Answers
There are two points of equilibrium: N = 0 and N = K.
It is stable at the equilibrium point N = K and N = 0 is unstable.
How to determine equilibrium points?The logistic model is given by:
dN/dt = rN(1 - N/K)
where N = population size, t = time, r = intrinsic growth rate, and K = carrying capacity.
To find the equilibrium points, we set dN/dt = 0 and solve for N:
rN(1 - N/K) = 0
This equation has two solutions: N = 0 and N = K. Therefore, the equilibrium points are N = 0 and N = K.
To find the linearization about N = 0, take the derivative of dN/dt with respect to N and evaluate it at N = 0:
f(N) = rN(1 - N/K)
df/dN = r(1 - 2N/K)
df/dN|N=0 = r
The linearization about N = 0 is therefore:
dN/dt = rN
This is a simple exponential growth model, and the equilibrium point N = 0 is unstable.
To find the linearization about N = K, take the derivative of dN/dt with respect to N and evaluate it at N = K:
f(N) = rN(1 - N/K)
df/dN = r(1 - 2N/K)
f/dN|N=K = -r
The linearization about N = K is therefore:
dN/dt = rN(K - N)/K
This is a simple logistic growth model, and the equilibrium point N = K is stable.
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Related Questions
When DNA is condensed in a form that can be seen with a microscope as it prepares for cell division it is called?
Answers
Answer:
The condensed form of DNA that can be seen with a microscope as it prepares for cell division is called chromatin.
Explanation:
Due to the introduction of rainbow smelt, Lame Winnipeg becomes crowded and some fish species do not survive. Limiting factor?
Answers
Dependent on Density An increase in the number of yellow perch leads to an increase in the number of northern pike since the latter preys on the former. The rising warmth of the water causes a lot of fish to die.
What is rainbow smelt?These smelt are eaten by walleye, trout, and other larger fish. The rainbow smelt are aggressive and will consume practically any fish they come across, although they favour juvenile ciscoes, zooplankton like calanoid copepods, and other tiny invertebrates..
What color is a rainbow smelt?In saline water, rainbow smelt are often olive green dorsally and silvery white in hue. With colourless fins, the sides of the rainbow smelt frequently have purple, blue, or pink iridescence.
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Students model the inheritance of genes with marbles. For a certain trait
they use pairs of marbles to represent the genes of the mother and the
father. Light and dark marbles represent different versions of the gene,
and the combinations of marbles from the mother and father represent
the combinations the offspring may end up with the sex of the offspring
is determined by a random flip of a coin. What combination will the
stlidents never be able to create with this method?*
Mother
Father
Mole
Offspring
Answers
Answer:
Any offspring with two light color marble
Explanation:
The student can never be able to create an offspring with two light color marble.
The combination of marbles from the mother and father represents the combination the offspring may end up with. The mother and the father contribute one marble each to arrive at the combination of the offspring and in this case, only one light color marble exists between both mother and father. Hence, there is no way an offspring with two light color marble can be produced.
In order to produce an offspring with two light color marbles, both the mother and the father must have, at least, a light color marble in their combinations and each must donate this marble to form the offspring's combination. However, this is not the case as only the mother has one light color marble and the father does not have any.
From the model, a male and a female with one light and one dark marble combination can be produced while offspring with two dark marbles can also be produced.
List four uses of lactic acid fermentation. List four uses of alcoholic fermentation.
Answers
Answer:
The most commercially important genus of lactic acid-fermenting bacteria is Lactobacillus, though other bacteria and even yeast are sometimes used. Two of the most common applications of lactic acid fermentation are in the production of yogurt and sauerkraut.
Lactic acid fermentation happens in our muscle cells when we are exercising feverishly, while alcoholic fermentation is used in yeast cells and is what leads to beer, bread, and wine.
Drag each label to the correct location.
Geologists study a variety of other characteristics to identify minerals, such as texture, magnetism, streak plate markings,
density, and specific gravity. Use the information you have already gathered, in addition to a few other properties of
minerals, to identify the seven minerals in the chart below. If you need help using the graduated cylinder or scale,
consult the lab instruments and measurements guide. If you do not have access to the seven minerals given, use this
resource to complete the chart.
metallic
nonmetallic
quartz
black markings on
the streak plate
harder than the
streak plate
(hardness greater
than 7)
softer than an iron nail
(hardness less
than 4.5)
gypsum
pyrite
softer than a
fingernail
(hardness less
than 2)
harder than a
fingernail
(hardness greater
than 2)
slippery
feeling
not slippery
feeling
magnetite graphite
magnetic
nonmagnetic
density near
3 g/ml
density near
2 g/ml
fluorite talc
Answers
The correct labeling to the proper location is given below:
Metallic: PyriteNonmetallic: QuartzBlack markings on the streak plate: GraphiteHarder than the streak plate: FluoriteSofter than an iron nail: TalcSofter than a fingernail: GypsumHarder than a fingernail: MagnetiteSlippery feeling: TalcNot slippery feeling: FluoriteMagnetic: Pyrite, MagnetiteNonmagnetic: Quartz, GraphiteDensity near 3 g/ml: MagnetiteDensity near 2 g/ml: GypsumWhat is Geology?Natural science's field of geology examines the features or rocks that make up Earth and other astronomical objects, as well as how they change over time.
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Comment on the folding of protein in vaccum
Answers
Answer:
Protein folding is a process by which a polypeptide chain folds to become a biologically active protein in its native 3D structure. ... The amino acids in the chain eventually interact with each other to form a well-defined, folded protein. The amino acid sequence of a protein determines its 3D structure.
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Javier and Jessica are measuring the water temperature of a stream. Javier records the water temperature as 56 degrees. Jessica tests the water at the same location but finds the temperature to be 13 degrees. What is most likely cause of the different results and how should they be remedied in the future
Answers
The most likely cause is using different temperature scales. They should use the same scale and calibrate equipment.
Javier recorded the temperature as 56 degrees, which may suggest he was using the Fahrenheit scale. Meanwhile, Jessica found the temperature to be 13 degrees, indicating she may have been using the Celsius scale.
The two scales have different freezing and boiling points, which can result in significantly different temperature readings. To avoid this issue in the future, they should ensure they are using the same temperature scale and regularly calibrate their equipment to ensure accurate measurements. By doing so, they can increase the reliability of their results and minimize measurement errors.
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Owen Unger, a 19-month-old male, is admitted to the hospital by his pediatrician, Dr. Curtis, after a chest x-ray confirmed the child has pneumonia. Dr. Curtis and Mrs. Unger, Owen’s mother, discuss the child’s fever, cough, and diarrhea. Mrs. Unger provides a pertinent PFSH. An extended problem-focused ROS is completed and an extended examination of the cardiovascular and respiratory systems is performed. The course of treatment planned by Dr. Curtis is straightforward as the child’s condition is of low severity. What is the principal diagnosis code?
Answers
Dr. Robert Koch discovered Mycobacterium tuberculosis in 1882. The illness was widespread and typically fatal. The disease affects victims in two ways, but quarantine in tuberculosis sanitariums, medical intervention, and code-based reporting systems significantly reduce cases.
Patients having symptomatic TB are known to have effects on various body areas.
Patients with latent TB don't feel ill, but if they don't get treatment, they could develop symptoms.
Patients with the illness typically have positive sputum and skin tests, abnormal chest X-rays, and may present the following symptoms, according to the Centers for Disease Control and Prevention (CDC):
a bad cough that lasts 3 weeks or longerpain in the chestcoughing up blood or sputumweakness or fatigueweight lossno appetitechillsfeversweating at nightICD-10-CM code sections A15 through A19 are reserved for diagnosis of tuberculosis caused by Mycobacterium tuberculosis or Mycobacterium Bovis. Look to P37.0 if congenital TB is the patient's diagnosis. R76.11 should be used to report a positive skin test for latent tuberculosis or for active disease. Through B90.x, the sequela may be reported. Report J65 if the patient has tuberculosis-related silicotuberculosis pneumoconiosis. For screening for respiratory tuberculosis, visit Z11.1. If the patient is a TB carrier, report Z22.
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3. What is the purpose of the oil on the oil immersion lens?
Oil provides a medium for the bacteria to float on the slide
O oil prevents light distortion and makes the images clearer
Oil is a lubricant and allows the objectives to slide easily
O oil prevents any water from seeping into the cover slip
Answers
Answer:
b
Explanation:
the oil makes sure the light doesn't disturb the image
FUN QUESTION maybe challenging I'm sort stuck i can't figure out!!
IF i were to mix serval animals together such as rat a lizard and an ant what would you name it? (it cant be named like you name a dog it has to have somehting to do with the mixture!!!!
Answers
Answer:
It could be called Rizant or a Lizatant..
Undigested food or old cell particles can be eliminated from the cell by:Answer Choice:pinocytosisexocytosisphagocytosisendocytosis
Answers
Celular debris can be eliminated by exocytosis, this is a process in which the material to be discarded is wrapped in a vacuole. This vacuole is then sent to the cellular membrane with which it fuses releasing the content to the extracellular media
What is the difference (in structure and/or function) between the adrenal glands and the suprarenal glands?
Answers
Answer:
The adrenal glands, also called suprarenal glands, are a pair of glands occurring on the top of kidneys and produce different steroid hormones. Adrenal glands consist of two distinct structures; the adrenal cortex and adrenal medulla, both of which are different in structure as well as functions.
Which organism has an endoskeleton?An arthropod. For example: a crab.A mammal. For example: a humanA Cnidarian: For example: a jellyfish
Answers
The correct answer is A mammal. For example: a human
An endoskeleton is an internal skeleton that consists of hard, mineralized structures located within the soft tissue of organisms.
All arthropods have a hard exoskeleton.
Jellyfish do not have a proper skeleton.
Hi can someone please help me with these 2 bio questions!!
Answers
Once DNA is extracted from an organism, one application is to use it for PCR (polymerase chain reaction) analysis. PCR is a laboratory technique used to amplify a specific region of DNA, producing millions of copies of the target DNA sequence.
What is the application of extracting DNA?Application is to use it for PCR (polymerase chain reaction) analysis.
PCR has a wide range of applications, including genetic research, medical diagnosis, forensic analysis, and environmental testing.
In the case of strawberry DNA extraction, PCR analysis could be used to detect and amplify specific genes that are responsible for desirable traits.
Similarities:
Both strawberry and cheek cell DNA extractions use similar initial steps to break down cell membrane and release DNA into solution. This involves the use of buffer solution and physical mechanism to break cell wall and nucleus, such as grinding for strawberries and swishing with salt water for cheek cells.
Both methods of DNA extraction require the use of DNA-binding substance to capture and purify the DNA from other cellular components.
Differences:
The yield of DNA is much higher in cheek cell extractions than in strawberry extractions. This is because there are more cells in the mouth than in single strawberry and DNA content of cheek cells is much higher than in plant cells.
DNA extracted from strawberries may contain impurities like proteins, carbohydrates, and pigments that can interfere with downstream applications. In contrast, DNA extracted from cheek cells is relatively pure and can be used directly for various applications without further purification steps.
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What is it called when groups of organisms show a rapid rate of diversification in their form for a period of time?
Adaptive radiation
Extinction
Macroevolution
Speciation
Answers
The term for groups of organisms showing rapid diversification in their form for a period of time is "adaptive radiation."
The term that describes groups of organisms showing a rapid rate of diversification in their form for a period of time is "adaptive radiation." Adaptive radiation occurs when a single ancestral species gives rise to multiple descendant species, each adapted to different ecological niches or environments.During adaptive radiation, organisms exploit vacant ecological niches, leading to the evolution of diverse traits and adaptations. This process often occurs in response to significant environmental changes, such as the availability of new resources, colonization of new habitats, or following mass extinctions.Adaptive radiation can lead to the emergence of new species with distinct morphological, physiological, and behavioral characteristics. It plays a crucial role in shaping the diversity and complexity of life on Earth, resulting in the evolution of various species that are specialized to thrive in different ecological settings.For more such questions on Diversification:
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10. Which of the following is NOT a cause for global warming?
b. planting new trees
O d. industrial and human activities
c. emissions from vehicles
a. burning fossil fuels
Answers
Answer:
B
Explanation:
planting trees helps the earth, they give oxygen
Answer:
b)
Explanation:
Planting new trees benefits the environment
Which of the following elements is required for growth and development and is in our DNA? *
hydrogen
carbon
oxygen
nitrogen
phosphorus
Answers
Which natural resources did early humans need for basic survival?
A. Early humans needed tools made from rocks.
B. Early humans needed material to make boats with sails to get from place to place.
C. Early humans needed water, plants and animals for food.
D. Early humans needed fresh water and clean air.
Answers
Answer:
i think C. Early humans needed water, plants and animals for food.
Explanation:
Water, plants and animals are the basic needs for survival other then tools made out of rocks, even though A could be the right answer too.
8. What unit of power is equal to 746 watts?
The unit power is equal to 764 watts is one horsepower (1, Hp).
9. Using your answer to the previous question and slide 28, identify how many joules of energy can be produced by a horse every second?
Answer questions 10-12 based on the following:
It requires a vertical force of 2450 N to raise a crane 120 m in 3 minutes.
10. How much work is done?
11. How much power is produced?
12. What is the mass of the crane?
Answers
Answer:
Hey i need this one please
Explanation:
Which of the following describes a properly controlled experiment?
Answers
Answer:b
Explanation:
The fetus is connected by the umbilical cord to the placenta, the organ that develops and implants in the mother's uterus during pregnancy. Through the blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta.
Answers
The placenta is an organ that develops in the uterus during pregnancy. This structure provides oxygen and nutrients to a growing baby.
The placenta and foetus are connected by the umbilical chord, which is crucial. The rope-like umbilical cord joins the foetus to the placenta during pregnancy. Two arteries and a vein are found in the umbilical cord, which transports nutrition and oxygen to the foetus as well as waste materials away from the baby.The umbilical cord connects the developing infant to the placenta. Through the placenta and blood arteries in the umbilical cord, the baby receives all the nutrients, oxygen, and life support that it needs from the mother's blood. The umbilical cord is regarded as the fetus's and mother's physical and psychological connection.
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The acidification of the stomach juices is important for the digestion of proteins because: Group of answer choices Proteins are basic, and need to be neutralized.
Answers
Answer:
See the answer below
Explanation:
The acidification of stomach juices is important for the digestion of proteins partly because the enzyme responsible for protein digestion work in an acidic medium and the acid also facilitates the unfolding of the proteins.
Hydrochloric acid and the enzyme responsible for the initiation of protein digestion, pepsin is secreted as gastric juice by the stomach, and the latter works by breaking down protein chains into smaller fragments.
Main Steps of the Scientific Method: 1. ________________________________________ 2. ________________________________________ 3. ________________________________________ 4. ________________________________________ 5. ________________________________________ 6. ________________________________________
Answers
The scientific method is a systematic approach used by scientists to investigate and understand the natural world these steps are iterative, meaning that scientists often repeat the process, refining their hypotheses and experiments to gain a deeper understanding of the phenomenon under investigation.
It involves a series of steps that help ensure objectivity, reproducibility, and reliability in scientific research.
The main steps of the scientific method are as follows:
Observation: The first step involves making careful observations of a phenomenon or a problem in the natural world.
Scientists use their senses or instruments to gather data and identify patterns or interesting phenomena.
Question: Based on the observations, scientists formulate a research question that addresses the underlying cause or mechanism of the observed phenomenon.
The question should be specific and testable to guide the subsequent steps.
Hypothesis: In this step, scientists propose a possible explanation or solution to the research question.
The hypothesis is a tentative statement that can be tested through further experimentation or observation.
It should be based on existing knowledge and provide a clear prediction.
Experimentation: Scientists design and conduct experiments to test the hypothesis.
They manipulate variables, control conditions, and collect data to analyze and draw conclusions.
The experiment should be carefully planned, with appropriate controls and statistical methods to ensure accurate and reliable results.
Analysis: After collecting the data, scientists analyze the results using statistical methods or other analytical techniques.
They examine the data to determine if it supports or refutes the hypothesis.
This step involves organizing and interpreting the data to draw meaningful conclusions.
Conclusion: Based on the analysis, scientists draw conclusions about the hypothesis.
If the data supports the hypothesis, it may be accepted as a plausible explanation.
If the data does not support the hypothesis, scientists may revise the hypothesis or propose alternative explanations.
Through this iterative process, scientific knowledge advances and contributes to our understanding of the natural world.
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Which of the following would be considered an example of commensalism?
a
A tapeworm living in the digestive system of a mammal. The tapeworm uses some of the food for its own energy that the mammal eats.
b
A hummingbird and a flower. The hummingbird receives food from the flower, and the flower uses the hummingbird to spread its pollen.
c
The lamprey and a fish. The lamprey attaches to the outside of the fish and utilizes its flesh for food.
d
A barnacle growing on a whale. The whale moves the barnacle to places where food can be found, but the whale is not harmed.
Answers
Answer: B) A hummingbird and a flower. The hummingbird receives food from the flower, and the flower uses the hummingbird to spread its pollen.
Explanation: Commensalism is a symbiotic relationship between two species in which one benefits and the other is unaffected.
Credit: KhanAcademy
Natural selection is a process by which organisms that are better adapted to their environment tend to
increase in size.
migrate.
evolve new traits.
survive.
Mark this and return
Answers
Answer:
Survive is the correct answer
Explanation:
Natural selection is the process through which populations of living organisms adapt and change. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others. Individuals with adaptive traits—traits that give them some advantage—are more likely to survive and reproduce. These individuals then pass the adaptive traits on to their offspring. Over time, these advantageous traits become more common in the population
In cats, the Dense pigment gene, D/d, codes for melanophilin, a protein involved in the transportation and deposition of pigment into a growing hair. A separate gene, M/m, is responsible for the production of the pigment, with M_ producing black pigment and mm producing brown. When a cat has two recessive d alleles, its fur is a light gray color regardless of which alleles of M/m are present.
Required:
State the phenotype and frequency for each of the following outcomes of a dihybrid cross:
a. M_D_
b. M__dd
c. mmD
d. mmdd
Answers
Answer:
a. M_D_ : 9/16 Black furred individuals
b. M__dd : 3/16 gray furred individuals (1/16 MMdd + 2/16 Mmdd)
c. mmD_ : 3/16 Brow-furred individuals (1/16 mmDD + 2/16 mmDd)
d. mmdd: 1/16 gray furred individuals.
Explanation:
Available data:
Dense pigment gene, D, codes for melanophilin.D allele dominant over d. Gene M/m is responsible for the production of the pigmentM is dominant over mIf D is present, M/m is expressedIf dd is present, M/m is not expressed DDMM, DdMM, DDMm, DdMm --->Black furDDmm, Ddmm ---> Brown furddMM, ddMm -----> Light gray furCross: between two dihybrids
Parental) DdMm x DdMm
Phenotype) Black-furred Black-furred
Gametes) DM, Dm, dM, dm DM, Dm, dM, dm
Punnet Square) DM Dm dM dm
DM DDMM DDMm DdMM DdMm
Dm DDMm DDmm DdMm Ddmm
dM DdMM DdMm ddMM ddMm
dm DdMm Ddmm ddMm ddmm
F1) 9/16 Black-furred individuals, D-M- (1/16 DDMM + 2/16 DDMm + 2/16
DdMM + 4/16 DdMm)
3/16 Brown-furred individuals, D-mm ( 1/16 DDmm + 2/16 Ddmm)
4/16 Gray-furred individuals, dd-- ( 1/16ddMM + 1/16 ddmm + 2/16 ddMm)
Which of these forms when air moves in the directions shown by the arrows
in the diagram?
A. Sea breeze
B. Valley breeze
C. Mountain breeze
D. Land breeze
Answers
Answer:
D. Land Breeze
Answer:
its land breeze
Explanation:
In an energy pyramid, the bottom level represents...
A. consumers
B. producers
C. scavengers
D. decomposers
Answers
Answer: B. Producers
Explanation:
Answer:
B. producers
Explanation:
i'm pretty sure because i've had it on a test before and decomposers are off to the side, but producers are on the bottom. it could possibly be decomposers based on which charts you use since some put decomposers on the bottom, but most are producers
What part of the brain is the arrow pointing to in the diagram?
Answers
Answer:
The Occipital Lobe
Explanation:
The Brain is the part of the central nervous system enclosed in the cranium of humans other vertebrates, consisting of soft, convoluted mass of gray and white matter and serving to control and coordinate the mental and physical actions.
The Occipital Love is the most posterior love of each cerebral hemisphere, behind the parietal and temporal lobes.
One of the following organs is located on the Inferior surface of the liver in the right hypochondriac regions of the nine region plan:
Gall bladder
Pancreas
Left lobe of the liver
Right Lung