The way that the agouti and the Brazil tree depend on each other, is that the agouti like the seeds of the Brazil tree and bury others, so it helps to plant new Brazil trees, to understand this story more, we need to know that .....
Agouti and the Brazil
The fruits will be opened by agoutis, rodents with mighty ones. Agoutis gnaw the thick, hard shell of the fruit to catch the nuts that are inside. And that's when even more amazing things happen. Like agoutis with some seeds and burying others to eat later. But he can't find all the chestnuts they buried, which end up germinating, giving rise to new chestnut trees!
After the agoutis empty the chestnut tree, it turns into an open bowl in the middle of the forest, which puddles rainwater, also a pool where insects such as mosquitoes and dragonflies lay eggs, and some amphibians found only in the Amazon.
With this information, we can conclude that the relationship between the agoutis and the Brazil tree is that this rodent helps to bury seeds and the germination of the Brazil tree.
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1. Why don’t microorganisms in cultures exhibit constant exponential growth? What are some steps you could take to extend the lifespan of a microbial culture? 2. Using a textbook or a reputable online source, describe how lab cultures are maintained in a continual pattern of growth. Focus particularly on those used in biotechnology, such as E. Coli, which is used to make human insulin. 3. Which of these has a constant growth pattern: an open system or a closed system? 4. A human patient represents what kind of system for bacterial infections? 5. You’re a physician trying to isolate bacterial colonies from the human gut in attempt to diagnose a gastrointestinal infection. You streak your sample on a growth media containing glucose, amino acids, and salts that contain both sulfur and phosphorous with a pH of 7. You incubate the plates in aerobic conditions at 37 ˚C for three days, at which point you can see clear bacterial colonies forming on the plate. Would you feel confident in stating that you had successfully cultured all the bacteria from your gut sample? Why or why not?
4. A human patient represents a host system for bacterial infections, where the human body provides an environment for bacterial growth and proliferation.
Microorganisms, lab cultures, closed system and bacteria colonies1. Microorganisms in cultures do not exhibit constant exponential growth due to limited nutrient availability, accumulation of waste products, and unfavorable environmental conditions. To extend the lifespan of a microbial culture, steps such as providing fresh nutrient media, subculturing, and optimizing growth conditions can be taken.
2. Lab cultures, including those used in biotechnology like E. coli for insulin production, are maintained through aseptic techniques and controlled growth conditions. E. coli cultures are subcultured in fresh media containing necessary nutrients and incubated under monitored conditions to ensure optimal growth.
3. A closed system exhibits a constant growth pattern, where microbial culture is contained without exchange of nutrients or waste products with the external environment.
5. Observing clear bacterial colonies on the growth media plate after incubation does not guarantee successful culture of all bacteria from the gut sample. Some bacteria may have specific nutritional requirements not provided in the medium, and the incubation conditions may not be suitable for all bacteria.
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Which of the following is a pyrimidine base in DNA?
A. Adenine
B. Guanine
C. Thymine
D. Purine
Answer:
Option C thymine is a pyrimidine base in DNA
Explanation:
In an energy pyramid, what organisms have the most energy available? *
1.) herbivores
2.) producers
3.) carnivores
4.) top predator
Answer:
I think producers
Explanation:
In an energy pyramid, producers have the most energy available. The correct option is 2.
What is energy pyramid?A graphic that depicts the biomass or bioproductivity at each trophic level in an ecosystem is called an ecological pyramid.
An ecosystem's energy transfer from one trophic, or feeding, level to the next is depicted by an energy pyramid.
The model is a figure that contrasts how much energy different trophic levels of species use. Kilocalories are the units used to measure the energy in an energy pyramid (kcal).
The producers are located in the base of the pyramid, which is also its greatest level.
The amount of energy diminishes and the levels get smaller as you progress up the pyramid, via the trophic levels to primary, secondary, and tertiary consumers.
Thus, the correct option is 2.
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match the stage of the cell cycle with the events that occur: mitosis
The stage of the cell cycle associated with mitosis is the M phase.
The cell cycle consists of a series of stages that a cell goes through as it prepares for division and ultimately divides into two daughter cells. The stages of the cell cycle are interphase (which includes G1, S, and G2 phases) and the M phase, which stands for "mitosis" or "cellular division."
During the M phase, which is relatively short compared to interphase, the nucleus of the cell undergoes division, resulting in the separation of the replicated genetic material and the formation of two identical daughter nuclei. The M phase consists of several sub-stages, including prophase, prometaphase, metaphase, anaphase, and telophase.
Here is a brief description of the events that occur during each stage of mitosis:
1. Prophase: The chromatin (long, thin strands of DNA) condenses into visible chromosomes. The nuclear envelope starts to break down, and the mitotic spindle, composed of microtubules, begins to form. The centrosomes move to opposite poles of the cell, and spindle fibers attach to the centromeres of the chromosomes.
2. Prometaphase: The nuclear envelope completely disintegrates, and the spindle fibers extend from the centrosomes towards the chromosomes. The chromosomes become more condensed, and each sister chromatid is attached to microtubules from opposite poles.
3. Metaphase: The chromosomes align at the equatorial plane or the metaphase plate, forming a single line. The spindle fibers are fully developed and attach to the kinetochores (protein structures) on the chromosomes' centromeres.
4. Anaphase: The sister chromatids separate and are pulled apart by the spindle fibers, which shorten and retract. Each chromatid is now considered an independent chromosome. The chromosomes move towards opposite poles of the cell.
5. Telophase: The chromosomes reach the opposite poles of the cell. Nuclear envelopes begin to re-form around the separated chromosomes. The chromosomes begin to decondense back into chromatin. The mitotic spindle disassembles, and cytokinesis (division of the cytoplasm) typically begins.
Following telophase, cytokinesis completes the cell division process, resulting in the formation of two daughter cells, each with its own nucleus and a portion of the cytoplasm.
Overall, mitosis ensures the accurate distribution of genetic material to daughter cells and is essential for growth, development, tissue repair, and asexual reproduction in multicellular organisms.
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How would population pyramids help Game and Fish organizations give out hunting permits for certain populations?
Population pyramids can help Game and Fish organizations make informed decisions about hunting permits for certain populations by providing a visual representation of the age and sex distribution of the population.
This information can help the organization determine which populations are healthy and sustainable, and which populations may need protection.
For example, a population pyramid with a large number of individuals in the younger age groups and a smaller number of individuals in the older age groups may indicate a healthy and growing population. This population may be able to support hunting permits for a certain number of individuals, as long as the hunting is regulated and sustainable.
On the other hand, a population pyramid with a large number of individuals in the older age groups and a smaller number of individuals in the younger age groups may indicate a declining population. In this case, hunting permits may need to be restricted or eliminated altogether to allow the population to recover.
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Động vật nào dưới đây thuộc bộ Gặm nhấm ?
Chuột chũi.
Chuột đồng.
Chuột chù.
Mèo rừng.
Answer:
chuột đồng
I hope it's helps you
What would happen if the cell membrane allowed any and all substances to enter/exit the
cytoplasm?
Answer:
The cell would probably die in a short amount of time because the cell membrance protects the cell from hazardous materials. If it just let any substances in, the cytoplasm would be exposed to it.
Explanation:
Which of the following describes any substance produced by a living organism that is poisonous to human beings?
A) Antibody
B) Acid
C) Toxin
D) Antigen
The substance produced by a living organism that is poisonous to human beings is referred to as a toxin (C).
What exactly is a toxin?A toxin is any substance produced by a living organism, such as bacteria, fungi, plants, or animals, that is harmful or poisonous to human beings. Toxins are typically synthesized by organisms as a defense mechanism or as a means to incapacitate or kill prey. When humans come into contact with toxins, they can cause adverse effects on the body, ranging from mild symptoms to severe illness or even death. Toxins can target specific organs or systems in the body and disrupt their normal functioning. Examples of toxins include botulinum toxin produced by certain bacteria, venom from snakes or spiders, and poisonous compounds found in certain plants or mushrooms.
Antibodies, on the other hand, are proteins produced by the immune system in response to the presence of foreign substances called antigens. Antibodies help to identify and neutralize antigens, such as bacteria or viruses, as part of the body's immune response.
Acid is a general term for a substance that has a low pH and can donate protons or accept electrons. Acids can have various effects on the body, but they are not inherently produced by living organisms.
Antigens are substances, usually proteins, that can trigger an immune response in the body. They are recognized by the immune system as foreign or non-self, leading to the production of antibodies. Antigens can come from pathogens, such as bacteria or viruses, or from other sources such as allergens or transplanted tissues.
Hence, toxin is the substance that is poisonous to human beings.
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If the earth was once cold and then warmed again, what caused the warming?
Cladograms are scientific hypotheses that can be overturned by new data. True False Angiosperm plants did not appear until after the extinction of the dinosaurs. True False The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". True False In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. True False The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". True False An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. True False
An ichnofossil is any part of the hard skeleton left behind by a vertebrate in the fossil record. This statement is false. An ichnofossil is a trace fossil, which is any indirect evidence of past life, such as tracks, burrows, and feces. It is not part of the hard skeleton left behind by a vertebrate.
Cladograms are scientific hypotheses that can be overturned by new data. This statement is true. Cladograms are diagrams that show the evolutionary relationship between organisms based on various traits. New data can cause changes to be made to cladograms which can result in a change to the interpretation of the evolutionary history of organisms.
Angiosperm plants did not appear until after the extinction of the dinosaurs. This statement is false. Angiosperms, also known as flowering plants, appeared in the fossil record at least 140 million years ago. Although the dinosaurs went extinct around 66 million years ago, angiosperms were already widespread and diversifying by that time.
The definition of an analogous character is "a character that has a similar function to a character in a different organism, but these similarities are due to different evolutionary origins". This statement is true. Analogous characters are traits that have evolved independently in different groups of organisms due to similar environmental pressures and not due to a shared ancestor.
In evolution, non-genetic changes that occur during an organism's life span, such as increases in muscle mass due to exercise and diet, cannot be passed on to the next generation. This statement is true. Non-genetic changes that occur during an organism's life span are not heritable and cannot be passed on to the next generation. Only genetic changes that occur in the germ cells, such as mutations, can be passed on to the offspring.
The definition of a monophyletic group is "a group of organisms that has a single ancestor and contains only some of the descendants of this unique ancestor". This statement is false. A monophyletic group is a group of organisms that has a single ancestor and contains all of the descendants of this unique ancestor. This group is also called a clade.
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Cientit ued radioactive hydrogen to make water. They grow plant uing radioactive water. What happened to the radioactive hydrogen during cellular repiration?
During cellular respiration, metabolic water would contain radioactive hydrogen.
Using the energy generated by the flow of electrons down the electron transport chain (ETC), hydrogen ions are pushed into the intermembrane gap (electricity). Through ATP synthase, the hydrogen ions will return to the mitochondria's matrix and form ATP.
When hydrogen and oxygen combine to make H2O in the electron transport chain, the last phase of cellular respiration, water is created which is known as metabolic water.
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the force of attraction between any two objects
Answer:
Gravitational force
Explanation:
Amino acids must have all BUT
which of the following?
A. an amino group
B. a phosphate group
C. a carboxyl group
Answer:
B. a phosphate group
Explanation:
Phosphate group is not there in Amino acids.
It changes a protein's structure by altering interactions with amino acids.What is amino acids?Amino acids, also referred to as the building blocks of proteins, are compounds that play many important roles in body. They are need for processes such as building proteins, hormones, and neurotransmitters. Amino acids are present in protein-rich foods such as meat, fish, and soybeans.What are proteins?A protein is a naturally occurring, complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many important biological compounds such as enzymes, hormones, and antibodies.To know more about Proteins here
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2. Feelings of depression may range from often feeling "down" to profound sadness and a sense of loss
Which of the following statements about depression is true?
A. Depression is the most frequent mental health problem of older adults.
B. Depression occurs more frequently in older adults than in younger adults,
c. Older adults are very responsive to treatment for depression
Among the given statements, statement C is true: Older adults are very responsive to treatment for depression.
Depression is a common mental health issue that can affect individuals of any age, including older adults. While it might be a prevalent issue among older individuals, proper treatment, such as therapy and medication, can effectively alleviate symptoms and improve their quality of life.
It is crucial to identify and address depression in older adults, as it can impact their overall health, relationships, and daily functioning. By seeking appropriate treatment, older adults can manage and overcome their feelings of depression, ultimately enhancing their well-being and mental health.
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Which of the following factors does not impact the infiltration rate of
water?
The porosity/permeability of the soil
The water table level
The rate of precipitation
The amount of pollution in a nearby stream
Answer:
The amount of pollution in a nearby stream
Infiltration is the process in which the water seeps into the soil surface. Thus, option B is correct.
What is Infiltration?Infiltration is an important phenomenon that defines percolation of water in the soil. It is important for maintaining the ground water level.
The water seeps down into the soil gradually through capillary action. Infiltration is mostly observed during a rainfall.
Infiltration takes place till the soil accomodates maximum water. Beyond that, infiltration will stop as the soil is said to be saturated with water.
Infiltration is measured in inches per hour. It is the depth of water enters into the soil in an hour.
Infiltration rate is determined by various factors. Soil porosity and texture of the soil is one such important factor for water infiltration.
Porosity of the soil can be deteriorated through human activities. Large pores hinder percolation of water.
Infiltration is also determined by the intensity and duration of precipitation.
Therefore, infiltration is important for increasing the water table for further water storage.
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which of the following are normally excluded from the filtrate entering bowman's space?multiple select question.charged ions like na and k red blood cellsalbuminsglucoseglobulinsfatty acids bound to plasma proteins
Charged ions like Na and K and red blood cells are normally excluded from the filtrate entering Bowman's space. Albumins, globulins, and fatty acids bound to plasma proteins are generally too large to pass through the filtration barrier, but small amounts may still be present in the filtrate. Glucose, on the other hand, is normally freely filtered and reabsorbed by the kidneys.
The components that are normally excluded from the filtrate entering Bowman's space are red blood cells, albumins, globulins, and fatty acids bound to plasma proteins. These larger molecules and cells are typically not able to pass through the filtration barrier, while smaller charged ions like Na and K, as well as glucose, can be found in the filtrate.
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Why does an atom have a neutral charge?
A. It has equal numbers of electrons and neutrons.
B. The number of neutrons equals the number of protons and
electrons in the atom.
C. It has equal numbers of electrons and protons.
D. It has equal numbers of neutrons and protons.
ITS C
A virus is made of a protein shell that carries
DNA. Which statement best describes how
the virus can be classified according to cell
theory?
Answer:
it is classified as non living or a prokeriote.
Explanation:
What did Native Americans call the Everglades? (5 Themes Region box on left)
Answer:
Explanation:
These Indians of the Everglades were labeled as Seminoles, which comes from the Spanish word Cimarron meaning ‘wild’, or ‘escaped slave’. In the 1950s, the Federal government tried to cut ties with all tribes and South Florida Indians then responded by forming their own tribe known as the Seminole Indians.
What would happen if a populations chose their mates randomly?
A. Allele frequency would be constantly changing at random
B. The allele frequency would stay relatively the same over time because there are no traits that are being selected for.
C. Randomly mating allows the most beneficial traits to be passed on because more individuals are going to select for them.
D. Allele frequency would begin to favor the dominant trait.
Answer:
B. The allele frequency would stay relatively the same over time because there are no traits that are being selected for.
Explanation:
Like recombination, non-random mating can act as an ancillary process for natural selection to cause evolution to occur. Any departure from random mating upsets the equilibrium distribution of genotypes in a population. This will occur whether mate selection is positive or negative assortative.
Which of the following is a correct sequence of the flow of blood in a systemic circulation?
A. Heart →aorta →arteries → arterioles capillaries→ tissues → venules → veins → superior and inferior vena cava → heart
B. Heart → pulmonary artery → lungs → pulmonary veins → Heart
C. Heart → pulmonary veins → lungs → pulmonary artery → Heart
D. Heart → venules → veins → capillaries → tissues → Aorta → arteries → arterioles → superior and inferior vena cava → heart
Answer:
The correct option is A. Heart →aorta →arteries → arterioles capillaries→ tissues → venules → veins → superior and inferior vena cava → heart
A company has an inventory of 1,400 assorted parts for a line of missiles that has been discontinued. The inventory cost is $74,000. The parts can be either (a) remachined at total additional costs of $27,500 and then sold for $34,000 or (b) sold as scrap for $5,500. Which action is more profitable? Show your calculations.
The following are the calculations to solve the problem that involves a company that has an inventory of 1,400 assorted parts for a line of missiles that has been discontinued. The inventory cost is $74,000.
The parts can be either (a) remained at a total additional cost of $27,500 and then sold for $34,000 or (b) sold as scrap for $5,500.
Let us solve the problem in the following steps:
Step 1: Calculate the Profitability of Option A - re-machining
Solution:
Total Cost of Remachining= $74,000 + $27,500 = $101,500
Profit from Selling= $34,000*1400 = $47,600,000
Profitability= Profit from Selling - Total Cost of Remachining= $47,600,000 - $101,500= $47,498,500 Step
2: Calculate the Profitability of Option B - Selling as Scrap
Solution:
Profitability of Selling as Scrap = $5,500*1,400= $7,700,000 Comparing the two options, Option A is more profitable than Option B as shown below: Option A: $47,498,500Option B: $7,700,000.
Therefore, the company should go for Option A and machine the parts for a profitable business venture.
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in other cases, researchers use natural experiments in which the dependent variable (typically a measure of organism health) is measured under differing contexts that are not manipulated. say, for example, that an accidental chemical spill contaminates five ponds. to determine the possible effects of the toxic chemical on frogs, a researcher could compare the hatching rate of frog eggs laid in those five ponds to the hatching rate of eggs laid in five uncontaminated ponds nearby. this would be an example of a natural experiment because concentrations of the toxic chemical in the ponds were not controlled by the experimenter, but rather resulted from the chemical spill.
In the given example, since the concentrations of the toxic chemical in the ponds were not controlled by the experimenter but rather resulted from the chemical spill, it is a natural experiment.
Natural experiments are also known as quasi-experiments, and they are used when the researcher cannot control the independent variable(s). Researchers use natural experiments to determine causality when it is unethical, impractical, or impossible to conduct a randomized controlled experiment. The independent variable(s) in a natural experiment is not controlled or manipulated by the researcher but rather occurs naturally.
Natural experiments are less rigorous than randomized controlled trials, but they can be useful in situations where a randomized controlled trial is impossible, unethical, or impractical. Accidental chemical spills are considered to be a natural experiment because they create an uncontrolled environment.
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Which is an example of pioneer species
Answer:
the answer is A:lichens
Explanation:
Explain how sulfur mining affects plant life.
Although the landscape shows a certain ability to persist, underground mining activity has caused some effects such as ground fissures (cracking), disturbance of the vegetation community and damage to strata.
although it can progress unnoticed for many years, hypertension wreaks havoc on the human body, so adults should have their blood pressure screened periodically. click to select the health conditions that may arise as a result of uncontrolled hypertension.
The health conditions that may arise as a result of uncontrolled hypertension are heart attacks, strokes, eyesight loss, and kidney damage.
What is blood pressure and resistant hypertension?Blood pushing against artery walls creates blood pressure. Each time the heart beats, the force is produced as the blood is pumped from the heart into the blood arteries. Blood pressure is also influenced by the artery walls' size, tone, and elasticity. By controlling the body's fluid and salt levels, the kidneys also control blood pressure.
Blood pressure that is resistant to aggressive medical therapy is high blood pressure. When each of the following statements is accurate, hypertension is said to be resistant.
Three distinct blood pressure drugs are being taken by someone at their highest tolerated dosages.A diuretic is one of the blood pressure treatments (removes fluid and salt from the body).Blood pressure Blood pressure that is resistant to aggressive medical therapy is high blood pressure.The risk of heart attack, stroke, and renal failure are all significantly increased by resistant hypertension. For months or years, resistant hypertension may go undetected, but when it does, it can lead to heart attacks, strokes, eyesight loss, and kidney damage. Some people have pseudo-resistant (seemingly resistant) hypertension, which is brought on by additional causes like taking medications that interact negatively with one another or having high blood pressure only when visiting a doctor. The diagnosis and treatment of pseudo-resistant hypertension are crucial.
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explain how the ch (himalayan) allele and tyrosinase control the siamese coat-color pattern. what is the underlying reason that certain parts of a siamese cat (e.g., tail and ears) are darker than the cat's trunk?
The Siamese coat color pattern is controlled by the ch (Himalayan) allele and the enzyme tyrosinase, which helps produce melanin.
The Himalayan allele is a recessive gene that causes light-colored fur in warmer areas and dark-colored fur in colder areas. This is due to a temperature-sensitive enzyme produced by the Himalayan allele.
At the cooler areas of the cat's body, such as the ears, feet, tail, and face, the Himalayan allele is more strongly expressed.
This is because tyrosinase, which is produced by the gene, is more active in these cooler areas. Higher tyrosinase activity leads to the production of more pigment in these areas, resulting in darker fur.
Because tyrosinase is most active at lower temperatures, the fur on the face, tail, paws, and ears is dark, while the rest of the body is light in color.
Therefore, the reason for the darker parts of the cat's body is the higher tyrosinase activity in cooler body areas, which leads to more pigment production in these parts.
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biologists who study biodiversity describe new species and monitor species of which we are aware. why is the study of biodiversity important in the anthropocene?
The study of biodiversity is important in the Anthropocene because it provides information about the species that go extinct every one thousand years.
Extinction happens when species are faded because of environmental forces consisting of habitat fragmentation, weather trade, natural disaster, over-exploitation by using people, and pollution, or because of evolutionary modifications in their members (genetic inbreeding, poor reproduction, decline in population numbers).
An extinction occasion is a giant and fast decrease in the biodiversity in the world. Such an occasion is recognized via a pointy change inside the diversity and abundance of multicellular organisms.
The main cutting-edge causes of extinction are the loss and degradation of habitat (Deforestation), over-exploitation, invasive species, climate exchange, and nitrogen pollutants.
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Which homeostatic process moves particles against a concentration gradient?
dynamic equilibrium
passive transport
osmosis
active transport
Answer:
Yes, the correct answers is D: active transport
Explanation:
got it right in edg 2020
hope this is of help :)
Answer:
D it’s the answer
Explanation:
A population of beetles is currently 60 beetles at n=0. The beetle population has an intrinsic growth rate of 150% each generation. The environment can sustain a maximum population of 130 beetles. Find the population of the next three generations, 'y_1' ' 'y_2' and 'y_3' of beetles
The population of beetles in the next three generations, considering the carrying capacity, is y1 = 130 beetles, y2 = 130 beetles, and y3 = 130 beetles.
The population of beetles can be calculated using the formula: y = y0 * (1 + r)^n, where y is the population at a given generation, y0 is the initial population, r is the intrinsic growth rate (expressed as a decimal), and n is the number of generations.
Given that the initial population (y0) is 60 beetles and the intrinsic growth rate (r) is 150% (or 1.5), we can calculate the population for the next three generations.
For the first generation (y1), we substitute y0 = 60, r = 1.5, and n = 1 into the formula: y1 = 60 * (1 + 1.5)^1 = 60 * 2.5 = 150 beetles.
For the second generation (y2), we substitute y0 = 60, r = 1.5, and n = 2 into the formula: y2 = 60 * (1 + 1.5)^2 = 60 * 6.25 = 375 beetles.
For the third generation (y3), we substitute y0 = 60, r = 1.5, and n = 3 into the formula: y3 = 60 * (1 + 1.5)^3 = 60 * 15.625 = 937.5 beetles.
However, since the environment can only sustain a maximum population of 130 beetles, we need to consider the carrying capacity.
To find the population at each generation while considering the carrying capacity, we compare the calculated population with the carrying capacity and use the smaller value as the population.
For y1, the population is 150 beetles, which exceeds the carrying capacity of 130 beetles. Therefore, y1 = 130 beetles.
For y2, the calculated population is 375 beetles, which is also above the carrying capacity. Thus, y2 = 130 beetles.
For y3, the calculated population is 937.5 beetles, which is still above the carrying capacity. Therefore, y3 = 130 beetles.
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