George's doctor will need to culture the isolated S. aureus to determine if the isolated bacterium is the one responsible for the infection.
What is Koch's postulates?Robert Koch was a famous microbiologist that made some postulates as follows:
The bacteria must be present in every case of the disease.The bacteria must be isolated from the host with the disease and grown in pure culture.The specific disease must be reproduced when a pure culture of the bacteria is inoculated into a healthy susceptible host.The bacteria must be recoverable from the experimentally infected hostAccording to this question, S. aureus has been isolated from George’s infected wound.
This means that in accordance with Koch's postulates, George's doctor will need to culture the isolated S. aureus to determine if the isolated bacterium is the one responsible for the infection.
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Which factor can decrease the rate of a chemical reaction?
A low activation energy
B high pressure
C low temperature
D high concentration of enzyme
(c)Low Temperature of the Reactants can decrease the rate of a chemical reaction.
How temperature effects the rate of a chemical reaction
Chemical reactions typically occur faster at higher temperatures. Food can spoil quickly when left on the kitchen counter. However, the lower temperature inside of a refrigerator slows that process so that the same food remains fresh for days. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.Thus decrease in the temperature of a reaction can help in decreasing the rate of a chemical reaction.Lower the temperature lower the chemical reaction rate.
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Which one of the following
molecules would be most
likely to travel by facilitated
diffusion?
A. Uncharged oxygen molecule (02)
B. a large organic molecule
C. Uncharged neon atoms (Ne)
Uncharged oxygen molecules would be most likely to travel by facilitated diffusion.
What is facilitated diffusion?Facilitated diffusion is a transport mechanism by which molecules move to both sides of biological membranes in favor of a concentration gradient.
Facilitated diffusion generally involves small molecules such as O2 and does not involve energy expenditure.
In conclusion, uncharged oxygen molecules would be most likely to travel by facilitated diffusion.
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Because one of the two strands of a replicated DNA molecule is newly synthesized and the other is the original template, DNA replication is said to be a ______ process.
Because one of the two strands of a replicated DNA molecule is newly synthesized and the other is the original template, DNA replication is said to be a semi-conservative process.
What is DNA replication?DNA replication may be defined as the biological process that involves duplicating a DNA molecule comparable to the construction of two DNA molecules.
DNA replication is proceeded by the semiconservative model, which means that the parental double helix is half conserved, and each parental single strand remains intact.
Therefore, it is well described above.
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What molecule is the final electron acceptor in the Electron Transport Chain?
The final electron-accepting molecule in the electron transport chain is oxygen.
Role of oxygen in the electron transport chainOxygen mainly acts as an electron acceptor in the electron transport chain. More specifically, it acts as the final electron acceptor to ensure that oxidative phosphorylation takes place.
Without this final electron acceptor, the electron transport chain will not be able to complete the cycle, and energy molecules in the form of ATP will not be formed.
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How many of Earth's spheres does
the carbon cycle move through?
A. one
B. a few of the Earth's spheres
C. impossible to know
D. all of the Earth's spheres
The carbon cycle moves through virtually all of the earth's spheres.
Carbon cycle
There are 4 majors spheres of the earth:
AtmosphereGeosphere or LithosphereBiosphereHydrosphereThe carbon cycle moves through the air (atmosphere), oceans (hydrosphere), organisms (biosphere), and the soil (geosphere).
Thus, the carbon cycle moves through all the spheres of the earth.
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Answer: D. all of the Earth's spheres
Explanation:
During development, how many bones combine to form each of the coxal bones?.
Coxal bone is constructed up of a fusion of three bones: ilium, ischium, and pubis. Ilium- Ilium is the biggest part of the coxal bone.
which factor will mostly likely decrease biodiversity? complex population interactions introduced species increased energy availability narrower niches
The factor that mostly likely decrease biodiversity in a ecosystem is narrower niches because narrower niches does not give way for various organisms to inhabit .
What is biodiversity?Biodiversity refer to various or different kind of plants and animals present in the environment and their role in their habitat
Therefore, The factor that mostly likely decrease biodiversity is narrower niches
because narrower niches does not give way for various organisms to inhabit.
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If the population of poison dart frogs in this rain forest community were to disappear, which of these populations would be most likely to increase?
A: Fruit bat
B: Sloth
C: Beetle
D: Strangler fig
Answer:
c
Explanation:
the beetles fall prey to the poison dart from so if they went extinct they wouldn't be a threat to the beetles population
Which does NOT describe bacteria? one niet
A They are prokaryotic cells.
B They have cell walls and cell membranes.
C Their genetic material is found in the cytoplasm.
D They have membrane-bound organelles.
Answer:
D they have membrane bound organelles
Explanation:
Which of these statements is NOT true of the phylogenetic tree?
The statement that is not true of the phylogenetic tree is that it ranks organisms by importance in evolutionary history. option A
Features of the phylogenetic treeA phylogenetic tree is a diagram representing evolutionary relationships among organisms. It is also known as phylogenyPhylogenetic trees are hypothesesIt reflects how species or other groups evolved from a common ancestors.Hence, the statement that is not true of the phylogenetic tree is that it ranks organisms by importance in evolutionary history. option A
The complete question is:
Which of these statements is NOT true of the phylogenetic tree?
A. It ranks organisms by importance in evolutionary history.
B. It depicts an organism's lineage as it changes over time.
C. It shows successive events of speciation in which one species gives rise to two.
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Which event is NOT part of the process of DNA replication?
1.Ribosomes are synthesized.
2.Hydrogen bonds are broken.
3.Nitrogenous base pairs are formed.
4.A double-stranded molecule unwinds.
Explanation:
1 cuz we don't need that ,we need all of them exept number 1
Answer:
1. (Ribosomes are synthesized)
Explanation:
Ribosomes are only involved in the translation of mRNA to proteins. During DNA replication DNA helicase unwind the DNA double-strand by breaking hydrogen bonds between the two strands. DNA polymerase then replicates each strands using nucleotides complimentary of the replicating strands.
The answers above is not my original answer, this question has already been answered previously by someone else, so all credit is given to Diatonic254.
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Can someone help me please
wise is the answer because the word bold also means wise
the answer is lazy because sage also means lazy
The area around the Sahara desert is slowly changing into a dry region like desert. Which trait is most likely to be selected in the population of plants growing in this region?
Answer:
drought resistant trait
100 POINTS
e) The allele for small size is recessive, and the allele for normal size is dominant. The frequency for the normal-size allele is 0.72. What percentage of the rats are normal sized? (3 points)
Answer:
51.84%
Explanation:
p² + 2pq + q² = 1 and p + q = 1
p = frequency of the dominant allele in the population
q = frequency of the recessive allele in the population
p² = percentage of homozygous dominant individuals
q² = percentage of homozygous recessive individuals
2pq = percentage of heterozygous individuals
p = 0.72 => p² = 0.72² = 0.5184
=> Percentage of the rats are normal sized: 51.84%
i need help with part b
Sari and Jon disagree over who needs more calories (proportionately) per day to survive a three-month-old baby or a
grown adult San argues that a grown adult is bigger and needs more calories per pound of body weight Jon believes
the baby would require more calories per pound of body weight
he is most likely conect and why?
San, because it takes more energy to move the larger muscles that adults have, so they need more calories
Jon, because babies grow at a much berate than adults and require more cabries to support this growth
Jah, because babies are more active than grown adults and need more energy from calories
San because adults have more to do during the day and need more calories to sustain their activities
San is correct , because it takes more energy to move the larger muscles that adults and is denoted as option A.
What is Calorie?This is referred to as a unit of energy in food substances such as carbohydrates, fats etc.
Adults have larger muscles composed of bigger tissues which requires more energy for their functioning in our daily activities which is why San was correct.
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The primary mirror in a reflecting telescope is a
plane mirror.
concave mirror.
convex mirror.
Answer:
B or concave mirror.
Explanation:
Arrange the symbols to form a dna molecule. an upward arrow. a downward arrow. 5' an upward arrow. a downward arrow. 3'
The clear representation of the DNA molecule is represented below in the picture.
What is a DNA molecule?A DNA molecule may be characterized as a molecule that possesses the biological instructions that assemble each species remarkable. It is a molecule found inside cells that comprises the genetic information accountable for the expansion and operation of an organism.
A DNA molecule is comprised of nucleotide base pairs like Adenine (A), Thymine (T), guanine (G), and cytosine (C).
According to Chargaff's rule, adenine is bounded to thymine with the help of two hydrogen bonds while guanine is bounded to cytosine with the help of three hydrogen bonds.
Therefore, it is well described above.
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Answer:
C T
A. G
3'. 5'
Explanation:
A/An ____________________ reaction involves binding antigens to antibodies.
Answer:
its "A" reaction involves binding antigens to antibodiess
Explanation:
it is because An only comes before a vovle word
An immune reaction involves binding antigens to antibodies.
What is an immune reaction?An immune reaction is a type of reaction that take place in the immune system if the body which involve binding of antigens to the antibodies to prevent foreign invaders.
Therefore, An immune reaction involves binding antigens to antibodies.
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A plant is homozygous for the production of yellow seeds (YY) and homozygous for wrinkled seeds (r). What possible gametes will this plant produce?
OA. Yr only
OB. YY and rr only
OC. Y, y, and r only
OD. YR, Yr, yR, and yr
A plant is homozygous for the production of yellow seeds (YY) and homozygous for wrinkled seeds, possible gametes will this plant produce (r) Y, y, and r only. Thus, option "C" is correct.
How, explain your answer?The plant is heterozygous (Yy) for the color of seed and homozygous (rr) for the shape of the seed.
For the color of the seed, there are two alleles that will take part in gametes formation are (Y) n (y) while for the shape of seed is have only two recessive alleles (r).
So, by the assortment of (Y) n (r) the first gamete will be (Yr) and an assortment of (y) n (r) second gamete will be (yr).
Thus, the correct answer is option C. Yr and yr only.
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Which of these factors causes populations to compete?
A. Continuous migration
B. Low population densities
C. Limited resources
D. High death rates
why is cooling of the plant important
Answer:
When temperatures are too high, energy systems (metabolic functions) slow, and growth and flowering slows or stops.
Explanation:
-cooling the plant and pumping water and minerals to the leaves for photosynthesis. Plants need to cool themselves for several reasons.
In this investigation, you will observe the release of O2 and CO2 into the environment. Gas production by two types of organisms will serve as evidence of photosynthesis and cellular respiration in action. In part 1, you will vary the amount of sugar present and observe the effect on cellular respiration.
Anaerobic (without oxygen) and aerobic (with oxygen) cellular respiration are both possible (without oxygen).
During aerobic cellular respiration, glucose and oxygen combine to create ATP, which the cell can utilise. As byproducts, carbon dioxide and water are produced.
What are the three stages of cellular respiration?The Krebs cycle, oxidative phosphorylation, and glycolysis—an anaerobic process—are the three phases of aerobic cellular respiration.
All forms of cellular respiration begin with glycolysis, which is anaerobic and oxygen-free. The pathway will go on to the Krebs cycle and oxidative phosphorylation if oxygen is present. However, some species may engage in fermentation to continuously manufacture ATP in the absence of oxygen.
Total amount of ATP molecules generated during aerobic respiration from a single glucose molecule.
During glycolysis:
As 2ATP
From 2NADH 5ATP (oxidation phosphorylation)
In pyruvate oxidation;
From 2NADH 5ATP (oxidative phosphorylation)
Citric acid cycle;
ATP ATP (substrate level phosphorylation)
From 6NADH 15ATP (oxidative phosphyrlation)
From 2 FADH2 3ATP
Total Number ATP = 32 ATP
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tuberculosis, botulism, and tetanus are examples of diseases caused by rod-shaped bacteria known as ______________.
Bacilli is a rod shaped bacteria that cause diseases like tuberculosis, botulism, and tetanus.
What is Bacilli?Bacilli refer to a group of bacteria that is small, rod shaped and also a gram positive bacteria which causes diseases or infections on their host. They normally transmit diseases through infected food, water and animal bite.
Therefore, Bacilli is a rod shaped bacteria that cause diseases like tuberculosis, botulism, and tetanus.
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which two parts of the microscope cause magnification
Answer:
Enlargement or magnification of a specimen is the function of a two-lens system; the ocular lens is found in the eyepiece, and the objective lens is situated in a revolving nose-piece.
Which of the
following is the
correct pairing of
the cell type to its
purpose?
A. parenchyma cell-thin cell wall, perform
metabolic functions, and make up most of
the plant
B. sclerenchyma cell-strong cell walls that
support the plant and allow it to bend
C. collenchyma cells-thick, hard cell walls to
make it tough like a seed coat
The statement that correctly pairs the cell type and it's purpose is as follows: parenchyma cell - thin cell wall, perform metabolic functions, and make up most of the plant (option A).
What are the types of plant cells?Plant cells are of varying types and they perform different functions in the system.
The simple cell types that can be found in plants are as follows:
Parenchyma; the cellular tissue, typically soft and succulent, found chiefly in the softer parts of leaves, pulp of fruits. Collenchyma; living, elongated, mechanical and flexible ground tissue with angular pectin depositions; present just under leaves, tendrils and stems Sclerenchyma; mechanical ground tissue, impermeable to water, which consists of cells having narrow lumen and thick, mineralized walls of ligninFrom the above description, the statement that correctly pairs the cell type and it's purpose is as follows: parenchyma cell - thin cell wall, perform metabolic functions, and make up most of the plant.
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Jake wants to enrich the nitrogen content of his soil through fixation which crop can he use for this purpose
Answer:
He can use beans since it is a legume and legumes have root nodules that facilitate nitrogen fixation
An example of a wobble base is?
Answer:
The four main wobble base pairs which are:
guanine–uracil (G–U),hypoxanthine–uracil (I–U), hypoxanthine–adenine (I–A), hypoxanthine–cytosine (I–C).Choose any one of them.
Compare the structure and location of the human large intestine with those of the fetal pig.
The comparison between the structure and location of the human large intestine with those of the fetal pig are as described below.
What are the differences in the hearts?Fetal Pigs usually have large intestines that is located at their left side and is primarily a predominant spiral colon.
However, the human heart is different because it has an ascending colon on the right side that is connected to the descending colon on the left side of our body by the transverse colon.
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Starch is digested in the small intestine. the small intestine contains many structures that absorb glucose.
