
An amphipathic molecule contains both a hydrophilic (water-loving) as well as a hydrophobic (water-hating) region. A single phospholipid molecule contains a phosphate group on one end which is called the “head,” and two side-by-side chains of fatty acids that form the lipid “tails”.
Phospholipids are able to form cell membranes due to the fact that the phosphate group head is hydrophilic while the fatty acid tails are hydrophobic.
The lipid bilayer thus, acts as a barrier to the passage of molecules and ions into and out of the cell.
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Related Questions
The specialized form of milk produced by the mammary glands immediately after birth is?
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The graph demonstrates the quantitative variation for skin pigmentation.
A bar graph has skin pigmentation color on the horizontal axis and Proportion of population on the vertical axis. From lightest to darkest skin colors, the proportions are: 1/64, 6/64, 15/64, 20/64, 15/64, 6/64, 1/64.
Which conclusion is supported by the graph?
More than half of the population has the central skin pigmentation.
The lightest and the darkest skin pigmentations are equally common in the population.
The central skin pigmentation makes up more of the population than the rest of the skin pigmentation groups combined.
Fewer people have skin pigmentation lighter than the central peak than people who have pigmentation darker than the central peak.
Answers
The graph demonstrates the quantitative variation for skin pigmentation and concludes that the lightest and the darkest skin pigmentations are equally common in the population.
Why are the lightest and darkest skin pigmentations equal ?Human skin can be any shade of brown, from the deepest to the palest. Variation in pigmentation, which is brought on by genetics (inherited from one's biological parents and/or specific gene alleles), exposure to the sun, natural and sexual selection, or any combination of these, is what gives people their different skin tones. Natural or sexual selection, social norms, varying environments, and laws governing the biochemical consequences of ultraviolet radiation penetrating the skin all contributed to population changes over time.Here, the ratios of lightest to darkest pigmentation is gives as 1/64 + 6/64 + 15/64 + 20/64 + 15/64 + 6/64 + 1/64 Therefore, we get 64/64 so hereby we can conclude that the lightest and the darkest skin pigmentations are equally common in the population.What is skin pigmentation?Your skin's color is referred to as skin pigmentation. It is determined by the quantity and kind of melanin, a pigment produced by specialized skin cells called melanocytes. Pigment disorders like hyperpigmentation (dark spots), hypopigmentation (light spots), and depigmentation can be brought on by changes in melanin production.Can learn more about skin pigmentation from https://brainly.com/question/23723742
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Section 1: ENERGY
Discuss how we obtain and use energy in this section of your project. You should include how we use natural resources to create energy and at least two different types of alternate energy sources.
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Which is not a form of waste removal from the body?
A Crying
B Sweating
C Urinating
D Expelling gas
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Answer:
I know that Excretion is one way to remove waste from the body, but since it's not a choice, I would say C. Urinating.
Explanation:
Not 100% sure since B. and D. can also be correct.
Crying is not a form of waste removal from the body. Therefore, option (A) is correct.
It is an emotional response characterized by the shedding of tears, which are produced by the lacrimal glands. Crying is associated with various emotions, such as sadness, happiness, or frustration, and serves as a means of emotional expression and communication.
On the other hand, the other options listed are forms of waste removal from the body:
B Sweating: Sweat is produced by sweat glands and contains waste products such as urea, salts, and toxins. Sweating helps regulate body temperature and eliminate waste through the skin.
C Urinating: Urine is a waste product produced by the kidneys as they filter the blood. It contains urea, excess water, and other waste substances that the body needs to eliminate.
D Expelling gas: Gas, particularly in the form of flatulence (passing gas), can be a waste product produced during the digestion process. It involves the release of gases like methane, carbon dioxide, and hydrogen from the digestive system.
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Integumentary: skin: color ___________ turgor ___________ temp ____________ moisture _____________
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Integumentary: Temperature Turgor 2. (firmness), color; moisture content; skin integrity, including open sores and rashes
Integument inspection Use your hand to palpate the skin to measure the temperature. Stretching skin usually causes it to swiftly return to its previous shape. Check the color of surrounding skin areas. Redness may be a sign of various skin issueRash, cellulitis, a pressure ulcer, and an infection erythema that is blanchable versus non-blanchablePaper-thin skin; purple or bruise-like skin; dark or reddish areasSkin injury from excessive moisture or verosis are also possible (maceration).Etiology may include: - Incontinence; - Urine; - Stool; - Wound exudateSweating, including in those with a fever - In between skin folds (particularly in people with obesity)A leaky ostomy or fistulaSkin need to be undamaged. Determine the cause of the skin issue if the skin is not intact.learn more about Integumentary here: https://brainly.com/question/2801375
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Answer: Integumentary: skin ; color tan or brown turgor temperature, moisture content including allergic symptoms.
Explanation:
What is Integumentary?
Integumentary system is for the protection of our body and regulating heat.
Skin, nails, hairs are the example of Integumentary system.
The Integument cell Melanocytes has the main role in skin color and create tan or brown or blackish shade.Normally the temperature of the skin is 32.778 degree C but it helps to maintain the temperature through a strong connection with the sympathetic nervous system.Skin also maintains the moisture in cellular level, the Stratum Corneum controls the trans-epidermal water loss and the oil gland in dermal level, secrets oil to prevent extra water soaking.Disorders : Rashes, Acne, Rough skin, Peeling skin, Sunburn, Infection, Skin Cancer etc.Learn more about the skin integumentary here : https://brainly.com/question/28162308
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Allen's and bergmann's rules are perfect examples of natural selection working to bring about anatomical adaptations to different environments. these include:______.
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Allen's and bergmann's rules are perfect examples of natural selection which include the limb and trunk proportions of Neandertals.
According to Bergmann's rule, creatures at higher latitudes should be larger and thicker than those closer to the equator to better preserve heat, and according to Allen's rule, those at higher latitudes will have limbs that are shorter and thicker.
Latitudinal size clines can also be explained by seasonality and plant productivity. With endotherms, the rules typically apply, although in insects, various species within the same genus can react to latitude in unexpected ways.
Therefore, Allen's and bergmann's rules are perfect examples of natural selection which include the limb and trunk proportions of Neandertals.
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Tsar Nicholas II and Tsarina Alexandra were the Romanov rulers of Russia when the Bolshevik revolution took place in 1917. During this revolution, Tsar Nicholas II was overthrown, and the majority of his family members were killed. The remains of two of the Tsar and Tsarina’s children, Alexei and Anastasia, were never found. Suppose two people came forward who claim to be the missing Romanovs.
Which technology could only be used to identify Alexei?
DNA technology
STR analysis
mtDNA analysis
Y-chromosome analysis
Answers
The technology that could be used to identify Alexei DNA technology or Y-chromosome analysis.
How is the DNA test done to determine paternity?The paternity test is carried out through DNA, and aims to verify the degree of kinship between the person and his supposed father. This test can be done during pregnancy or after the baby is born by analyzing the blood, saliva or hairs of the mother, child and the alleged father.
What is Y chromosome analysis?The Y Chromosome test is mostly used to determine if there is a paternal relationship between two males. It is an extremely accurate and conclusive test and can be used in different situations. Any two males who are connected by a direct line can have this test done in order to determine relationship.
With this information, we can conclude that Genetic testing is a type of medical test that identifies changes in genes, chromosomes, or proteins.
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What is criminal homicide, and what are the key issues involved in in explaining patterns of homicide?
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Murder and Negligent Manslaughter are both forms of criminal homicide. The intentional (non-negligent) death of one person by another.
Any death brought on by wounds sustained in a brawl, disagreement, dispute, assault, or commission of a crime is typically categorized as murder and negligent manslaughter is criminal homicide.Socialization theories, symbolic interactionism, social structural theories, control theory, and social ecology theory are a few examples of criminal theories. Historically, one of the most well-known and prominent explanations for why people commit homicide and act violently has been the socialization theory of homicide and aggression.the following are the key issues involved in in explaining patterns of homicide:-thesis on the subculture of violence
-the victim-offender dynamic
hypothesis of exposure reduction
Disinhibition that is selective
using weapons
-sibling infractions
-drug and alcohol abuse
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(03.02 MC)
Is this a scientific model? Use complete sentences to explain why or why not.
A graphic organizer showing the water cycle
the picture is the water cycle
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The picture is a scientific model which is used to explain the concept of the water cycle by means of pictures and descriptions.
What is a scientific model?
A scientific model is a representation which may be in form of pictures, illustrations, objects, or ideas which are used to explain a particular concept by scientists.
Scientific models are usually employed to explain either difficult to understand concepts or scarcely observable phenomena in order to enrich the knowledge and comprehension of others.
The given illustration is an example of a scientific model. It is used to explain the concept of the water cycle. By means of pictures and descriptions, the various processes of the water cycle can be fully comprehended.
Also, by means of a cyclical illustration, the model helps to explain that the water cycle is a continuous repetitive process.
In conclusion, scientific models may be in form of pictures, illustrations or objects.
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The process by which a white blood cell or an amoeba engulfs bacteria is called pinocytosis.
a. true
b. false
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Which immunity type becomes active as a result of infection by a specific microorganism?
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Naturally acquired active immunity is the type of immunity that becomes active as a result of infection by a specific microorganism.
What is naturally acquired active immunity?Naturally acquired active immunity is a class of immunity derived from the previous contact with pathogenic microorganisms such as bacteria and viral entities.
This immunity (naturally acquired active immunity) generates specific antibodies that bind to antigens present in the pathogenic microorganisms and thus trigger immune responses.
In conclusion, naturally acquired active immunity is the type of immunity that becomes active as a result of infection by a specific microorganism.
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True or false: the issues submitted to arbitration in any state cannot include questions of law. group of answer choices true false
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The issues submitted to arbitration in any state cannot include questions of law is therefore regarded as a false statement in this type of context given in the question
What is Arbitration?This is referred to an alternative way in which dispute or conflict is usually resolved. This type of conflict resolution takes place outside the judicial court and involves two or more persons to tackle it.
The issues submitted to it in any state can include questions of law and its different applications in scenarios. This helps to ensure impartial judgement is delivered by the individuals involved after clearer understanding of the law after interpretations.
This is therefore the reason why false was chosen as the most appropriate choice.
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If a person uses up his or her reserve supply of glycogen and still does not eat, sugar comes from the?
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If a person uses up his or her reserve supply of glycogen and still does not eat, sugar comes from the muscle.
Although only liver glycogen directly contributes to the release of glucose into circulation, maintaining a healthy blood glucose concentration is one of the glycogen's key functions. Since skeletal muscles lack glucose 6-phosphatase, they are unable to release glucose, and muscle glycogen primarily serves as a local energy source for activity rather than a source of fuel to keep blood glucose levels stable while fasting.
In fact, the breakdown of muscle glycogen into lactate allows for its delivery to the liver, where it participates in the maintenance of euglycemia through the process of gluconeogenesis (Cori cycle).
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When reiko touched her newborn's lips, he produced an automatic response called the _____ reflex
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When reiko touched her newborn's lips, he produced an automatic response called the sucking reflex.
What is sucking reflex?These reflexes are uncontrollable motions that might occur on their own or in reaction to other actions. For instance, the sucking reaction occurs when a baby's mouth roof is touched. When this area is stimulated, the baby will start sucking, which aids in nursing or bottle feeding.One of the most crucial reactions your newborn has is undoubtedly the reflex to sucking. It goes hand in hand with the rooting reflex, which is when a baby looks for a food source. The sucking reflex enables him to suck and swallow the milk when he discovers it.The infant will begin sucking when the roof of the mouth is touched. Beginning at the 32nd week of pregnancy, this response takes around 36 weeks to fully develop. Because of this, premature babies may have a poor or undeveloped sucking ability.Learn more about sucking reflex here:
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The concentration of the pesticide ddt is likely highest in which organism? group of answer choices a mosquito larva algae a seagull a minnow plankton
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Seagull is likely to have the highest concentration of the pesticide DDT.
The amount of DDT is expressed in parts per million. In a food chain, the amount of toxic buildup increases along with the trophic level. In the tissues and fat of an organism, toxins accumulate. Aquatic animals are extremely harmful to DDT. DDT has an impact on a number of aquatic animal systems, including the heart and brain. Fish are extremely harmful to DDT.DDT is difficult for fish to detect in water. When an animal eats food that contains DDT residue, the DDT builds up in the animal's tissue through a process known as bioaccumulation. The biomagnification mechanism causes the concentration of DDT in an animal's body to increase the higher up the food chain the animal is. Here the seagull is the highest in the food chain and thus will be most affected by the DDT concentration.
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Dee miller has megaloblastic anemia, a blood disorder. Which specialist would dee seek for treatment of this condition?
Answers
The specialist that needs a person who suffers from megaloblastic anemia (a blood disorder) is a hematologist.
What is megaloblastic anemia?Megaloblastic anemia is a rare condition associated with problems in Vitamin B12, which is essential in order to transport oxygen in the red blood cells.
Megaloblastic anemia is due to problems with the production of stem cells in the bone marrow, which is involved with malformations in red blood cells.
In conclusion, the specialist that needs a person who suffers from megaloblastic anemia (a blood disorder) is a hematologist.
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When an individual is able to discern tat a given stimulus is not the conditioned stimulus and therefore does not perform the conditioned response this is called_________?
Answers
A Final statement or concluding statement
When an individual is able to discern tat a given stimulus is not the conditioned stimulus and therefore does not perform the conditioned response this is called Discrimination.
Give Examples of Stimulus Discrimination:Researchers coupled the taste of meat with the sight of a circle in one well-known experiment on classical conditioning, and dogs learnt to salivate in reaction to the presentation of a circle.
The dogs, however, salivated when they observed an ellipse or an oval form, according to the researchers.
As the dogs encountered more and more trials in which they did not taste meat when they saw the ellipse, they gradually learned to distinguish between the two identical stimuli.
They would salivate when they saw a circle, but not when they saw an ellipse.
Marketers employ stimulus discrimination in consumer behavior to help customers distinguish their items as unique from similar ones.
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What was the name of a wealthy Saudi who quickly rose to leadership
within the mujahideen?
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What problem might the ceo expect if the company switches to a modular structure?
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Making decisions at a decentralized level could undermine economies of scale and decrease business efficiency.
Making decisions at a decentralized level could undermine economies of scale and decrease business efficiency. Organizations that succeed integrate constant horizontal communication and issue resolution into their organizational culture. With centralization, an organization, or at least its top levels, can regulate the actions of lower-level workers to ensure that they are in line with its objectives. Top managers can establish a comprehensive perspective of operations and implement strict financial controls thanks to centralization. In a highly decentralized company, decision-making power is delegated to lower-level employees, who thus have more responsibility and authority to make and carry out choices.learn more about decentralized here: https://brainly.com/question/27661901
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The rabies virus is 12 kb in length. Based on the coating ratio of nucleoprotein (n), what would be the total number of nucleoprotein (n) molecules enclosed in a single virion?
Answers
Rabies virus nucleoprotein encapsidates the genomic and antigenomic RNA of RV to form the viral ribonucleoprotein complesx. Rabies virus is nonsegmented negative strand RNA virus within the Rhabdoviridae family.
It is zoonotic , aftal and progressive neurological infection caused by rabies virus of genus lyssavirus and family rhabdoviridae.Its genome is 12 kb in length and encodes 5 monocistronic mRNAs encoding the nucleocapsid protein, matrix, phosphoprotein, the trans-membrane, glycoprotein and viral RNA depent RNA polymerase.
Rabies virus vaccine vector tolerate large , multiple foreign genes , upt to 6.5 kb and live rabies virus vector with very low pathogenic potential can be constructed. It contains foreign glycoproteins such as hepatitis E2 or HIV .
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Administration of testosterone should lead to male mating behavior in an animal only if...
Choices:
The requisite sexually dimorphic nuclei are sufficiently masculinized
There are high levels of estrogen in the brain
There are low levels of estrogen in the brain
The requisite sexually dimorphic nuclei are sufficiently defeminized
Answers
Administration of testosterone should lead to male mating behavior in an animal only if The requisite sexually dimorphic nuclei are sufficiently masculinized.
The main sex hormone and anabolic steroid in guys is testosterone. In humans, testosterone is essential for the growth of the testes and prostate, as well as for the promotion of secondary sexual traits including increased bone and muscle mass and the development of body hair. Through territorial aggression, wooing rituals, and mate-guarding behavior, high testosterone levels have been found to improve mating effort.
The preoptic area of the hypothalamus, where the sexually dimorphic nucleus -POA is situated, regulates male sexual behavior. Snake, reptile, avian, rodent, ungulate, and primate male-typical copulatory activity is reduced by large lesions in the preoptic region.
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The interpretation that genetics influences intelligence to such an extent that one's iq levels are determined at conception is held erroneous because?
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The interpretation that genetics influences intelligence to such an extent that one's iq levels are determined at conception is held erroneous because interaction of genes with environmental forces can shape gene expression.
People are intelligent to some extent from birth. It is inactive until it is nurtured and studied to development. Nature endows us with intelligence.The chemistry that encodes genes in brain cells can change, either temporarily or permanently, depending on whether positive influences, such as exposure to rich learning opportunities, or negative influences, such as malnutrition or environmental contaminants, have had an impact. The chemistry that encodes genes in brain cells can change, either temporarily or permanently, depending on whether positive influences, such as exposure to rich learning opportunities, or negative influences, such as malnutrition or environmental contaminants, have had an impact. A growing corpus of research suggests that genetic and environmental variations interact dynamically to create individual variances in behavior and health.learn more about genetics and intelligence here: https://brainly.com/question/13223678
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Cohesin is cleaved by the enzyme ___________, which is held in an inactive state by ___________ until it is degraded by the apc/c complex
Answers
The enzyme separase, which is kept dormant by securin until the APC/C complex degrades it, cleaves cohesin.
Discussion about the enzymes:
At the metaphase-to-anaphase shift, the cysteine protease separase cleaves the Scc1 component of cohesin, signaling the start of chromosome segregation. Prior to metaphase, securin, a firmly bound protein, inhibits separase by blocking the separase enzymatic activity with a pseudosubstrate motif. Therefore, we create a technique for creating cloned, securin-free human separase in order to study the affinity and specificity, and control of separase. We find that the Scc1 substrate has an LPE motif that is different from the catalytic domain and necessary for quick and precise substrate breakdown that uses this enzyme. Researchers show that the retained LPE motif found in securin prevents the separase from binding to the Scc1 LPE motif.Learn more about separase here:
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Removal of waste and addition of fresh nutrients will most help increase which part of a growth curve?
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Removal of waste and addition of fresh nutrients will most help increase stationary phase of a growth curve.
what is bacterial growth curve?It is a graphical representation of the number of live cells in population of bacteria over a period of time.
In lag Phase growth curve, no cell division has been observed instead cellular activity are seen.
In exponential phase the cells undergo division by binary fission and
In stationary Phase the population growth experienced to decline due to depletion in nutrients availability and accumulation of waste products.
In death Phase, increase in waste products concentration decline in cells.
Thus, stationary phase is the correct answer.
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Photosynthesis: releases oxygen into the atmosphere. was prevalent during the first years of the earth's atmosphere. is carried out primarily by bacteria. releases carbon dioxide into the atmosphere.
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this is true have a good day
Soil is BIOLOGICALLY weathered with the help of which of these?
A. temperature changes
B. water and wind
C. tree roots, lichens, and other living organisms
Answers
Answer:
C
Explanation:
The key word here is "biologically", thus involving living things.
Temperature changes and water/wind are not living organisms that impact the weathering of soil. However, tree roots and lichens are living and break the soil down for nutrients.
Which clinical characteristic is associated with type 2 diabetes (previously referred to as non-insulin-dependent diabetes mellitus)?
Answers
Blood glucose can be controlled through diet and exercise is the clinical characteristic associated with type 2 diabetes (previously referred to as non-insulin-dependent diabetes mellitus).
A variety of dysfunctions associated with type 2 diabetes mellitus include hyperglycemia and are brought on by a combination of insulin resistance, insufficient insulin secretion, and excessive or incorrect glucagon secretion. The pathogenic pathways that lead to the development of diabetes are numerous.
Diabetes' impairments in protein, lipid, and carbohydrate metabolism are caused by inadequate insulin action on target tissues. Insulin secretion and action deficiencies sometimes occur in the same patient, and it is frequently difficult to determine which aberration, if either alone, is the main contributor to the hyperglycemia.
Therefore,Blood glucose can be controlled through diet and exercise is the clinical characteristic associated with type 2 diabetes (previously referred to as non-insulin-dependent diabetes mellitus).
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What type of spider is this, i just got bit by it
Answers
Answer:
It is not actually a spider it is a tick known as the American dog tick or the wood tick.
Explanation:
I hope this helps.
The _______ of a freshwater ecosystem _______ as you move further away from a point-source sewage spill.
Answers
The BOD (Biological Oxygen Demand) of a freshwater ecosystem decreases as you move further away from a point-source sewage spill.
Pollution originating from a single, identifiable source, such as a discharge pipe from a factory or sewage plant, is called point-source pollution. The term "biological oxygen demand" refers to the quantity of oxygen needed to allow aerobic bacteria to decompose waste organic matter in water.
The need for oxygen decreases as you travel away from the sewage spill and then increases. The need for oxygen decreases as there is more raw sewage present. Fish cannot survive in water with dissolved oxygen levels below 4 gm/liter, and the level will continue to drop.
Therefore, the BOD (Biological Oxygen Demand) of a freshwater ecosystem decreases as you move further away from a point-source sewage spill.
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The rounded superior portion of the uterus that lies between the uterine tubes is called the?
Answers
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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