A disease-causing homeostatic imbalance may exist. There are two main ways that toxicity or deficiency can lead to disease or cellular dysfunction.
How do breath and breathe differ from one another?We refer to inhaling and exhaling as "breathing" in our everyday speech. A whole breathing cycle is referred to as a breath in a noun. It also includes the air that is breathed in or out. Many meanings can be derived from both words.
How do you include breath into a sentence?Breath odor is a result of smoking. After exhaling deeply, he started to ascend the stairs. She slumped against the door, struggling for breath. With barely a breather, he spoke for one and a half hours.
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Question 7 of 10
Fossils of a species of bear are found in layer 5. Which layer is most likely to
have organisms that lived at the same time as the bear species?
8-
5
www
3
2-
A. Layer 8
B. Layer 2
C. Layer 1
13
Answer:
A is the answer ok
Explanation:
Layer 8 must be that
which of the following statements about the movement of substances through the cell membrane is true? group of answer choices water freely moves across cell membranes attracted by electrolytes water moves across the cell membranes only through protein channels. electrolytes freely move across cell membranes water and electrolytes cannot move across cell membranes
The statement "water moves across the cell membranes only through protein channels" is true.
The cell membrane is selectively permeable, meaning it only allows certain substances to pass through. Water is a small molecule and can pass through the cell membrane through protein channels called aquaporins. These channels allow water to move across the membrane quickly, while other molecules, such as electrolytes, need specialized channels or transporters to cross the membrane.
The movement of water through the membrane is also influenced by osmosis, which is the movement of water from an area of higher concentration to an area of lower concentration. Overall, the movement of substances through the cell membrane is tightly regulated to maintain the proper balance of molecules and ions inside and outside the cell.
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which of the following statements does not apply to autoimmune diseases? a. due to an autoantibody directed against an individual's own cells or tissue components b. inflammation usually responds to penicillin or other bacterial antibiotics. c. often treated by drugs that suppress the inflammatory reaction d. may result from autoantibodies formed against foreign antigens that cross-react with components in similar antigens possessed by the subject's own tissues
Autoimmune diseases do not apply option B: inflammation usually responds to penicillin or other bacterial antibiotics.
With autoimmune illnesses, your immune system attacks your body unintentionally. Rheumatoid arthritis, Crohn's disease, and a few thyroid diseases are examples of these types. The immune system typically defends against bacteria and viruses. As soon as it notices these foreign invaders, it immediately sends out an army of fighter cells to combat them.
Normally, the immune system can tell which cells are your own and which ones are not. When you have an autoimmune disease, your immune system mistakenly views a part of your body, such as your joints or skin, as foreign. Proteins produced by the body called autoantibodies attack healthy cells.
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Correct question is:
which of the following statements does not apply to autoimmune diseases?
a. due to an autoantibody directed against an individual's own cells or tissue components
b. inflammation usually responds to penicillin or other bacterial antibiotics.
c. often treated by drugs that suppress the inflammatory reaction
d. may result from autoantibodies formed against foreign antigens that cross-react with components in similar antigens possessed by the subject's own tissues
recall that the lymphatic system defends against infection and disease and returns tissue fluids to the bloodstream (as you saw in chapter 1: an introduction to anatomy and physiology). the tissue (interstitial) fluid that is transported by lymphatic vessels is called lymph. recall also that lymph is a fluid connective tissue. along the way to the cardiovascular system, lymph is monitored for signs of injury and infection. this recirculation of fluid is essential for homeostasis. what is the function of the cardiovascular system?
The function of the cardiovascular system is to circulate blood throughout the body, ensuring the delivery of oxygen, nutrients, and other essential substances to cells and tissues while removing waste products like carbon dioxide and toxins.
The heart is the central organ in this system, acting as a pump to generate pressure that propels blood through a vast network of blood vessels. These vessels include arteries, which carry oxygenated blood away from the heart, and veins, which return deoxygenated blood back to the heart. The blood itself is a connective tissue consisting of various cells and plasma, which transports nutrients, oxygen, hormones, and waste products.
In addition to its primary function of circulation, the cardiovascular system plays a vital role in maintaining homeostasis by regulating body temperature, distributing hormones, and providing immune support. The cardiovascular system also interacts closely with the lymphatic system, which helps maintain proper fluid balance in the body.
Overall, the cardiovascular system is crucial for maintaining life, supporting various physiological processes, and preserving homeostasis. It efficiently circulates blood to deliver essential substances and remove waste, while also providing immune support and temperature regulation.
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what occurs during the first gap phase (g1) of the cell cycle? group of answer choices separation of genetically identical daughter cells expression of regulatory proteins and enzymes required for replication replication of dna separation of replicated chromosomes so that each daughter cell gets the same complement of chromosomes
Expression of regulatory proteins and enzymes required for replication occurs during the first gap phase (G1) of the cell cycle .the correct option (1).
A cell's growth and division are accompanied by a sequence of processes known as a cell cycle. A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide. The cell then exits interphase, goes through mitosis, and finishes dividing.
What purpose does the cell cycle serve?The primary purpose of the cell cycle is to properly divide the enormous quantity of DNA found in the chromosomes into two daughter cells that are genetically identical.
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Full Question: What occurs during the first gap phase (G1) of the cell cycle?
expression of regulatory proteins and enzymes required for replicationseparation of genetically identical daughter cellsseparation of replicated chromosomes so that each daughter cell gets the same complement of chromosomesreplication of DNAcreate your hypothesis: you will investigate atmospheric conditions (temperature, humidity, and co2 levels). which stimuli will the fruit flies prefer and why?
Fruit flies will prefer environments with higher temperatures, higher humidity, and higher [tex]CO_{2}[/tex] levels, as these conditions are typically more favorable for their reproduction and survival.
The fruit flies are typically found in environments with high humidity, and higher [tex]CO_{2}[/tex] levels can be detrimental to their health and survival. To investigate this hypothesis, you can follow these steps:
1. Set up several experimental chambers with varying conditions of temperature, humidity, and [tex]CO_{2}[/tex] levels.
2. Introduce a group of fruit flies into each chamber.
3. Observe and record the behavior and preferences of the fruit flies in each chamber over a specific time period.
4. Compare the results and draw conclusions based on the data obtained to determine which atmospheric conditions the fruit flies prefer.
By conducting this experiment, you will be able to test your hypothesis and determine which atmospheric conditions are most preferred by fruit flies.
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which information is correct regarding the major pathophysiologic process of glomerulonephritis?
The major pathophysiologic process of glomerulonephritis is immune system damage to the glomeruli, which can lead to inflammation, proteinuria, hematuria, and kidney damage, the correct option is (a).
The damage to the glomeruli can be caused by various factors, such as infections, autoimmune disorders, and drug reactions. The immune system can produce antibodies that mistakenly target the glomeruli, triggering an immune response that damages the glomerular filtration membrane.
This can cause protein and red blood cells to leak into the urine, leading to proteinuria and hematuria. In some cases, glomerulonephritis can progress to chronic kidney disease and end-stage renal disease if left untreated, the correct option is (a).
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The complete question is:
Which information is correct regarding the major pathophysiologic process of glomerulonephritis?
a. Immune system damage to glomeruli
b. Infection of the renal tubules
c. Accumulation of toxins in the renal interstitium
d. Obstruction of the renal collecting ducts
9) What is the distance between the particles in compression ? d) zero a) least b) more c) mediumpp
In compression, the distance between particles generally becomes smaller, so the correct answer would be (a) "least."
What is compression?Compression refers to the process of applying pressure or force to a material, resulting in a decrease in volume. When particles in a material are compressed, they move closer together, which reduces the distance between them.
The amount of compression and the resulting decrease in distance between particles will depend on factors such as the nature of the material being compressed and the amount of pressure being applied.
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some tentative patterns that are emerging from the study of complex traits are that: select all that apply. genes involved in complex traits can show pleiotropy or epistasis, and most have major effects. most genes affecting complex traits have minor effects; few have major effects. many genes involved in complex traits show epistasis. genes involved in complex traits usually show pleiotropy or epistasis. many genes involved in complex traits are pleiotropic.
Genes involved in complex traits can show pleiotropy or epistasis. Pleiotropy is the ability of a single gene to have multiple effects on an individual's phenotype.
Epistasis is the interaction of multiple genes to control a single phenotype.Most genes affecting complex traits have minor effects; few have major effects. This means that many genes that contribute to complex traits have small effects, while only a few have major effects.Many genes involved in complex traits are pleiotropic.
This means that these genes have multiple effects on an individual's phenotype. Therefore, the options you should select for this question are genes involved in complex traits can show pleiotropy or epistasis, most genes affecting complex traits have minor effects; few have major effects, and many genes involved in complex traits are pleiotropic.
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the enzyme called phosphodiesterase hydrolyzes camp into amp. researchers have identified an e. coli strain in which this phosphodiesterase works 10-times faster than a normal e. coli strain. how would this overactive phosphodiesterase affect diauxic growth?
Diaauxic growth would increase if phosphodiesterase was operating ten times more quickly than a typical E. coli strain. Because cAMP is being converted into AMP, it would rise.
Escherichia coli grows diauxically in media containing lactose, glucose, and glucose at a concentration insufficient to support complete growth. It was discovered that a mutation in the CR gene, which controls catabolite suppression unique to the lac operon, relieves glucose-lactose diauxie but not glucose-maltose diauxie.
Two sugars on a culture growth medium, one of which is simpler for the target bacterium to metabolise, result in diauxic growth, or double growth. First, the chosen sugar is ingested, resulting in fast development, then a lag phase.
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when researchers stimulated the during laboratory experimentation, eating behaviors were inhibited. please choose the correct answer from the following choices, and then select the submit answer button. answer choices lateral hypothalamus ventromedial hypothalamus lateral hippocampus ventromedial hippocampus
In a lab experiment, eating behaviors were suppressed when the ventromedial hypothalamus was activated. The solution is Option B.
The hypothalamic ventromedial nucleus (VMN, VMH, or ventromedial hypothalamus) is a nucleus that controls sexual activity, fear, appetite, and temperature regulation. It's referred to as a "satiety center". Another area of the brain thought to regulate eating is the lateral hypothalamus.
Scientists have discovered that stimulating electrodes placed in an animal's lateral hypothalamus will alter the animal's eating habits. The circuit, which is located in the "bed nucleus of the stria terminalis" (BNST), influences eating by suppressing activity in the lateral hypothalamus, a part of the brain that is known to regulate eating.
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Correct question is:
when researchers stimulated the during laboratory experimentation, eating behaviors were inhibited.
please choose the correct answer from the following choices, and then select the submit answer button. answer choices
lateral hypothalamus
ventromedial hypothalamus
lateral hippocampus
ventromedial hippocampus
calculate the expected na / k atpase activity (units/sec) in pkd cells treated with 10^6 pm ouabain.
The expected Na⁺/K⁺ ATPase activity in PKD cells treated with 10⁶ pm ouabain would depend on various factors, including the baseline Na⁺/K⁺ ATPase activity in PKD cells, the concentration of ouabain used, and the duration of treatment.
The Na⁺/K⁺ ATPase is a transmembrane protein that plays a critical role in maintaining the electrochemical gradient across cell membranes. It is responsible for pumping three sodium ions (Na⁺) out of the cell for every two potassium ions (K⁺) pumped into the cell, using ATP as an energy source. This process is essential for many physiological functions, including the regulation of cell volume, the transmission of nerve impulses, and the maintenance of ion balance.
Ouabain is a cardiac glycoside that inhibits Na⁺/K⁺ ATPase activity. At low concentrations, ouabain can stimulate Na⁺/K⁺ ATPase activity, but at high concentrations, it inhibits the enzyme irreversibly.
The baseline Na⁺/K⁺ ATPase activity in PKD cells, the dosage of ouabain, and the length of the therapy are all variables that will affect the predicted Na⁺/K⁺ ATPase activity in PKD cells treated with 10⁶ pm ouabain.
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Use the terms system and subsystem to describe how specialized cells, xylem, phloem, vascular bundles, the stem, and leaves work together in a celery plant.
The xylem subsystem is responsible for transporting water and minerals from the roots up to the leaves, while the phloem subsystem is responsible for transporting the products of photosynthesis, such as sugars, from the leaves down to the rest of the plant. The vascular bundles within the stem of the celery plant contain both xylem and phloem tissues, which work together to ensure that the plant receives the nutrients it needs to grow and thrive.
What are specialized cells?The specialized xylem and phloem cells in a celery plant collaborate as parts of the plant's overall structure. For the leaves and the remainder of the plant, the stem serves as a support structure and connector.
It gives the xylem and phloem components a route to move water, nutrients, and sugars throughout the plant. It also aids in supporting the leaves so they are facing the sun so they can perform photosynthesis.
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b. what type of media did you use (name and type, e.g. macconkey (not used here) which is selective and differential) and what components within this media helped select for these coliforms? (1 pt)
One of the most commonly used media for selecting for coliforms is the MacConkey agar, which is a selective and differential media.
The selective agents in the media inhibit the growth of non-coliform bacteria, while allowing the growth of gram-negative bacteria, including coliforms. The differential agents in the media, such as lactose, differentiate between coliforms based on their ability to ferment lactose.
The lactose-fermenting coliforms produce acid, which turns the media red/pink and indicates their presence. Non-lactose fermenting bacteria produce no color change, making it easy to distinguish between the two. Other media that may be used to select for coliforms include Eosin Methylene Blue agar (EMB) and Levine Eosin Methylene Blue agar (L-EMB), which are also selective and differential media.
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suppose an f1 male of genotype xw p[w ]/y; cy/cy ; sb/sb (carrying the transgene on his x chromosome) was mated to a tester female of genotype xw/xw; cy /cy ; sb /sb that lacked the transgene. considering all possible sperm that the f1 male can produce (and there are no crossovers in meiosis), what proportion of all f2 offspring should be white-eyed, stubble bristle males?
The total F2 offspring that will be white-eyed, stubble bristle male is around 25% or ¼th of the population.
The proportion of white-eyed, stubble-bristle males in the F2 offspring is 25%. This is because the F1 male carries the transgene on his X chromosome, and all of his sperm will carry either the wild-type or the transgenic X chromosome.
Each sperm has an equal chance of combining with either the X chromosome from the tester female that carries the p[w] allele or the X chromosome that lacks the p[w] allele. The probability of an XwY; cy/cy; sb/sb offspring is 1/4, so 25% of all F2 offspring will be white-eyed, stubble-bristle males.
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what is different generation time of e.coli and pseudomonas aeruginosa and lactobacillus, nitrobacter
E. coli has the shortest generation time, followed by P. aeruginosa, Lactobacillus, and Nitrobacter, respectively. The generation time of these bacteria can vary depending on the environmental conditions, which can affect their growth rate and ability to reproduce.
The generation time is the time required for a population of organisms to double in number. The generation time varies between different species of bacteria, and it can also depend on environmental factors such as temperature, nutrient availability, and pH.
Escherichia coli (E. coli) is a fast-growing bacterium that can double in number in as little as 20 minutes under ideal laboratory conditions. This rapid generation time is one of the reasons why E. coli is commonly used as a model organism in microbiology and genetic research.
Pseudomonas aeruginosa, on the other hand, has a slower generation time of around 1-3 hours, depending on the environmental conditions. This bacterium is known for its ability to adapt to a wide range of environments and can survive in harsh conditions such as soil, water, and human tissues.
Lactobacillus is a group of bacteria commonly found in the human gut and fermented foods such as yogurt and kefir. These bacteria have a slower generation time compared to E. coli, with a range of 30 minutes to several hours, depending on the species and environmental conditions.
Nitrobacter is a genus of bacteria that plays an important role in the nitrogen cycle by converting nitrite to nitrate in soil and water. This bacterium has a relatively slow generation time compared to E. coli and P. aeruginosa, ranging from 8-10 hours under ideal conditions.
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1. In the islands, scientists have observed fish-eating snakes! These snakes
slither into the shallows of the ocean and catch small fish. Give two reasons
why this adaptation might occur:
Answer: Firstly due to smaller in numbers they have no impact over larger fish species. Secondly due to non availability of their favourable environment they are unable to adapt easily
Explanation:
true or false: the life cycle of protists can include a change in the number of copies of organismal dna.
Yes, Protists primarily reproduce during their life span through binary fission. The DNA molecule splits into two during binary fission, creating two DNA strands.
The given statement is true.
Protist life cycles can be extremely complex, containing asexual and sexual phases, encystment and excystment, and—in the case of many symbiotic and parasitic forms—an alternation of hosts, or they can be comparatively simple, involving only periodic binary fissions.
Animals also use the technique of some protists being unicellular in the haploid form and multicellular in the diploid form. Other protists use a technique known as alternation of generations, which is also used by plants, to produce multicellular stages in both haploid and diploid types.
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do root hairs appear to significantly increase the volume or the surface area of a root? what benefit does this increase provide for the plant?
Root hairs do not significantly increase the volume of a root, but they greatly increase its surface area. This increase provides the plant with a greater capacity for absorbing water and nutrients from the soil.
The surface area of a root is considerably increased by root hairs, and this boosts the plant's capacity to absorb water and nutrients from the soil. Although root hairs do not significantly increase the root's volume, they do significantly expand its surface area. Long, thin projections of root cells that stick out into the soil are called "root hairs." They significantly expand the root system's surface area, which improves the plant's ability to absorb water and nutrients. When compared to the surface area of the root, the surface area of the root hairs might be 10 to 100 times larger.
Plants benefit from the increase in surface area offered by root hairs in a number of ways. The ability to better absorb water and nutrients from the soil, which are crucial for plant growth and development, is the first benefit. Moreover, it aids in the plant's establishment of a more solid root system in the soil, which is necessary for stability and support. Last but not least, it enables the interchange of gases between the plant and the soil, which is necessary for respiration and other metabolic processes.
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What aspect of Mundra’s culture is revealed in Paragraph 8 of the story?
Young people are encouraged to make their own choices about marriage.
After the wedding, newly married couples usually live with the bride’s family.
Once a person marries into a family, he or she becomes family for life.
It is customary for people from the same social class to marry.
Answer:
It is customary for people from the same social class to marry.
what does the phenomenology of edmund husserl want to accomplish: the phenomenological idea of laying a ground
The phenomenology of Edmund Husserl aims to accomplish a rigorous and systematic study of conscious experience. By focusing on the phenomenological idea of laying a ground, Husserl sought to establish a solid foundation for understanding human experience and knowledge.
This foundation is built upon the concept of "bracketing" or suspending one's preconceived beliefs and judgments about the external world. This method, known as the phenomenological reduction, allows the observer to examine the essence of experiences directly, without interference from any presuppositions.
Husserl's phenomenology emphasizes the importance of intentionality, the idea that all conscious experiences are directed towards objects or phenomena. By analyzing intentionality, phenomenologists can explore the structure and meaning of various experiences in a detailed and systematic way.
In essence, the phenomenological idea of laying a ground serves as the starting point for a more accurate and comprehensive understanding of human consciousness. This approach seeks to describe and analyze the essential structures of experiences while remaining neutral and unbiased.
Ultimately, Husserl's phenomenology aims to provide a reliable framework for studying the nature of human experience, cognition, and the formation of knowledge, bridging the gap between subjective experiences and objective reality.
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studies have been done on monozygotic twins that were separated soon after birth and raised in separate homes, often in different parts of the country. many of these twins did not know that they had a twin until after they reached adulthood. for certain traits, concordance values were found to be similar in these twins to those of monozygotic twins raised together. what can be concluded about these traits?
Monozygotic twins raised independently showed high concordance values for a few variables, indicating that these traits are highly heritable and likely impacted more by genetics than environmental influences.
The proportion of twin pairs when both twins share the same feature or disease is known as concordance. Dizygotic (fraternal) twins typically share 50% of their genetic material, compared to 100% shared by monozygotic (identical) twins. Researchers can ascertain the relative contributions of genetics and environment to the development of a specific characteristic by contrasting the concordance values of monozygotic twins reared together with those of monozygotic twins grown separately.
Given that the twins were reared in different contexts yet still showed high levels of trait similarity, if the concordance values are similar between the two groups of twins, it is likely that genetics played a significant influence in the formation of the characteristic. The concordance values, on the other hand, indicate that environmental influences have a bigger impact on the development of the characteristic if they are significantly different.
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what is the difference between cells that are multipotent, cells that are totipotent and cells that are pluripotent?
In general, stem cells are classified as pluripotent (generate a large number of cells within a single lineage), multipotent (generate all types of adult cells) and totipotent (generate all embryonic and adult lineages).
Embryonic stem cells are considered pluripotent because they are capable of differentiating into any type of somatic cell. Adult stem cells and cord blood stem cells are classified as pluripotent cells because they have the ability to differentiate into a variety of cell types, but not as many as pluripotent cells.
Pluripotency is the ability of a cell to develop into any form of somatic cell. Only the ability of totipotent cells to generate placenta and embryos distinguishes them from pluripotent cells.
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PLEASEEEEE
EMERGENCY
Its a bio thing.
I need this real fast please.
The b of the unique Unigriffin are derived from the transcription o the DNA to mRNA and the translation of the mRNA to protein.
What are the unique traits of the Unigriffin?The unique traits are determined as follows:
DNA: | CAG TCG TTT | ATG GGG CTT CTT TTT | GAG AAT TCA CGC |
mRNA: | GUC AGC AAA | AUG GGG CUU CUU UUU | GAG AAU UCA CGC |
amino acids: | Val - Ser - Lys | Met - Gly - Leu - Leu - Phe | Glu - Asn - Ser - Arg |
Traits: The DNA sequence provided specifies the following traits
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the enhancers that are present near a gene are present in every cell in an organism, yet these enhancers can have tissue-specific effects on gene expression. how could enhancers have tissue-specific effects on gene expression?
Enhancers can have tissue-specific effects on gene expression because of the presence of transcription factors, co-activators, and repressors that are responsible for determining the specificity of the enhancer.
This can be explained as follows: Enhancers are regulatory sequences that are present near a gene and can activate or repress the transcription of the gene depending on their interaction with the transcriptional machinery. The specificity of the enhancer is determined by the transcription factors that bind to it, which are often specific to certain cell types or tissues. These transcription factors can be activated by extracellular signals that are unique to a specific tissue, such as hormones, growth factors or other signaling molecules.
When these transcription factors bind to the enhancer, they recruit co-activators or repressors that are responsible for modulating the expression of the gene. The combination of the transcription factors, co-activators, and repressors that are present in a particular cell type or tissue determines the specificity of the enhancer and the resulting pattern of gene expression. This explains why enhancers that are present near a gene are present in every cell in an organism, yet these enhancers can have tissue-specific effects on gene expression.
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(c) The estimated surface area of the lung system of a new-born baby is 4.2 m²; this is around one twentieth of the overall surface area of a typical adult's lungs. Calculate the overall surface area of a typical adult's lungs.
Answer: 84 m²
Explanation: The estimated surface area of the lung system of a newborn baby is given=4.2m²
size of a typical adult's lungs is 1/20th of a baby's lungs size,
so the lungs of a typical adult are:
1/20x4.2m²=84m²
What are examples of environmental pressues choose more than one answer
a man is brought to the hospital suffering from nausea, vomiting, and severe stomach cramps. he had recently returned from a hiking trip in northern minnesota. a sample taken from the man shows a single-celled flagellate organism that lacks mitochondria but has two nuclei. this organism is a(n)
The organism is likely to be a Giardia lamblia, which is a parasitic flagellate protozoan that lacks mitochondria but has two nuclei.
It is commonly found in untreated water sources and can cause gastrointestinal symptoms such as nausea, vomiting, and diarrhea when ingested by humans. It is often associated with hikers and campers who drink untreated water from streams or lakes. Treatment usually involves antiparasitic medication.
Giardia lamblia is a flagellated protozoan parasite that causes the intestinal infection giardiasis. It is commonly found in contaminated water sources, particularly in areas with poor sanitation or sewage treatment. The organism has two nuclei and lacks mitochondria, which are characteristic features of this species.
Symptoms of giardiasis can include diarrhea, stomach cramps, bloating, and nausea. The infection can be treated with antibiotics or antiparasitic drugs, although in some cases, the infection may resolve on its own.
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haemophilia is a recessive, sex-linked genetic disorder that has been observed at high frequencies in certain royal families where royal family members sometimes married and produced offspring with somewhat close relatives (first-cousins, second-cousins, etc.). what two terms that we talked about contributed to this proportional increase in what is typically a rare genetic disease?
The two terms that contributed to the proportional increase in hemophilia in certain royal families are "recessive" and "inbreeding."
Being a recessive genetic disorder, hemophilia requires two copies of the defective gene to manifest in a person (one from each parent). Inbreeding, or the act of mating closely related people, raises the possibility that both parents have a gene that has been altered. This raises the possibility that their offspring may acquire two copies of the altered gene and become afflicted with the disorder.
Marriages between close relatives (such as first- or second-cousins, etc.) were frequent in several royal houses, which raised the risk of receiving two copies of the hemophilia gene and developing the condition. This helped explain why hemophilia was more common in these families than it would have been in the general community, since it is a rather uncommon hereditary condition.
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if griffith had injected a fifth group of mice with a combination of heat-killed rough strain and heat-killed smooth strain, would the mice have died?
No, since mice cannot contract the heat-killed rough strain of bacteria. In the pivotal experiment, Frederick Griffith (1928) combined live R and S that had been destroyed by heat; he then injected the mixture into mice; the animals perished.
The tissues of the dead mouse were found to contain S-like smooth-coated living bacteria. While mice injected with the R strain did not pass away, animals injected with the S strain did within a few days of injection. Griffith proved through a series of tests that heating the bacteria rendered the S strain less virulent. Griffith put live, non-lethal germs into the mice along with his heat-killed, disease-causing microorganisms. The mice got pneumonia and passed away.
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