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Answers
Answer:
C
Explanation:
Related Questions
Question 4 1 pts Lactation normally does not occur during pregnancy because of inhibition from the high levels of estrogen and progesterone. True False Question 5 1 pts What hormone may play a role in reducing the size of the uterus following delivery? Progesterone Oxytocin
Answers
The answer for the Question 4 is False and for Question 5 is Oxytocin
Lactation normally does not occur during pregnancy because high levels of estrogen and progesterone inhibit lactation. It is only after childbirth when estrogen and progesterone levels drop that lactation is initiated, triggered by the hormone prolactin.
Oxytocin plays a role in reducing the size of the uterus following delivery. Oxytocin is a hormone released by the posterior pituitary gland in response to the stimulation of the nipples during breastfeeding. Oxytocin causes the smooth muscles in the uterine wall to contract, which helps to expel the placenta and reduce the size of the uterus. This process is known as involution, and it is necessary for the uterus to return to its pre-pregnancy size and shape. Progesterone, on the other hand, plays a role in maintaining the thick lining of the uterus during pregnancy, and its levels drop following delivery, which is also necessary for the uterus to return to its non-pregnant state.
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At what pH level does hydrion paper turn green
Answers
Answer:
In general, litmus paper is red below a pH of 4.5 and blue above a pH of 8.3. If the paper turns purple, this indicates the pH is near neutral.
Which method often results in colonies developing down throughout the agar and some colonies on the surface?a.streak plate b..spread plate c..pour plate d.All of the choices are correct. e.None of the choices are correct.
Answers
The method that often results in the development of colonies all over the agar and some colonies on the surface is: C) pour-plate method.
Option C) pour plate, is a method that involves diluting a bacterial sample in molten agar, which is poured into a Petri dish. As the agar solidifies, the bacteria become immobilized and are distributed throughout the agar matrix. Consequently, as the bacteria grow, they form colonies both on the surface and inside the agar.
In contrast, the streak plate and spread plate methods result primarily in the formation of colonies on the surface of the agar. The streak plate method involves the use of an inoculating loop to streak a bacterial sample across the surface of an agar plate, effectively diluting the bacteria and promoting the formation of isolated colonies.
The spread plate method involves adding a known volume of bacterial suspension to an agar plate and using a sterile spreader to evenly distribute the sample across the surface, which facilitates the growth of distinct colonies on the surface.
While each of these methods is useful for specific purposes, it is the pour-plate method that leads to colony development both within the agar and on the surface, making it the most appropriate answer to your question.
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Which curves on the graphs may represent the temperature and ph profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot springs at temperatures of 70°c or higher?.
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Temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot spring at temperatures of 70°C or higher are as follows: Enzymes are biologically significant organic molecules that speed up chemical reactions within living organisms.
They are usually proteins and are highly specific in their action, breaking down and forming molecules at a high rate. The activity of enzymes is influenced by environmental factors, including temperature and pH.The temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot spring at temperatures of 70°C or higher can be represented by a curve as shown below;Explanation:Image source: Chegg.comThere are four graphs in the image above. The X-axis represents temperature, and the Y-axis represents enzyme activity.
A. graph represents the profile of an enzyme from an organism that survives in a cool, neutral pH environment.B. graph represents the profile of an enzyme from an organism that survives in a hot, acidic environment.C. graph represents the profile of an enzyme from an organism that survives in a warm, neutral pH environment. D. graph represents the profile of an enzyme from an organism that survives in a hot, alkaline environment.The curve in graph D represents the temperature and pH profiles of an enzyme taken from a bacterium that lives in a mildly alkaline hot spring at temperatures of 70°C or higher.
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in september 2001, the american public was exposed to anthrax spores as a bioweapon delivered through the us postal system.
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In September 2001, the American public was exposed to anthrax spores as a bioweapon delivered through the US postal system.
In September 2001, a series of anthrax attacks occurred in the United States, where letters containing anthrax spores were mailed to various locations, including media outlets and government offices. These attacks resulted in several fatalities and caused widespread fear and panic.
Anthrax is a highly virulent bacterial disease caused by the spore-forming bacterium Bacillus anthracis. The spores of anthrax can be used as a bioweapon due to their ability to survive in harsh conditions and their potential to be disseminated through the air.
The spores were intentionally sent through the US postal system, resulting in the contamination of mail sorting facilities and the subsequent exposure of individuals who came into contact with the contaminated mail. This incident highlighted the vulnerability of postal systems to bioterrorism and led to increased security measures to prevent similar attacks in the future.
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all the alleles present in all individuals in a species are referred to as the _____ of that species.
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All the alleles present in all individuals in a species are referred to as the gene pool of that species.
In the field of population genetics, the gene pool is the total set of genes and their variations that exist within a population of a particular species. The gene pool includes both dominant and recessive alleles and all of the various genotypes that can be produced from them.Gene pool can vary from one population to another, and they can change over time within a population due to various factors such as natural selection, genetic drift, gene flow, mutation, and other factors.
The size and diversity of the gene pool are crucial to the survival and evolution of a species. A larger gene pool provides a greater potential for genetic variation and adaptability to changing environmental conditions. In contrast, a smaller gene pool may reduce the ability of a population to adapt to new challenges and increase the risk of genetic diseases and other issues. So therefore gene pool is all the alleles present in all individuals in a species of that species.
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Which of the following is closest to the size of a sperm? Highlight the correct choice:
Virus Bacteria Muscle cell Frog blood cell
Answers
Answer: frog blood cell
Explanation:
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Which of the following are common pronatalist pressures (select
all that apply)?
childhood mortality
need for labor
culture and religion
educated women
total fertility rate
Answers
The common pronatalist pressures include the need for labor, culture and religion, and total fertility rate.
Common pronatalist pressures refer to factors that encourage or promote higher birth rates within a society. Let's analyze each option:
In summary, the common pronatalist pressures among the options provided are the need for labor, culture and religion, and total fertility rate.
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one of the first pathophysiological responses to the decreased gfr in acute renal failure is: increased urination. reabsorption of bun. activation of the renin-angiotensin-aldosterone system. secretion of creatine.
Answers
One of the first pathophysiological responses to the decreased glomerular filtration rate (GFR) in acute renal failure is the activation of the renin-angiotensin-aldosterone system. GFR refers to the rate at which the kidneys filter blood. Renal failure is a condition characterized by the kidneys' inability to function properly, leading to a decrease in GFR and other symptoms.
Acute renal failure (ARF) occurs when the kidneys abruptly lose their ability to function properly. ARF is a medical emergency that requires urgent intervention. A decrease in GFR is one of the earliest signs of ARF. ARF is classified based on the cause of the condition, which can be pre-renal, intra-renal, or post-renal. Pre-renal ARF is caused by inadequate blood flow to the kidneys, intra-renal ARF is caused by damage to the kidney tissue, and post-renal ARF is caused by a blockage in the urinary tract.
In response to decreased GFR, the kidneys release renin, an enzyme that activates the renin-angiotensin-aldosterone system. This system plays a crucial role in regulating blood pressure and fluid balance. When activated, the renin-angiotensin-aldosterone system causes the kidneys to retain salt and water, which helps to maintain blood pressure and increase GFR. The system also causes the blood vessels to constrict, which further increases blood pressure.
The activation of the renin-angiotensin-aldosterone system is a physiological response that occurs in the early stages of ARF, before the onset of other symptoms.
In conclusion, the activation of the renin-angiotensin-aldosterone system is one of the first pathophysiological responses to the decreased GFR in acute renal failure.
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How is ocean and space exploration similar?
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The size of most prokaryotic cells is about _________ in diameter.
1-2µm
3-4µm
4-5µm
2-5µm
Answers
Answer:
option 1
Explanation:
The size of most prokaryotic cells is about in diameter.
1-2µm
The size of most prokaryotic cells is about 1-2µm in diameter. Therefore option A is correct.
Most prokaryotic cells are relatively small, typically ranging in diameter from 1 to 2 micrometers (µm). Prokaryotes are unicellular organisms without a true nucleus or membrane-bound organelles.
Their small size is advantageous as it allows for efficient nutrient uptake and waste elimination, facilitating rapid growth and replication.
Despite their small size, prokaryotic cells are highly diverse and can be found in various environments, including soil, water, and even within the human body.
Therefore option A is correct.
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which statement is false?human beings are bipedal and have paired extremities.the human skeleton consists of 306 bones.the body of every person is composed of the same materials commonly found in the earth.
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The statement that is false among the following three statements is "the body of every person is composed of the same materials commonly found in the earth."This is a false statement because the human body is composed of various elements that are not commonly found in the earth.
The majority of the elements in the human body are carbon, hydrogen, oxygen, nitrogen, calcium, and phosphorus. These are the six main elements that are found in the human body in large amounts. There are some minor elements present in the body in smaller amounts, which include iron, sodium, chlorine, potassium, and magnesium. There are a total of 26 elements that make up the human body. These elements are arranged in different proportions and combinations to form different types of molecules. Proteins, fats, carbohydrates, and nucleic acids are all made up of these elements.The other two statements are true. Human beings are bipedal and have paired extremities. The human skeleton consists of 206 bones, not 306. This is an important fact to remember. There are two types of skeletons that can be found in the animal kingdom: exoskeletons and endoskeletons. The human body has an endoskeleton, which means that the bones are located on the inside of the body, providing protection for the organs and support for the body. Therefore, "the body of every person is composed of the same materials commonly found in the earth." ; this statement is false because the human body is composed of various elements that are not commonly found in the earth.For more such questions on human body , click on:
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the place on the retina that contains neither rods nor cones is where the
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The place on the retina that contains neither rods nor cones is called the blind spot. The blind spot is located where the optic nerve leaves the eye and there are no photoreceptor cells to detect light.
However, we don't usually notice our blind spots because our brains fill in the missing information based on the surrounding visual information. This phenomenon is known as visual completion. Interestingly, the size and location of the blind spot can vary from person to person and can even change depending on the position of the eye.
To test your own blind spot, you can try the blind spot test where you cover one eye and stare at a small dot while slowly moving the paper closer or further away until the dot disappears. The point where the dot disappears is your blind spot.
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Jackson creates the model shown in the diagram. He forms a clay mountain at the bottom of a plastic container and adds water to the container. Jackson then places a lid on top of the container and a petri dish filled with ice cubes on top of the lid. Next, he places a lamp over the container and turns it on.
a. What observation would indicate to Jackson that water is being cycled within the model?
b. Explain why the observation is evidence that water is being cycled within the model.
Answers
a. Jackson would observe condensation on the lid of the container.
b. The observation of condensation on the lid of the container is evidence that water is being cycled within the model. When the lamp heats up the water in the container, the water evaporates and rises up to the cooler lid where it condenses and forms droplets. These droplets then fall back into the container, completing the cycle of evaporation, condensation, and precipitation. This process mimics the natural water cycle on Earth where water evaporates from oceans and other bodies of water, forms clouds, and then falls back to Earth as precipitation.
Which of the following carbohydrates is not a disaccharide ? A. maltose B. lactose C. sucrose D. galactose
Answers
The carbohydrate that is not a disaccharide is galactose. Due to the fact that galactose is a monosaccharide, it is a simple sugar that cannot be divided into more manageable sugar molecules. Since it has six carbon atoms, it is referred to as a hexose. Hence option D is correct.
Compared to glucose or fructose, galactose is a frequent sugar present in dairy products. On the other hand, the other options mentioned in your question, A. maltose, B. lactose, and C. sucrose, are all disaccharides.
Two molecules of glucose are joined to form the disaccharide known as maltose. It is a byproduct of the breakdown of starch and is frequently observed in grains that are germination.
One glucose and one galactose molecules combine to form the disaccharide known as lactose. In milk and dairy products, it is the main sugar present.
Glucose and fructose are the two molecules that make up the disaccharide known as sucrose. In plants, including sugarcane and sugar beetroots, it is the most prevalent kind of sugar.
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The carbohydrate that is not a disaccharide is galactose.
carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen atoms. They are one of the main sources of energy for living organisms. Carbohydrates can be classified into three main types: monosaccharides, disaccharides, and polysaccharides.
Monosaccharides are the simplest form of carbohydrates and cannot be broken down into smaller units. They consist of a single sugar unit. Examples of monosaccharides include glucose, fructose, and galactose.
Disaccharides, on the other hand, are formed when two monosaccharides are joined together through a glycosidic bond. Examples of disaccharides include sucrose, lactose, and maltose.
Now, let's analyze the given options:
A. Maltose: Maltose is a disaccharide composed of two glucose molecules.B. Lactose: Lactose is a disaccharide composed of one glucose molecule and one galactose molecule.C. Sucrose: Sucrose is a disaccharide composed of one glucose molecule and one fructose molecule.D. Galactose: Galactose is a monosaccharide and not a disaccharide.Therefore, the carbohydrate that is not a disaccharide is galactose.
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Xavier drew a diagram to compare the roles of oxygen and hydrogen in photosynthesis.
Which label belongs in the area marked X?
Enters plant as a part of the water
Combines with carbon dioxide
Is released into the air through stomata
Is stored in leaves for later use
Answers
Answer:
Is released into the air through stomata
Explanation:
Oxygen and hydrogen both exists as gaseous molecules in the atmosphere. However, one of them (oxygen) is a product of photosynthesis while the other (hydrogen) is one of the constituents of the molecule that starts the process of photosynthesis.
According to this question, the X used in the attached diagram is the role of oxygen in photosynthesis. Oxygen is released as a product of photosynthesis and goes out of the plant into the air via the STOMATA. Hence, the gas released into the air via stomata is OXYGEN.
Answer:
C. Is released into the air through stomata
Explanation:
:3
Can someone please help!!!! #3
Answers
Enzymes...
make things easier for your cells
make things harder for your cells
Answers
Answer:
make things easier for your cells.
Explanation:
enzymes speed up reactions in cells which help them out in the long run.
Lisa is working on a science project. Her task is to
answer the question: "Does fluoride (which is a
commercial hair product) prevent cavities?". Her
family is willing to volunteer for the experiment.
11. Describe how Lisa would perform this experiment. Identify the control group, and the independent variables in your description
Answers
Answer:
The fluoride is what helps you avoid cavities
Explanation:
water fluoridation as safe and effective in preventing tooth decay for both children and adults
4. how do histones interact non-specifically (in terms of sequence) to dna?
Answers
Histones interact non-specifically with DNA by wrapping the DNA around them, without any particular sequence preference. The interaction occurs through electrostatic attraction between the positively charged amino acids of histone proteins and the negatively charged phosphate groups of the DNA backbone.
Here's a step-by-step explanation:
Histone proteins have positively charged amino acids, such as lysine and arginine, which provide a strong electrostatic attraction to the negatively charged phosphate groups in the DNA backbone.This electrostatic attraction allows the DNA to wrap around the histone proteins without any sequence specificity, as the interaction is based on the chemical properties of the molecules rather than their specific sequence.The DNA wraps around histone proteins to form a structure called a nucleosome, which consists of approximately 147 base pairs of DNA wrapped around a histone octamer (eight histone proteins).Multiple nucleosomes further coil and compact to form higher-order chromatin structures, which help organize and package the DNA within the cell nucleus.In summary, histones interact non-specifically with DNA through electrostatic attraction, allowing the DNA to wrap around them without any sequence preference.
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Which organism is a primary consumer in the food web below?Chesapeake Bay Waterbird Food WebTertiaryConsumers:SecondaryConsumers:PrimaryConsumers:Producers:GullsandTermsOspreyWading BirdsLargePiscivorous FishSmall PlanktivorousFishZooplanktonBenthicInvertebratesSea DucksBivalvesBald EagleHerbivorousDucksPhytoplankton Submerged AquaticVegetationTundra SwanGeese andSwansVegetation
Answers
The primary consumer is the organism that eats the producer. It gets the at least 10% of the energy stored in a producer. It is above the producer at the trophic level. It may be a herbivore or an omnivore.
ANSWER: Zooplankton, Herbivorous ducks, small planktivorous fish
Contrast endocytosis and exocytosis.
Answers
Answer:
Endocytosis is the transport into the cell and exocytosis is the transport out of the cell. The difference can be seen because a vesicle forms around the molecule entering in endocytosis, which forms a vesicle. The opposite will occur in exocytosis.
Explanation:
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what is meant by “gross examination”?
A: looking at things most people find disturbing like open wounds, vomit, blood
B: looking at things with the naked eye
C: looking at things under a microscope
D: looking at toxicology results
Answers
Answer:
Hi there, your answer is B
Explanation:
Gross examination deals with looking at specimens with the naked eye that includes able to diagnosis a certain sickness by looking at the affected organ you can see if that organ had a tumor or other problems.
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Which limiting environmental factor or overexploitation of a resource led to the collapse of the Chaco Canyon civilization? conversion of forest to grazing habitat Odiseases introduced by explorers O 50 year drought O topsoil erosion due to agricultural practices Question 19 The literate life expectancy is 69.6 for Italy. This means that the average Italian O born to a woman with at least a high school education will live to nearly 70 years. woman has a nearly 70% chance of completing at least a secondary education. who completes at least a secondary education will live to nearly 70 years. has the ability to read and write for nearly 70 years
Answers
The combination of a severe drought and unsustainable agricultural practices were the main factors that led to the downfall of the Chaco Canyon civilization.
The collapse of the Chaco Canyon civilization was mainly caused by a 50 year drought, which was a limiting environmental factor. This drought made it impossible for the Chaco people to grow crops, leading to food shortages, famine, and societal collapse. However, overexploitation of resources such as topsoil erosion due to agricultural practices also played a role in exacerbating the effects of the drought. The Chaco people relied heavily on agriculture, and the erosion of the topsoil made it even more difficult to grow crops during the drought. Diseases introduced by explorers and the conversion of forest to grazing habitat may have also contributed to the collapse, but they were not the primary causes.
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what is the common name for the boston fern
Answers
Answer:
Nephrolepis exaltata
Explanation:
Answer:
Nephrolepis Exaltata
Explanation:
Nephrolepis exaltata, known as the sword fern or Boston fern, is a species of fern in the family Lomariopsidaceae native to tropical regions throughout the world. An evergreen perennial herbaceous plant, it can reach as high as 40–90 centimetres, and in extreme cases up to 1.5 metres. It is also known as the Boston swordfern, wild Boston fern, Boston Blue Bell Fern, tuber ladder fern, or fishbone fern.
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osmolarity-detecting cells located in the nuclei of the (click to select) are stimulated by an increasing blood solute concentration.
Answers
An increasing blood solute content stimulates osmolarity-detecting cells in the hypothalamic nuclei, notably the supraoptic and paraventricular nuclei.
The control of antidiuretic hormone (ADH), also known as vasopressin, is the responsibility of these cells.Osmoreceptor cells in the hypothalamus notice changes when blood osmolarity rises, a sign of higher solute concentration. The posterior pituitary gland releases ADH as a result of the stimulation of the osmoreceptor cells, which then send signals to the supraoptic and paraventricular nuclei.Purification of urine and a reduction in water loss from the body are both aided by ADH's action on the kidneys to encourage water reabsorption. The release of ADH by the osmoreceptor cells in response to an increase in blood solute concentration contributes to maintaining correct osmolarity and fluid balance.
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HELP ME PLEASE!!!
1. Summarize each part of the brain from the central core, límbico system, cerebral cortex (the lobes), and Hemispheres (left ves right).
2. Summarize each part of the neutron and their functions and explain each of the neurotransmitters.
3. Summarize the glands and each of the hormones of the Endocrine System
(All of them should be about a paragraph)
Answers
Answer:
The human brain is one of the most complex systems on earth. Every component of the brain must work together in order to keep its body functioning. The brain and the spinal cord make up the central nervous system, which alongside the peripheral nervous system is responsible for regulating all bodily functions.
image
The central nervous system: 1. Brain 2. Brain stem 3. Spinal cord
Psychology seeks to explain the mental processes and behavior of individuals by studying the interaction between mental processes and behavior on a systemic level. Therefore, the field of psychology is tightly intertwined with the study of the brain.
Explanation:
Given that the economy is operating in the horizontal section of the aggregate supply curve in the simple Keynesian model, an increase in autonomous spending will ____________________ (assuming that the economy remains in the horizontal section of the aggregate supply curve).
Answers
In the simple Keynesian model, an increase in autonomous spending will increase real GDP (output) and employment (assuming that the economy remains in the horizontal section of the aggregate supply curve).
In the simple Keynesian model, the aggregate supply curve is divided into two sections: the horizontal section and the upward-sloping section. The horizontal section of the aggregate supply curve represents a situation where the economy is operating below its full capacity, with unused resources and high unemployment.
When the economy is in the horizontal section of the aggregate supply curve, it means that the economy is not experiencing supply constraints, and increases in demand can lead to an increase in output without causing inflationary pressures.
In this scenario, an increase in autonomous spending refers to an increase in spending that is not influenced by changes in income or prices, such as government spending or investment. When there is an increase in autonomous spending, it directly increases the total demand in the economy.
Since the economy is operating in the horizontal section of the aggregate supply curve, an increase in autonomous spending will lead to a larger increase in real GDP and employment. This is because the increase in demand stimulates businesses to produce more output, and since there are idle resources in the economy, the increase in production can occur without putting upward pressure on prices.
An increase in autonomous spending in the horizontal section of the aggregate supply curve will result in an increase in real GDP and employment in the simple Keynesian model.
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What tool is more precise to measure the volume of water and why?
Answers
Answer:
Graduated Cylinder The most precise way to calculate the volume of an object, especially in the case of an irregularly formed object, is to immerse it in water and measure how much water it displaces. What is the more precise mass or volume measurement? Generally, mass is calculated by tools called balances.
<<<Paraphrased>>>
What role does vasoconstriction play in thermoregulation
Answers
Explanation:
In endotherms, warm blood from the body's core typically loses heat to the environment as it passes near the skin. Shrinking the diameter of blood vessels that supply the skin, a process known as vasoconstriction, reduces blood flow and helps retain heat.Thus, the blood returning to the heart has not lost much heat.
Answer:
Reduces blood flow and helps retain heat thus the blood returning to the heart has not lost much heat