Answers
Clostridium perfringens is the organism that can infect deeper wound sites and produce exotoxins, enzymes, and gas that cause tissue and muscle necrosis (Option A).
What is Clostridium perfringens?Clostridium perfringens or C. perfringens is a microorganism that represents the most common reason for food contamination poisoning, which is a harmful gram-positive bacteria belonging to the clostridium genus.
Therefore, with this data, we can see that Clostridium perfringens or C. perfringens is a pahtogenic bacteria associated with the contamination of foods, which belongs to the clostridium genus and may be identified because it is gram-positive.
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Related Questions
Match the materials below to the BEST option describing their place in the cycles of photosynthesis and cellular respiration.
Some options may be used more than once or not at all.
Answers
Which piece of laboratory equipment would a student use if he wanted to view a living
specimen?
(1 Point)
O Compound light microscope
Scanning electron microscope
O Transmission electron microscope
Centrifuge
Answers
Answer:
Compound light microscope
Explanation:
since the organism has to be dead in order to be viewed under the electron microscope.
The centrifuge separates substances of different densities
The student measured the width of 5 different palisade cells at a total magnification of
X400
Eyepiece lenses are usually x5 or x10 magnification.
What combination of eyepiece and objective lenses would give a total magnification
of 400?
Eyepiece lens
Objective lens
(1)
Answers
Answer:
Eyepiece lens: 10x
Objective lens: 40x
Total magnification: 400x
Explanation:
In microscopy, magnification is defined as the degree of visual enlargement of the final image observed by the user. This value is measured by multiples, i.e., by comparing the real size of the image and the final virtual image formed by the microscope lenses. For example, a 10x magnification indicates that the virtual image has been enlarged to 10 times its original size. The total magnification can easily be calculated by multiplying the magnification of the objective lens (generally 4x, 10x or 40x) by the magnification of the eyepiece lens, usually 10x.
5. What was Darwin's theory of evolution?
Answers
Answer:
Natural selection or "survival of the fittest"
Explanation:
Creatures that adapt to survive changes will live to reproduce, while the creatures that do not adapt will die out.
Darwin states that evolution happens to natural selection, which is the concept that creatures tend to adapt to their environment.
Two hydrogen isotopes combine to form a helium atom and a great deal of energy. What process is being described?
Group of answer choices
Nuclear fission
Sublimation
Nuclear fusion
Conduction
Answers
Answer:
Nuclear Fusion
Explanation:
why is it important to determine the manner/mechanism of death
Answers
How would transcription be affected if a gene that needed to be expressed was missing its promotor?
Answers
Answer:
it can't be used to make a protein in that cell.
Explanation:
If a gene is not transcribed in a cell, it can't be used to make a protein in that cell. If a gene does get transcribed, it is likely going to be used to make a protein (expressed). In general, the more a gene is transcribed, the more protein that will be made.
The transcription is affected as when the gene has not been transcribed the protein will not make. When a gene is transcribed, protein synthesis can happen.
What is gene transcription?Gene expression begins with transcription. To create an RNA molecule, the DNA sequence of a gene must be copied. RNA polymerases, which join nucleotides to create an RNA strand, carry out transcription (using a DNA strand as a template).
A gene cannot be used to produce a protein in a cell if it is not transcribed there. If a gene gets transcribed, it will probably be used to produce a protein (expressed). In general, more protein will be produced the more a gene is transcribed.
Therefore, the transcription is impacted since the protein cannot be produced if the gene is not transcribed. Protein synthesis can take place when a gene is transcribed.
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If the DNA sequence is CCAATTGA, what is the compliment?
Answers
GGTTAACT is the complement of DNA sequence CCAATTGA.
What is a complement sequence of DNA?A sequence of bases in a nucleic acid called a complementary sequence can be used to match base pairs to create a double-stranded structure. For instance, G-T-A-C is the complementary sequence to C-A-T-G, where each letter represents a different DNA nucleotide.
Every DNA sequence has a counterpart sequence running in parallel since DNA has two strands. Adenine (A) is always coupled with Thymine (T) in the complementary sequence, while Cytosine (C) is always paired with Guanine (G).
Natural complementary DNA plays a crucial role in the production of new DNA copies and has emerged as a key experimental tool. The two strands of DNA are unraveled from one another during replication. Each strand is replicated twice, one by a DNA polymerase molecule that runs the length of each strand.
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How many base pairs long are the E.coli o157:h7 dna fragments that were seperated out on gel
Answers
If this experiment was repeated and the entire set up was placed in a dark closet, predict what would happen to each of the organisms in the jar use your knowledge of photosynthesis and respiration to justify your answer
Answers
The plant would stop photosynthesis due to the lack of light in the dim closet. Chlorophyll and other colors would be lost, and it would turn white. It would eventually exhaust the energy reserves in the roots and stem and perish.
What about photosynthesis?Photosynthesis is the process through which plants turn carbon dioxide, water, and sunlight into oxygen and sugar-based energy.More than just the essential necessities of water and sunlight are needed for growth. The five key factors that influence how well your plants or crops develop are light, carbon dioxide, water, soil organisms, and nutrients.Photosynthesis is primarily used to convert solar energy into chemical energy, which is then stored for use at a later time.This mechanism primarily provides energy to the planet's life systems.This indicates that without energy, it cannot happen (from the Sun). Chlorophyll, a green pigment found in leaves, absorbs the needed light. Chloroplasts, which contain chlorophyll, are present in the palisade and spongy mesophyll cells of plants.Learn more about photosynthesis here:
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Tall is dominant to short among pea plants. Choose appropriate symbols for these two traits and using these symbols write out a cross between true-breeding tall plants and true-breeding short plants. Be sure to include a legend and indicate what percentage of the offspring would be expected to show a given trait.
a. If the offspring were allowed to self- fertilize, what phenotypes and genotypes would be expected among the offspring and in what proportion? Using the symbols selected in the original problem, write out this cross and the resulting offspring. Please use Punnett square for this problem.
b. If the offspring were mated to true-breeding short plants, what phenotypes and genotypes would be expected among the offspring and in what proportion? Using the symbols selected in the original problem, write out this cross and the resulting offspring. What is this kind of cross called?
c. If the offspring were mated to true-breeding tall plants what phenotypes and genotypes would be expected among the offspring and in what proportion? Using the symbols selected in the original problem write out this cross and the resulting offspring.
Answers
Answer:
See the answer below
Explanation:
Let the tallness be represented by T and the shortness by t.
True-breeding tall plant = TT
True-breeding short plant = tt
TT x tt
Tt Tt Tt TT
Genotypic ratio of offspring: 100% Tt
Phenotypic ratio of offspring: 100% tall (see the first attached image for the Punnet's square analysis)
(a) See the second attached image for the Punnet's square analysis.
Tt x Tt
TT Tt Tt tt
Expected genotypes
1/4 TT 1/2 Tt 1/4 ttExpected phenotypes
Tall - 75%Short - 25%(b) Tt x tt
Tt Tt tt tt
Expected genotypes
1/2 Tt1/2 ttExpected phenotypes
Tall - 50%Short - 50%The kind of cross if referred to as test crossing.
(c) Tt x TT
TT TT Tt Tt
Expected genotypes
1/2 TT1/2 TtExpected phenotypes
Tall - 100%
g If you look carefully at this organism, you will not see any organs for gathering oxygen or releasing carbon dioxide or ammonia. There is no circulatory system. How does this animal perform these functions
Answers
Answer:
Simple unicellular organisms like Amoeba and some multicellular organisms like Hydra use their cell surface and skin for gaseous exchange with their environment.
Note: The organism in the question was not stated.
Explanation:
The complexity of an animal determines its metabolic needs, and hence, its requirement for specialized structures and functions.
Simple unicellular organisms are able to meet their metabolic needs such as gaseous exchange by simple diffusion through their cell surfaces. Such organisms include amoeba, paramecium, etc.
Some multicellular organisms lack specialized organs for nutrient transport and gaseous exchange such as hearts and blood vessels, etc. Example of such organisms are Hydra and Planaria. They have their cell surfaces in contact with the external environment, and thus use their skin for gaseous exchange by means of diffusion.
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
Answers
Answer:
Yes this is correct there has to be the same amount of energy in a chemical reaction before during and after the reaction. While the energy states may change from potential energy to heat energy to expended energy there is still the same amount of energy.
Explanation:
The energy before and after any chemical reaction must remain the same.
What is the law of conservation of energy?The principle of the conservation of energy states that energy can not be created nor destroyed nor destroyed. This is a key principle in the conservation of energy.
Hnece, this principle implies that the energy before and after any chemical reaction must remain the same.
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Which of the following is NOT true of Fungi?
A: Includes molds, mushrooms, and yeasts.
B: Fungi have cell walls made of chitin.
C: Fungi are a kingdom in the domain Protista
D: Most fungi are multicellular.
Answers
Fungi is a separate kingdom which include all the species such as molds, mushrooms, and yeasts. Fungi have a cell wall which is made up of chitin. Most of the fungi are multicellular. Thus, the correct option is C.
What are Fungi?Fungi is a separate kingdom of the five kingdom classification. A fungus is any member of the eukaryotic organisms which includes microorganisms such as yeasts and molds, as well as the mushrooms.
Fungi are the eukaryotic, non-vascular, non-motile, and heterotrophic organisms. Fungi may be unicellular or filamentous. Fungi reproduce through the means of spore formation. Fungi exhibit the phenomenon of alternation of generation. Fungi lack chlorophyll pigment and hence cannot perform photosynthesis like plants.
Therefore, the correct option is C.
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What force is jumping on a trampoline a push or a pull
Answers
Answer:A push
Explanation: If you jump on a trampoline it pushes you back up into the air.
A bacterium called Salmonella can cause
food poisoning.which kingdom is it in?
Answers
Answer:
monera kingdom
Explanation:
Answer:
The kingdom is Monera Kingdom
Explanation:
Please explain I’d really appreciate it:)
Answers
Answer:
answer is A, Bringing in more people to make a product
Explanation:
Because bringing more people to make a product won’t help because you’ll just make more and more stuff and you won’t have any sales so what’s the point of that. Same thing goes for providing more and better tools
2. What would happen to a house if its upright beams were not strong and sturdy? Compare that to what would happen in the human body if upright bones were not strong and sturdy.
Answers
Answer:
If our upright bones were not strong and sturdy then we will be very weak to do work and to do small work also our body didn't support us and we will be always afraid of our body
As a Consumer scientist, you have been invited by your community leaders to educate people at a community forum on “diet practices and appropriate lifestyle modifications that promote healthy living”; Briefly discuss any five of such practices using relevant examples
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Some diets and lifestyles that promote healthy living include:
Reduce Your WeightRestrict sugary beverages, drink plenty of water to stay hydrated, and so forth.Engage in Regular Physical Activity and Workouts.Be sure to get enough rest.Drink in moderation and keep yourself sober.What are some diet practices and appropriate lifestyle modifications that promote healthy living?A diet that includes a variety of foods, such as vegetables, fruits, low-fat dairy products, lean meats and other sources of protein, and whole grains promotes healthy living.
Some diets and lifestyles that promote healthy living include:
Take Multivitamin Supplements,Consume Healthier Meals, Limit Unhealthy Foods,Measure Your WeightRestrict sugary beverages, drink plenty of water to stay hydrated, and so forth.Minimize Sitting and Screen Time,Engage in Regular Physical Activity and Workouts.Be sure to get enough rest.Drink in moderation and keep yourself sober.Learn more about healthy living at: https://brainly.com/question/29591292
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What is TRUE about birth rate trends in the United States?
A.
The birth rate has had a steady increase since 2007.
The birth rate has been on a steady decline since 2007.
The birth rate has not changed since 2007.
OD. The birth rate has not been calculated since 2007.
B.
C.
Answers
Answer:
The birth rate has been on a steady decline since 2007
Explanation:
Label the components of skeletal muscle tissue. Not all will be used.
Answers
Answer: skeletal muscle fibers , cardiac and smooth muscle fibre
Explanation: muscle tissue consists of fibers of muscle cells connected together in sheets and fibers.
Skeletal muscle is attached to bones and its contraction makes possible locomotion, facial expressions, posture, and other voluntary movements of the body.
Cardiac muscle forms the contractile walls of the heart. cardiomyocytes are single cells with a single centrally located nucleus.A principal characteristic of cardiomyocytes is that they contract on their own intrinsic rhythm without external stimulation. Cardiomyocytes attach to one another with specialized cell junctions called intercalated discs.
Smooth muscle tissue contraction is responsible for involuntary movements in the internal organs. It forms the contractile component of the digestive, urinary, and reproductive systems as well as the airways and blood vessels.
compare systems for digestion in an amoeba to those in a mouse.
Answers
The digestive system in an amoeba is a single-celled process, while in a mouse, it involves a complex system of organs and specialized tissues for mechanical and chemical breakdown of food.
An amoeba ingests food via phagocytosis, in which the cell membrane engulfs the food particle and forms a food vacuole. Enzymes are then secreted into the vacuole to break down the food. In contrast, a mouse ingests food through the mouth, where it is mechanically broken down by teeth and saliva, and then chemically broken down in the stomach and small intestine through the secretion of digestive enzymes.
The main difference between the digestion systems of an amoeba and a mouse is that an amoeba has a single cell that performs all the functions of digestion, whereas a mouse has specialized organs that perform different roles in the process of digestion. The digestive system of a mouse is adapted to break down complex food molecules into smaller units that can be absorbed and utilized by the body, while the digestive system of an amoeba is adapted to break down small food particles that can be absorbed directly into the cell.
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This chart gives data on greenhouse gas emissions in the United States from 1990 to 2013. Which questions would help clarify the evidence in the chart? Graph of U.S. Greenhouse Gas Emissions by Gas, 1990-2013. Horizontal line, 1990-2013. Bottom to above, gases shaded are Fluorinated, Other greenhouse, Methane, Carbon Dioxide in million metric tons of carbon dioxide equivalents ranging from 0-8,000.
Answers
The questions that would help clarify the evidence in the chart are:
A. What percentage of total greenhouse gas emissions is caused by natural sources?
C. Why are carbon dioxide emissions so much higher than other greenhouse gases?
What are greenhouse gases?A greenhouse gas is a particular kind of gas that both absorbs and emits radiant radiation, which causes the atmosphere to warm.
Methane, nitrous oxide, carbon dioxide, and other manmade compounds are among the main greenhouse gases.
Carbon dioxide is cited as the most significant greenhouse gas since it now contributes the most to the warming caused by human activity,
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Complete question:
This chart gives data on greenhouse gas emissions in the United States from 1990 to 2013. Which questions would help clarify the evidence in the chart? Select ALL the correct answers.
1. What percentage of total greenhouse gas emissions is caused by natural source?
2. Should industries emitting carbon dioxide in huge amounts be fined or punished?
3. Why are carbon dioxide emissions so much higher than other greenhouse gases?
4. Why did the quantity of carbon dioxide emissions stay constant throughout the period?
5. What is the chemical formula for methane?
Which subgroup is the lowest?
Answers
Answer:
The answer to this question would be :4.) SpeciesIn taxonomy, the organism will be divided into different groups based on a specific character from that organism. It could be an organ
The sequence from top to bottom would be:
life
domain
kingdom
phylum
class
order
family
genus
species
The lowest subgroup is called species
question at position 16 when populations get very small, harmful alleles may be expressed in individuals more often because:
Answers
When populations get very small, harmful alleles may be expressed in individuals more often because:
The gene pool becomes smaller and more limited: In a small population, there are fewer genetic variations present, which means that harmful alleles that may be present in the gene pool are more likely to be expressed in individuals.There is an increased risk of inbreeding: In a small population, there is a higher likelihood of inbreeding, which means that individuals are more likely to mate with close relatives. The effects of natural selection are weakened: In a larger population, natural selection can help to eliminate harmful alleles by favoring individuals with beneficial traits.This is why it is important for populations to maintain a certain level of genetic diversity, which can help to buffer against the negative effects of harmful alleles and preserve the overall health of the population.
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2. You are evaluating the effect of different types of fertilizers on plant growth. You plant 12 tomato plants and divide them into three groups, where each group contains four plants. To the first group, you do not add fertilizer and the plants are watered with plain water. The second and third groups are watered with two different concentrations of the same type of fertilizer. After three weeks, you check the growth by measuring the heights of each plant in centimeters and calculate the average growth for each concentration of fertilizer. The collected data was then presented in the table below. Table 1: The effect of different concentration of fertilizer on tomato plant growth over three weeks Treatment No treatment 50 M 100 M Plant Number 1 10 15 22 2 12 16 25 3 8 14 21 4 9 12 27 Average 9.75 14.25 23.75 1. Study the table and detect some errors. (03) 2. Provide the calculation which resulted to the average of the heights of the plants treated with pure water. (04) 3. Consider the averages of heights of plants to plot a complete labelled graph using Microsoft excel. (06)
Answers
The average is used to provide a central value that represents different values to make an analysis or a comparation. The attached image shows a plot comparing the averages of plants growth.
What is an average?
In simple words, the average is the addition of a group of values divided by n, which is the total number of values considered. It is also known as media.
It is used to provide a single central value that represents several different values.
Group of values: X₁, X₂, X₃, X₄, X₅
n = 5
Average = (X₁ + X₂ + X₃ + X₄ + X₅) / 5
In the exposed example,
1) In the attached files you will find the image of the table.
According to this image, there is no errors. You should compare this table with yours and analyze if there is any difference.
2) Average of the heights of the plants treated with pure water
Group of values: 10, 12, 8, 9
n = 4
Average = (10 + 12 + 8 + 9) / 4 = 39/4 = 9.75
3) You will find the graph in the attached files.
In these graphs you will find
a combined graph in which it is detailed the growth of each plant together with the average growth per treatment.another bar graph only representing the averages of heights of plants.
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by the 10th week of gestation, which of the following statements are true? select all that apply. the placenta has implanted in the lower anterior of the uterus. the formation of all four limbs can be seen. organogenesis has occurred. the heart has been beating for a few weeks. the foramen ovale has closed.
Answers
By the 10th week of gestation, The formation of all four limbs including brain, heart, lungs and hands and legs can be seen.
A significant development occurs in week 10 of pregnancy: the fetus is now the baby instead of an embryo. Simply said, these two phrases describe several developmental stages. The embryonic stage is when the body's major organs, such as the brain, heart, and lungs, as well as the arms and legs, are formed. These organs and parts have created, and they are currently growing and developing once you have a fetus.
The baby's arm joints are functioning and cartilage and bones are growing at 10 weeks' gestation. Hair and fingernails are beginning to grow as well. Baby is roughly 1.2 inches long and.14 ounces in weight during week 10 of pregnancy, making it as large as a strawberry. The body length of this 10-week-old fetus will nearly double during the following three weeks.
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How are latitude and temperature related?
Question 2 options:
Higher latitudes will have warmer water because it is closer to the poles.
Lower latitudes will have warmer water because it is closer to the poles.
Higher latitudes will have warmer water because it is closer to the equator.
Lower latitudes will have warmer water because it is closer to the equator.
Answers
Lower latitudes will have warmer water because it is closer to the equator.
Latitude refers to the coordinates that indicate north-south (NS) geographic positions on the Earth's surface. Lower latitudes are closer to the Equator, whereas higher latitudes are closer to the poles.In the Equator, the amount of solar radiation received by the surface of the Earth is higher than in the poles (and therefore also the temperature) due to the angle of sun rays.In conclusion, lower latitudes will have warmer water because it is closer to the equator.
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In between the two main groups of planets of the solar system, there is a vast belt of billions of asteroids. What are these asteroids mostly made of?
Answers
Answer:
Rocks of varying sizes.
Explanation:
Billions of asteroids between two main groups of planets in the solar system are rocks of various sizes.
What are asteroids?The solar system's asteroid belt is a torus-shaped area about halfway between Jupiter and Mars orbits. It has a large number of asteroids or minor planets.
Which are solid bodies with erratic shapes and sizes that are smaller than planets. It seems that one or more planets may have developed in the zone between Mars and Jupiter, but Jupiter's gravity kept tearing everything apart.
The material in this area was never able to create a single planet, just asteroid-sized particles.
Therefore due to various solid particles between the two main planets, there is a belt of asteroids.
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Two two-digit numbers, 'AB' and 'BA', sum to
produce a three-digit number in which the second d
igit
is equal to A. The addition is represented below. (Note
that the variables are used to represent individual digits;
no mu
ltiplication is
taking place).
AB + B
A= 1A2
What
is B?
Answers
Answer:
9
Explanation:
Another way to represent this question is:
+ AB BA1A2
In the one's column, B and A add to produce a number with a two in the one's place. In the ten's column, we can see that a one must carry in order to get a digit in the hundred's place. Together, we can combine these deductions to see that the sum of A and B must be twelve (a one in the ten's place and a two in the one's place).
In the one's column: B+A=12
The one carries to the ten's column.
In the ten's column: (1)+A+B=(1)+12=13
The three goes into the answer and the one carries to the hundred's place. The final answer is 132. From this, we can see that A=3 because 1A2=132.
Using this information, we can solve for B.
A+B=12 and A=3
3+B=12
B=9