can humans cause disease-causing bacteria and viruses to change into a less harmful form using natural selection and evolution?
Answers
On a molecular level, the primary distinction between bacteria and viruses is that the former are non-living collections of chemicals that require a host to thrive, whilst the latter are free-living cells that may live within or outside a body.
One of the most powerful selecting factors that moulds the human genome is infectious diseases. Over the last 100,000 years, hazardous new infections have been introduced to communities due to migration and cultural changes. Infectious illness susceptibility is influenced by host genetics. According to a recent study, a virus-fighting protein in humans and other primates causes an explosion of genetic changes that may have accelerated the evolution of our species. According to their research, these genes shield the genome from adaptation (or the development of advantageous genes) so that they can survive longer in human populations and avoid being eliminated by purging.
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Related Questions
What does Greenberg identify as being a terrible problem, and how do we fix it?
Answers
To answer the question need to watch this video:
https://youtu.be/_jaWs87t5UM
Answer:
The correct answer is - A large amount of sea life is being taken from the ocean to feed other creatures.
Explanation:
In this video, Greenberg found out that there is a terrible problem as using fishing on a large scale causing harm to marine life and resulting in the extinction or endangering of species on large scale or taken from the ocean to feed other creatures.
To correct this he talks about the overfishing problems He talks about preventing people from overfishing so many fish do not have to face problems of extinction.
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Explain the role of density in the movement of deep currents.
A. Cold, high salinity (salty) deep current water is less dense than warm, low salinity
surface current water. As warm water sinks, cold water will move in to take its
place, creating a circular movement called a convection current.
B. Cold, high (salinity) deep current water is more dense than warm, low salinity
surface current water. As warm water rises, cold water will move in to take its
place, creating a circular movement called a convection current.
C. Warm, high salinity (salty) deep current water is more dense than warm, low
salinity surface current water. As warm water sinks, cold water will move in to
take its place, creating a circular movement called a convection current.
D. Warm, high salinity (salty) deep current water is less dense than warm, low
salinity surface current water. As warm water sinks, cold water will move in to
take its place, creating a circular movement called a convection current.
Answers
Answer:
You answer is A
Explanation:
A combination of high salinity and low temperature near the surface makes seawater dense enough to sink into the deep ocean. Hopefully this help if it didnt my bad
Seawater is sufficiently dense to sink into the deep ocean due to a combination of high salt and low temperature at the surface. Thus, option A is correct.
What is the role of density in the movement of deep currents?Less dense water floats on top of denser water. The deep ocean currents that travel around the globe are propelled by this theory.
Seawater is sufficiently dense to sink into the deep ocean and flow along the bottom of the basins due to a combination of high salinity and low temperature close to the surface.
A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.
Therefore, Cold, high salinity (salty) deep current water is less dense than warm, low salinity.
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the principle used to determine whether an allele is experiencing evolution is called the – law of equilibrium.
Answers
False. The principle used to determine whether an allele is experiencing evolution is not called the "law of equilibrium." The correct principle or concept is known as the Hardy-Weinberg equilibrium or the Hardy-Weinberg principle.
The Hardy-Weinberg equilibrium is a fundamental concept in population genetics that describes the equilibrium conditions for allele frequencies in a population under certain assumptions.
According to the Hardy-Weinberg principle, in the absence of evolutionary forces (such as mutation, migration, natural selection, genetic drift, and non-random mating), the frequencies of alleles and genotypes in a population will remain constant from generation to generation.
Deviations from the Hardy-Weinberg equilibrium indicate that evolutionary processes are occurring, such as changes in allele frequencies over time.
Therefore, it is important to understand and analyze deviations from the Hardy-Weinberg equilibrium to study the processes of evolution and population genetics.
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Eye color is controlled by one gene. There are two alleles for this gene:
Brown (B) and blue (b). The brown allele is dominant and blue allele is
recessive, however the brown allele is incompletely dominant over the
blue. A heterozygous individual has green eyes. What offspring could be
produced if two green eyed individuals mate?
Answers
Answer:
There are 16 possible genotypes and phenotypes that are listed in the punnett square. The ratio of phenotype is -
Brown : green : blue :: 12:3:1
Explanation:
plato
List out 3 caste of honey bees with their description
Answers
Answer:
There are three castes in honey bees:
dronesworkersqueens.Explanation:
There are three castes in honey bees:
Drones-Male honey bees are drones. The head and thorax of the drone are bigger than the females.Queens-Honey bee queens are the species' reproductive women.Workers-Workers' sweet bees are generally non-reproductive women.What is the coloured ink indicator? Can anyone explain me its function? i really need help
Answers
Answer:
Bioindicators are species, groups of species or biological communities whose presence, abundance and biological conditions, in real ecosystems or through the use of laboratory toxicity tests, to make inferences about the quality of the environment.
"If a consumer doesn’t consume any snails but does consume Big Macs, then his marginal rate of substitution between snails and Big Macs when his snail consumption is zero must be equal to the ratio of the price of snails to the price of Big Macs." Is this claim true, false or ambiguous? Justify your answer.
Answers
The claim oversimplifies the concept of MRS and assumes that the MRS between snails and Big Macs is solely determined by the price ratio, neglecting the complexity of individual preferences and other factors that may influence consumer choices. Therefore, the claim is ambiguous and cannot be definitively labeled as true or false.
The claim is ambiguous, and I will explain why.
The statement is based on the concept of the marginal rate of substitution (MRS), which measures the willingness of a consumer to give up one good in exchange for another while maintaining the same level of satisfaction. In this case, the claim suggests that the MRS between snails and Big Macs, when the consumer's snail consumption is zero, is equal to the ratio of the price of snails to the price of Big Macs.
However, without further information, it is difficult to determine the validity of the claim. The MRS typically depends on an individual's preferences and utility function, which can vary among consumers. It is not solely determined by prices.
Additionally, the claim assumes that the consumer has no preference for snails when their consumption is zero. This assumption might not hold true in practice. Preferences and choices can be complex, and a consumer's willingness to substitute between goods may not be solely determined by the prices of those goods. Other factors such as taste, health considerations, or cultural preferences can also influence the decision.
To summarize, the claim oversimplifies the concept of MRS and assumes that the MRS between snails and Big Macs is solely determined by the price ratio, neglecting the complexity of individual preferences and other factors that may influence consumer choices. Therefore, the claim is ambiguous and cannot be definitively labeled as true or false.
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what are adjuncts in beer making?group of answer choiceshopsmixture of broken down starch and solubilized protein in wortcereals like corn and rice added used to cut down cost and add flavornone of these
Answers
Adjuncts in beer making refer to cereals like corn and rice that are added to the brewing process, used to cut down costs and add flavor. They are not part of the traditional malted barley base but contribute to the overall profile of the beer.
Adjuncts in beer making refer to the cereals like corn and rice that are added to the wort (mixture of broken-down starch and solubilized protein) during the brewing process. These adjuncts are used to cut down the cost of beer production and also add flavor to the final product. The choice of adjuncts used in beer making is determined by the brewer's preferences and the style of beer being produced. The starch in the adjuncts is broken down into fermentable sugars during the mashing process, which is then converted into alcohol during fermentation. Overall, the use of adjuncts in beer making is a common practice that allows for greater variety and cost efficiency in the brewing industry.
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Please help with this true or false question about photosynthesis!!
Answers
The observation that the acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium channel and opens it is an example of a
Answers
The observation that acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium channel and opens it is an example of a ligand-gated ion channel.
Ligand-gated ion channels are a type of membrane protein that opens or closes in response to the binding of a specific molecule, known as a ligand. In this case, acetylcholine acts as the ligand that binds to the receptor site on the sodium channel.
When acetylcholine binds to the receptor, it induces a conformational change in the channel, allowing sodium ions to flow into the muscle cell. This influx of sodium ions contributes to the depolarization of the muscle cell membrane and the generation of an action potential, ultimately leading to muscle contraction.
The opening of the sodium channel in response to the binding of acetylcholine is a classic example of how ligand-gated ion channels mediate communication and signaling between neurons and target cells.
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(c) Oxygen passes from the alveolus into the blood.
Name the part of the blood that carries the most oxygen.
Answers
Answer:
Undoubtedly, Red Blood Cells are the ones carrying the most oxygen.
An organism that is asexual needs both a male and female to contribute genetic material to reproduce.
Question 7 options:
True
False
Answers
Answer:
false
Explanation:
A asexual organism can reproduce without another individual.
What is the probability of getting the same numbers on 3 dice when they are thrown simultaneously?
Answers
Answer:
So, assuming the dice are 'fair' (that each of the six numbers has a probability of 1/6 of showing up on each of the dice), there is a probability of 1/36 that all three dice will show the same number.
Explanation:
7 Eleven PESTLE analysis and SWOT analysis
Answers
Sure! Here is a PESTLE analysis and SWOT analysis for 7-Eleven:
PESTLE Analysis:
1. Political Factors: Government regulations and policies can affect 7-Eleven's operations, such as taxation, labor laws, and food safety regulations. Changes in political stability or shifts in government priorities can also impact the business.
2. Economic Factors: Economic conditions, including inflation, exchange rates, and consumer spending patterns, influence 7-Eleven's profitability and growth. Economic downturns or fluctuations in disposable income can affect customer behavior and purchasing power.
3. Sociocultural Factors: Cultural norms, consumer preferences, and social trends shape the demand for products and services offered by 7-Eleven. Factors such as changing lifestyles, dietary preferences, and demographics can impact the company's marketing strategies.
4. Technological Factors: Technological advancements, such as mobile applications, e-commerce, and automation, play a significant role in 7-Eleven's operations. Embracing technology can enhance efficiency, customer experience, and competitive advantage.
5. Legal Factors: Compliance with local and international laws and regulations is crucial for 7-Eleven. This includes laws related to employment, intellectual property, health and safety, and data protection, among others.
6. Environmental Factors: Growing concern for environmental sustainability and climate change impacts 7-Eleven's practices. Adapting to eco-friendly initiatives, reducing carbon footprint, and waste management are important considerations for the company.
SWOT Analysis:
Strengths:
1. Strong brand recognition and global presence.
2. Extensive store network and convenient locations.
3. Wide product range, including snacks, beverages, and ready-to-eat meals.
4. Emphasis on customer convenience and 24/7 operating hours.
5. Ability to adapt and introduce innovative offerings based on consumer trends.
Weaknesses:
1. Dependency on a limited product mix, primarily focused on convenience store items.
2. Vulnerability to competition from larger retail chains and online platforms.
3. Reliance on franchisees, which can impact consistency across stores.
4. Limited control over pricing due to competition and market dynamics.
5. Potential challenges in maintaining product quality and freshness.
Opportunities:
1. Expansion into emerging markets with growing urban populations.
2. Diversification into healthier food options and organic products.
3. Leveraging technology to enhance the customer experience, including mobile ordering and delivery services.
4. Partnerships with local suppliers for sourcing fresh and unique products.
5. Incorporating sustainability initiatives to appeal to environmentally conscious consumers.
Threats:
1. Intense competition from other convenience store chains and supermarkets.
2. Changing consumer preferences towards healthier alternatives and online shopping.
3. Economic uncertainties and fluctuations impacting consumer spending.
4. Increasing regulations and compliance requirements in different markets.
5. Potential disruptions in the supply chain and logistics operations.
It's important to note that the analysis provided here is a general overview and may not capture all specific factors relevant to 7-Eleven's situation. A comprehensive analysis would require a more in-depth examination of the company's internal and external environment.
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What do you think would happen to Darwin's theory if resources were unlimited?
Be happy!
Answers
Answer:
if the resources were unlimited, there would be no struggle for survival, and every living being would prosper.
Explanation:
What do viruses need to reproduce? A. they need genetic material B. They need bacteria C. They need a host cell D. They need insulin
Answers
Answer: C
The viruses trick your cells into making replicas of the virus, not blood cells. They inject their DNA into the cell, and the cell reproduces more viruses that do the same procedure.
Hope it helps!
why don’t we run out of the important gasses that we need to stay alive?
Answers
We don't run out of the important gases that we need to stay alive is because the gases are getting recycled in the environment.
The life on this planet is mainly based on 3 gases ie, carbon, hydrogen and oxygen. We know that CO2 is important for the plants uptake during the process of photosynthesis and releases O2 which is needed for the animals for living.
Animals uptake this O2 for respiration and releases CO2. Here we can see the cycle of exchange of gases. The carbon in the atmosphere combine with the hydrogen to form hydrocarbons which are helpful for the humans in so many ways.
Thus we will not run out of the gases as it is being used and recycled.
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The correct question is -
Why don't we run out of the important gases that we nee to stay alive?
What is meant by “concentration”? How can you increase the concentration of salt (electrolytes) in a solution of water? How can you decrease the concentration of electrolytes in a solution?
Answers
Answer:
The concentration of a substance is the quantity of solute present in a given quantity of solution.
images observed under the light microscope are reversed and inverted. explain what this means
Answers
Image viewed through the microscope is upside down and in reverse from the actual object or specimen.
The microscope produces an inverted and reversed image when observing objects. This means that the image viewed through the microscope is upside down and in reverse from the actual object or specimen.
The light microscope is an essential tool for scientific research as it provides magnification, which enables scientists to view objects at a cellular level. When light enters the microscope, it passes through the lenses that magnify and focus the light on the specimen. As light passes through the objective lens and forms an image, the image is reversed from right to left. It is also inverted from top to bottom. This means that what is seen through the microscope is upside down and in reverse.
However, microscopists learn to adapt to this and can quickly adjust their positioning and movement to account for this. Overall, understanding that images viewed under the light microscope are inverted and reversed helps researchers and students learn about the structure and function of microscopic organisms.
This is a crucial aspect of studying biology, as many living organisms can only be viewed through a microscope, and it's important to have an accurate understanding of what is being viewed.
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Type of democracy where citizens elect leaders to represent them in government dictatorship representative democracy oligarchy anarchy
Answers
Answer:
representative democracy
Explanation:
Democracy can be defined as a government of the people, by the people and for the people.
There are two (2) main types of democracy and these include;
I. Representative democracy: it's also known as indirect democracy and can be defined as a form of government which typically involves the process of having the citizens of a particular country vote to elect representatives (political leaders) to enact laws, create policies and make decisions on their behalf.
Hence, representative democracy is a type of democracy where citizens elect leaders to represent them in government.
II. Direct democracy: it can be defined as a process which typically involves the candidates voting for their preferred choice. Thus, their choices are reflected directly on the subject matter.
Generally, the type of government in which legislators such as senators or house of representative members are found is known as a democracy and they are saddled with the responsibility of enacting or making laws.
QUESTION 1 Exercise 11.10. Butterflies. Alice, Bob, and Charlotte are looking for butterflies. They look in three separate parts of a field, so that their probabilities of success do not affect each other. • Alice finds 1 butterfly with probability 17%, and otherwise does not find one • Bob finds 1 butterfly with probability 25%, and otherwise does not find one • Charlotte finds 1 butterfly with probability 45%, and otherwise does not find one Let X be the number of butterflies that they find altogether. Write X as the sum of three indicator random variables, X1, X2, X3 that indicate whether Alice, Bob, Charlotte (respectively) found a butterfly. Then X= X1+X2 +X3. Find the expected value of X by finding the expected value of the sum of the indicator random variables. Your answer will have two decimal places. **This is a straight forward expected value of a sum of random variables, nothing fancy here! QUESTION 2 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? O A. Example 11.10, sampling without replacement O B. Example 11.11, sampling with replacement QUESTION 3 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. What is the expected value of getting the first head? This will be an integer answer. QUESTION 4 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The next step is to find the expected value of getting the second head. Because this is identical to finding the expected number of rolls for the first head (independent events), we just multiply the first head's expected value by 2. This will be an integer answer. QUESTION 5 Exercise 11.17 (a). Waiting for favorite song. Michael puts his iTunes on shuffle mode where songs are not allowed to be replayed. He has 2,781 songs saved on iTunes, and exactly one of these is his favorite. How many songs is he expected to have to listen to until his very favorite song comes up? Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? A. Example 11.11, sampling with replacement B. Example 11.10, sampling without replacement
Answers
In Exercise 11.10, the expected value of the number of butterflies found by Alice, Bob, and Charlotte is obtained by finding the expected value of the sum of three indicator random variables.
In Exercise 11.16, the expected value of the number of flips needed to get the second head in a coin flipping experiment is determined. These exercises involve different scenarios of sampling with and without replacement.
In Exercise 11.10, the expected value of X, the total number of butterflies found, is found by calculating the expected value of each indicator random variable (X1, X2, X3) representing whether Alice, Bob, and Charlotte found a butterfly, respectively.
The expected value of each indicator variable can be obtained by multiplying the probability of success (finding a butterfly) by 1 and the probability of failure (not finding a butterfly) by 0. Then, the expected value of X is calculated as the sum of the expected values of the indicator variables.
In Exercise 11.16, the expected value of X, the number of flips needed to get the second head, is determined. To find this value, we first need to find the expected value of getting the first head. This scenario is similar to Example 11.11, which involves sampling with replacement.
Each coin flip is an independent event, and the probability of getting a head is constant at 0.5.
Therefore, the expected value of getting the first head is 1/p, where p is the probability of success (0.5 in this case).
In Exercise 11.17 (a), the scenario of waiting for a favorite song in Michael's iTunes playlist involves sampling without replacement. Each song played is not replayed, and there is only one favorite song among the total number of songs.
Therefore, this scenario is similar to Example 11.10, sampling without replacement.
To find the expected number of songs Michael needs to listen to until his favorite song comes up, the formula for sampling without replacement is used, which is the reciprocal of the probability of selecting the favorite song at each step.
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This table shows the codons found in messenger RNA. Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Phe-
Ser-Gln?
Answers
The sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Phe-Ser-Gln will be AAA, TGT, and GTC.
What are polypeptides?Polypeptides are macromolecules which are formed from chains of amino acids linked together by peptide bonds.
The amino acids in polypeptides are coded for in mRNA by a triplet of nucleotides known as codons.
mRNA is synthesized from a template DNA strand based on complementarity.
The codons that code for the given amino acids in an mRNA follow the genetic code and are as follows:
Phe = UUUSer = UCUGln = CAGIn DNA uracil is replaced by thymine.
Therefore, the sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Phe-Ser-Gln will be AAA, TGT, and GTC.
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The sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Phe-Ser-Gln is AAG, AGG, and GUU.
What are Nucleotides?Nucleotides may be defined as a molecule that consists of a nitrogen-containing base, a phosphate group, and a pentose sugar.
The codons that codes for the given amino acids are as follows:
Phe = UUCSer = UCCGln = CAA.Therefore, The sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Phe-Ser-Gln is AAG, AGG, and GUU.
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Some members of the Euglenids are photosynthetic, yet they will lose their photosynthetic pigment if left in the dark. True or False: After storing Euglenids in the dark, the loss of the photosynthetic pigment is permanent.
Answers
A) Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE
B )The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
What are EuglenasEuglenas are unicellular organisms belonging to the kingdom Protista, when kept in the dark for too long Euglenoids begin to lose their chlorophyll. As it loses its chlorophyll it becomes unable to produce its own food and starts consuming bacterias within its habitat.
The loss of chlorophyll in Euglenids can be regained after it is been exposed to sunlight and allowed to grow exponentially for several weeks.
Hence we can conclude that Some members of the Euglenoids lose their photosynthetic pigment when left in Dark : TRUE while The loss of photosynthetic pigment in Euglenids stored in the dark is permanent : False
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4. After a scientist publishes a paper, someone else finds evidence that the paper's hypothesis may not be
correct. The scientist is unhappy, but studies the new evidence anyway. The scientist is showing which
scientific attitude?
a creativity
b. curiosity
open-mindedness
d. skepticism
Answers
Answer:
C- open-mindedness
Explanation:
I say open-mindedness because an open minded type of person will accept advice although they may not agree and looks over to see maybe if there is something they may have missed. A curious person doesn't really fit his description in my opinion. Neither does a creativity type of attitude. Last, skepticism means you just basically are not about to even consider doubting yourself and you just know your right without a doubt. So, yes open mindedness is your answer from my pov (Point Of View)
In what year did camillo golgi find golgi bodies and what did he use and how did he use it? I need the answer quickly!!!!!!!!
Answers
Answer:
Camillo Golgi was an Italian scientist who discovered Golgi bodies in 1873. He used them as a landmark to describe cellular structure in the brain. They're composed of stacks of membranes, each one containing a set of proteins called Golgi apparatus proteins. This stack can extend from 1 to 10 micrometers thick
Answer: He established two types of malaria, tertian and quartan fevers caused by Plasmodium vivax and Plasmodium malaria respectively. In 1886, he discovered that malarial fever (paroxysm) was produced by the asexual stage in the human blood (called erythrocytic cycle, or Golgi cycle).
help help help help e help.
Answers
Answer:
True!
Explanation:
Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.
the type of protein-energy malnutrition characterized by sufficient intake of calories but a lack of protein in the diet is called
Answers
The type of protein-energy malnutrition characterized by sufficient intake of calories but a lack of protein in the diet is called Kwashiorkor.
Kwashiorkor is a form of malnutrition that is caused by a lack of protein in the diet, even though there may be an adequate intake of calories. It is most commonly seen in areas of the world where diets are heavily based on starchy staple foods such as rice, cassava, and corn, and where animal protein sources are limited or not available.
The symptoms of Kwashiorkor include swollen abdomen, edema, skin and hair changes, and an overall failure to grow or gain weight. Children are especially susceptible to the effects of Kwashiorkor, as their bodies are still developing and require adequate protein to support growth and development.
Treatment for Kwashiorkor involves addressing both the lack of protein and the underlying cause of the malnutrition. This may involve providing protein-rich foods, such as milk, eggs, or meat, as well as treating any infections or other health problems that may be contributing to the malnutrition. With appropriate treatment, most individuals with Kwashiorkor are able to recover and regain their health.
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An individual's ecological footprint is equivalent to:.
Answers
An individual's ecological footprint is equivalent to the: total amount of food consumed by that individual.
2. Which of the following is NOT one of the ways an epidemic can start?
A. an area's food or water gets infected
B a disease becomes more virulent
C. a disease is introduced to a new population
D. a medicine no longer works to fight a disease
Answers
Answer:
b
Explanation:
I'm pretty sure its b because virulent just means for it to get more harmful
NEED HELP!!!
In a certain species of plant, flowers can be purple or white. When a plant with white flowers (P 1) is crossed with a plant with purple flowers (P 2), all offspring have purple flowers (F 1).
a. Determine which trait is dominant and recessive, and prove it with a Punnett square.
b. Show a Punnet square for a cross that allows F 1 to self-pllinate.
Answers
Answer:on part A,the white trait is recessive,and the purple trait is Dominant.
Explanation: