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Related Questions
Which of the following months would be the darkest at the South Pole?
Answers
Answer:
Winter in Antarctica.
Explanation:
Winter in Antarctica is dark all of the time. In the Antarctic summer, (between January and March, when there is plenty of daylight—twenty-four hours a day! In September, the Sun rises, and then doesn't set again until March.
What are the possibilities for the
offspring's eye colour?
Answers
Both parents have brown eyes 75% chance of having a brown-eyed baby 18.8% chance of having a green-eyed baby, and a 6.3% chance of having a blue-eyed baby. If both parents have blue eyes: 99% chance of having a blue-eyed baby a 1% chance of having a green-eyed baby, and a 0% chance of having a brown-eyed baby.
Your child inherits the eye color from you and your partner. This is a combination of mom's and dad's eye colors. Generally, the color is determined by this combination and whether the gene is dominant or recessive. Every child has two copies of each gene. One from her mother and one of hers from her father.
Simply put brown-eyed parents can produce children with brown eyes blue eyes or virtually any color of the eye. Eye color is very complex and many genes are involved. Some people appear to have a black iris, which technically does not exist. doing. In fact, brown eyes are the most common eye color for newborns.
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There are n bacteria and one virus in a Petri dish. Within the first minute, the virus kills one bacterium and produces another copy of itself, and all of the remaining bacteria reproduce, making 2 viruses and 2(n−1) bacteria. In the second minute, each of the viruses kills a bacterium and produces a new copy of itself, resulting in 4 viruses and 2(2(n−1)−2))=4n−8 bacteria. Again, the remaining bacteria reproduce. This process continues every minute. Will the viruses eventually kill all the bacteria? If so, give an algorithm that computes how many steps it will take. How does the running time of your algorithm depend on n ?
Answers
The viruses will eventually kill all the bacteria. The running time of the algorithm is approximately O(log n).
Yes, the viruses will eventually kill all the bacteria. The number of bacteria decreases with each step, while the number of viruses doubles. The algorithm for determining the number of steps increments the step until the number of remaining bacteria becomes zero.
The running time of the algorithm is approximately logarithmic in nature, as the number of steps required to eliminate all bacteria grows logarithmically with the initial number of bacteria, n. This means that as the number of bacteria increases, the running time of the algorithm increases at a slower rate, making it an efficient approach for large values of n.
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The plague is an ancient disease that can still causes infections worldwide including endemic infections in US. What is the causative agent for plague? Borrelia burgdorferi Epstein Barr virus poliovirus Yersinia pestis Francisella tularensis If you look at the surface of one B cell, which molecules/receptors would you find? Choose all thit apply. MHC- TCR BCR MHC-11 lgD tgM The 1918H1 N1 swine flu first arose in pigs but crossed over into the human population. The virus then spread from person to person, infecting an estimated 500 million people globally. Descendant variants of the 1918 strain contribute to seasonal influenza, and in 2009 a variant arose in Mexico and California and spread across the world. How would you best classify this disease occurrence? pandemic epidemic sporadic endemic When antibodies bind to an antigen, it can be detected by proteins of the innate immune system. If the antigen is on a cell, the proteins can form a complex to cause lysis. This process is called complement activation opsonization agelutination neutralization Which of the following is NOT characteristic of B cells? They originate in the bone marrow They have antibodies on their surface They are responsible for the memory response They are responsible for antibody production They recognize antigens preserited on MiHC-1 Which of the following is an antigen presenting cell? Mark all that apply. Dentritic cells Macrophages Theiper cells B cells Cytotoxic T cells Release of LPS layer from gram positive cell wall can cause severe drop in blood pressure that can be deadly. True False
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(A)Option 4 Yersinia pestis, (B)Option 2 and 3 BCR and MHC-II, (C) Option 1 pandemic, (D) Option 1 complement activation, (E) Option 5 they recognize antigens presented on MHC-I, (F) Option 1,2, and 4 dendritic cells, macrophages, and B cells, (G) false.
A) Plague is an ancient disease caused by the bacterium Yersinia pestis. Despite its historical significance, it can still cause infections worldwide, including endemic infections in the US. The causative agent for plague is Yersinia pestis, not Borrelia burgdorferi, Epstein Barr virus, poliovirus, or Francisella tularensis.
B) B cells, a type of white blood cell, play a crucial role in the immune response. On the surface of B cells, you would find B cell receptors (BCR) and major histocompatibility complex class II molecules (MHC-II). These molecules/receptors are involved in the recognition and presentation of antigens to other immune cells. MHC-TCR, MHC-11, lgD, and IgM are not found on the surface of B cells.
(C) The described disease occurrence, where the 1918H1N1 swine flu crossed over into the human population and spread globally, can be best classified as a pandemic. A pandemic refers to the worldwide spread of a new disease.
(D) When antibodies recognize and bind to an antigen, they can trigger a cascade of events known as complement activation. Complement proteins, part of the innate immune system, can bind to the antigen-antibody complex. This binding leads to the activation of a series of proteins in the complement system, resulting in various immune responses.
(E)B cells are responsible for memory response and antibody production, but they do not recognize antigens presented on MHC-I. B cells originate in the bone marrow and have antibodies (BCR) on their surface.
(F) Antigen-presenting cells are responsible for capturing, processing, and presenting antigens to other immune cells. Dendritic cells, macrophages, and B cells are examples of antigen-presenting cells. Helper cells and cytotoxic T cells are not antigen-presenting cells.
(G) The release of the lipopolysaccharide (LPS) layer from the gram-negative cell wall, not the gram-positive cell wall, can cause a severe drop in blood pressure. This condition, known as endotoxic shock, can be deadly. Therefore, the statement "Release of the LPS layer from the gram-positive cell wall can cause a severe drop in blood pressure that can be deadly" is false.
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The complete question is:
A. The plague is an ancient disease that can still cause infections worldwide including endemic infections in the US. What is the causative agent for plague?
1. Borrelia burgdorferi
2. Epstein Barr virus
3. poliovirus
4. Yersinia pestis
5. Francisella tularensis
B. If you look at the surface of one B cell, which molecules/receptors would you find? Choose all that apply.
1. MHC- TCR
2. BCR
3. MHC-11
4. lgD
5. IgM
C. The 1918H1 N1 swine flu first arose in pigs but crossed over into the human population. The virus then spread from person to person, infecting an estimated 500 million people globally. Descendant variants of the 1918 strain contribute to seasonal influenza, and in 2009 a variant arose in Mexico and California and spread across the world. How would you best classify this disease occurrence?
1. pandemic
2. epidemic
3. sporadic
4. endemic
D. When antibodies bind to an antigen, it can be detected by proteins of the innate immune system. If the antigen is on a cell, the proteins can form a complex to cause lysis. This process is called
1. complement activation
2. opsonization
3. agglutination
4. neutralization
E. Which of the following is NOT characteristic of B cells?
1. They originate in the bone marrow
2. They have antibodies on their surface
3. They are responsible for the memory response
4. They are responsible for antibody production
5. They recognize antigens presented on MiHC-1
F. Which of the following is an antigen-presenting cell? Mark all that apply.
1. Dendritic cells
2. Macrophages
3. The Helper cells
4. B cells Cytotoxic
5. T cells
G. Release of the LPS layer from the gram-positive cell wall can cause a severe drop in blood pressure that can be deadly. True/False
which of the following channels in the active zones of the synaptic terminal open when the membrane depolarizes and causes the release of synaptic vesicles? choose the correct option.
a. dosium channels
b. potassium channels
c. voltage-gated calcium channels
d. voltage-gated sodium channels
Answers
Voltage-gated calcium channels in the active zones of the synaptic terminal open when the membrane depolarizes and causes the release of synaptic vesicles. Hence the correct option is C.
When the membrane depolarizes and triggers the release of synaptic vesicles, it is primarily mediated by voltage-gated calcium channels located in the active zones of the synaptic terminal. These channels play a crucial role in synaptic transmission by allowing the influx of calcium ions into the presynaptic terminal.
During an action potential, as the membrane depolarizes, voltage-gated calcium channels are activated and open in response to the changes in membrane potential. The depolarization causes a rapid influx of calcium ions into the presynaptic terminal. The concentration of calcium ions in the terminal is normally much lower than outside the cell, so the influx of calcium ions leads to a substantial increase in intracellular calcium levels.
Hence the correct option is C.
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With respect to F+ and F- bacterial matings, answer the following questions:
(a) How was it established that physical contact between cells was necessary?
(b) How was it established that chromosome transfer was unidirectional?
(c) What is the genetic basis for a bacterium’s being F+?
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Concerning F+ and F- bacterial matings, it can be said that (a) the necessity of physical contact was proved through Lederberg and Tatum's experiments, (b) experiments by Hayes et al. in 1952 proved the unidirectional nature of chromosome transfer, and (c) the genetic basis for a bacterium's being F+ is the presence of a fertility (F) factor.
Concerning the mentioned bacterial matings, we can tell that (a) Lederberg and Tatum discovered that E. coli cells could exchange genetic material through a process, i.e., bacterial conjugation. They showed that when F+ cells and F- cells were mixed in a culture, the F+ cells transferred genetic material to the F- cells only when physical contact was established between them.
(b) Hayes et al. observed that F+ cells could transfer genetic material to F- cells, but the F- cells could not transfer genetic material back to the F+ cells. This led them to conclude that chromosome transfer during bacterial conjugation was unidirectional.
(c) The fertility factor (F factor) contains genes that encode for the production of a pilus, a thin filamentous structure that allows the F+ cells to attach to F- cells and transfer genetic material.
The F factor can also exist as a plasmid (a circular piece of DNA separate from the bacterial chromosome). Bacteria that contain the F factor are referred to as F+ cells, while those that do not have the F factor are referred to as F- cells.
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Give an example of a nonnative species that was introduced into an ecosystem that had a negative impact on the indigenous (native) species and describe what happened.
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Answer:
The Gypsy Moth, Nutria, Zebra Mussel, Hydrilla, Sea Lamprey and Kudzu are examples of non-natives that have caused massive economic and ecological losses in new locations because the natural controls of their native ecosystems were not there.
Non-native species can provide services useful to humans, particularly in facilitating many contemporary needs of ... For example, D. polymorpha has both numerous negative and positive effects on natural ecosystems.
Explain why your model improves upon the student’s original model. How would your model help someone who was learning about photosynthesis for the first time? Plato question
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Answer:
Due to inclusion of more steps of photosynthesis.
Explanation:
My model is more advance than the student's original model which provides more information about the process of photosynthesis to the learners by explaining various parts of photosynthesis. My model presents the various steps of photosynthesis in a very efficient way with the help of including some extra parts. The student's original model is not more advance so it can't provides more information about the process of photosynthesis so that's why my model provides more information about photosynthesis.
Answer:
This model shows all the major molecules involved in the Calvin cycle and how they change at each stage of the process. This added detail would clarify that the Calvin cycle is a series of complex steps. The student’s original model didn’t show this breakdown at all, and it shows only the final products. This model also shows the number of each molecule created, which the original model doesn’t do.
Question 15
Mary uses the process of baking a cake as a model to help her friend understand how genes function in people. The ingredients in Mary’s cake recipe are:
Flour
Milk
Eggs
Baking powder
Sugar
Butter
Vanilla
The cake recipe provides directions for how to mix the ingredients together, the temperature of the oven, and the length of time the cake needs to bake. The end result is a plain, yellow cake.
Define "neutral mutation" and use Mary’s model to provide an example
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A neutral mutation is a mutation that does not produce damage in organisms when they occur.
The sequence of the addition of the ingredients may be altered without affecting the cake product.
What are neutral mutations?Neutral mutations are mutations that occur in the DNA that do not produce any detrimental or deleterious effect on the gene product that the mutation has occurred.
Mutations are changes that occur in the sequence of nucleotides in a DNA molecule.
Considering the process of baking cake, the sequence in which the ingredients that are used to bake the cake are added may be altered but still obtain the same result.
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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
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Below are some events that take place during cell division? Which would be the correct order?
I. Chromosomes line up at the equatorial plane
II. Chromosomes condense, becoming shorter and thicker
III. Chromosomes have long and nuclear membrane forms around them
IV. Centromeres divide and the chromosomes move to the opposite poles
a. 2-1-4-3
b. 3-4-1-2
c. 1-3-2-4
d. 4-1-2-3
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The correct order of events during cell division is: 3-4-1-2, the correct option is b.
During cell division, several key events occur in a specific order.
Chromosomes have long and nuclear membrane forms around them: Before cell division occurs, the chromosomes within the nucleus start to undergo changes. Centromeres divide and the chromosomes move to the opposite poles: At this stage, the centromeres, which hold the sister chromatids together, divide. Chromosomes line up at the equatorial plane: Once the chromosomes have reached the opposite poles of the cell, they align themselves along the equatorial plane or the metaphase plate. Chromosomes condense, becoming shorter and thicker: In this step, the chromosomes further condense, becoming even shorter and thicker.Thus, the correct order, b. 3-4-1-2, accurately represents the sequence of events during cell division.
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Find all of the plural or possessive errors. Select each one and type it correctly.
Mooses' fur grows darker as they grow older. While mature moose have dark,
brown coats, calves have light brown fur.
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Answer: Moose's fur grows darker as they grow older. While mature moose have dark, brown coats, calves have light brown fur.
Explanation:
In the original sentence, "mooses" is the plural form of "moose," but it is not a correct plural form. The correct plural form of "moose" is "moose." The possessive form of "moose" is "moose's." Therefore, the correct sentence should be "Moose's fur grows darker as they grow older. While mature moose have dark, brown coats, calves have light brown fur."
Can someone please help me thank you
Answers
2) molecule
3) matter
4) chemical reaction
5) macromolecule
hope this helps!! :)
2. Molecule
3.matter
4. Chemical reaction
5. Macromolecule
Tetrodotoxin (TTX) and botulinum toxin (BTX) are two neurotoxins that causes paralysis. What is(are) the underlying mechanism(s)? a) Both block the voltage-gated Na+ channels to inhibit the firing of
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Tetrodotoxin (TTX) and botulinum toxin (BTX) are two neurotoxins that cause paralysis. The underlying mechanisms are given below:a) Both block the voltage-gated Na+ channels to inhibit the firing of action potentials.
Both tetrodotoxin (TTX) and botulinum toxin (BTX) block voltage-gated Na+ channels to inhibit the firing of action potentials, which results in paralysis. Tetrodotoxin (TTX) is a potent neurotoxin that is found in pufferfish, whereas botulinum toxin (BTX) is produced by the bacteria Clostridium botulinum.
Both neurotoxins inhibit the release of neuro transmitters from nerve endings in muscles. TTX inhibits the release of acetylcholine (ACh) by blocking voltage-gated Na+ channels in the axons of nerve cells that supply the muscles. Botulinum toxin (BTX) prevents the release of ACh from nerve endings by blocking the docking of vesicles containing ACh with the plasma membrane of the nerve ending. As a result, muscle contraction is prevented, leading to paralysis.
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PLZ HELP!!!!
1.Why is it important to have more than one trial (multiple replicates) in a well-designed experiment?
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What is it called when rain or snowmelt seeps through soil or rock down into the aquifer?
Answers
Answer:
Groundwater
Explanation:
The compass has advanced dramatically over the years, evolving into a
Global Positioning System (GPS). The GPS is a device that is simple to use
and gives a lot of information on your position.
Which is a positive effect of the technological advance of going from a
compass to a GPS?
O A. The GPS uses less electricity.
B. The GPS gives more accurate information
O C. The GPS is less expensive,
D. The GPS is easier to manufacture,
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Answer: B
Explanation:
The GPS gives more accurate information .
What is GPS?The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services.
What are the 3 types of GPS?Three types of GPS systems are:
Street navigation systemsSports GPS systems Phones with GPSHence, A is correct option
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What does mRNA do in protein synthesis?
Answers
Answer:
It carries the message on DNA.
Explanation:
Which of the the is an example of climate
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Answer:
I'm not sure about what you are trying to ask
Biologists estimate that a randomly selected baby elk has a 44% probability of surviving to adulthood. Assume this estimate is correct. Suppose researchers choose 7 baby elk at random to monitor. Let x = the number that survive to adulthood. Find the probability that exactly 4 of the baby elk survive to adulthood. Round your answer to 4 decimal places. Leave your answer in decimal form.
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Answer:
0.2304
Explanation:
You want the probability that exactly 4 of 7 randomly selected baby elk survive to adulthood, given that the probability of any individual surviving to adulthood is 44%.
Binomial PDFThe probability that exactly 4 reach adulthood is ...
7C4·(0.44^4)·(1 -0.44)^(7-4) ≈ 0.2304
The probability that exactly 4 of 7 baby elk survive to adulthood is about 0.2304.
Why do cancer cells divide and multiple uncontrollably?
Answers
Answer:
Most cancer-causing DNA changes occur in sections of DNA called genes. These changes are also called genetic changes. A DNA change can cause genes involved in normal cell growth to become oncogenes. Unlike normal genes, oncogenes cannot be turned off, so they cause uncontrolled cell growth.
Click on the link Lymphatic System
Read the information provided about the lymphatic
system
Describe how the lymph returns to the blood.
Answers
Answer:
Explanation:
Lymphatics join up to form up larger lymph vessel than gradually transport the lymph back to the large veins that run just beneath the collarbone called the subclavian veins.
Which of the following is the best description of how anteaters evolved long tongues? a. Anteaters grew long tongues because they needed to reach inside ant hills. b. Anteaters grew long tongues because they constantly stretched their tongues. c. Random mutations occurred because anteaters needed to change. d. Each year, anteaters with the longest tongues were most likely to live. e. Changes like this depend on many factors, so it is impossible to answer.
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The best description of how anteaters evolved long tongues is option d: Each year, anteaters with the longest tongues were most likely to live.
Natural selection favors advantageous traits, such as a longer tongue in the case of anteaters, that increase an individual's chances of survival and reproduction. Over time, these advantageous traits become more common in the population.
Option a is partially correct, as anteaters do use their long tongues to reach inside ant hills, but it does not explain how they evolved to have long tongues in the first place. Option b is incorrect, as stretching alone cannot cause the evolution of a new trait. Option c is incorrect, as random mutations do not occur because an organism "needs" to change. Option e is also incorrect, as there are factors that contribute to the evolution of traits, such as natural selection and genetic drift. Hence, the correct answer is Option D.
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Answer #7 and will mark brainliest
Answers
Answer:Maybe because of the ice cores themselves because they held the carbon for so long
Explanation:
Describe the path of a polysaccharide made from glucose monomers beginning with its entry into the cell and ending with how it is used to power cellular functions.
Answers
Answer:
Polysaccharide Functions
The three main functions of polysaccharides are providing structural support, storing energy, and sending cellular communication signals. The carbohydrate structure largely determines its function. Linear molecules, like cellulose and chitin, are strong and rigid.
Explanation:
: A carbohydrate that can be decomposed by hydrolysis into two or more molecules of monosaccharides especially : one (such as cellulose, starch, or glycogen) containing many monosaccharide units and marked by complexity.
Are all of the cells the same size?
Answers
Answer:
Yes but not different shape
Explanation:
Which of the following is the flexible protein fiber that makes up the skeleton for
most sponges, including demosponges?
a) mesohy!
b) spongin
c) glass
od) amoebocyte
Answers
Answer:
A. mesohyl
Explanation:
The mesohyl includes a noncellular colloidal mesoglea with embedded collagen fibers, spicules, and various cells, being as such a type of mesenchyme.
skeletal muscle cells of animals contracting in under low oxygen conditions rely on fermentation to keep going. what product of fermentation enables the muscle cells to keep ""working?""
Answers
Fermentation is a method for producing ATP anaerobically (i.e., without oxygen).
Your muscle will begin manufacturing ATP through lactic acid fermentation as soon as the stored ATP is used up. Cells can continue producing ATP through glycolysis after fermentation. A result of fermentation is lactic acid. Oxygen is used by cells to produce ATP, or useable energy, from the food we consume. Usually, this is accomplished by means of cellular respiration. In the final step of the electron transport chain, where the majority of ATP is produced, during cellular respiration, oxygen receives electrons. The electron transport chain stops producing ATP in the absence of oxygen.
Glycolysis during fermentation only yields two ATP per glucose molecule, which is significantly less ATP than is produced during cellular respiration.
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In the citric acid cycle, the acetyl group of each molecule of acetyl-coa is converted into two molecules of ________.
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In the citric acid cycle, the acetyl group of each molecule of acetyl-CoA is converted into two molecule of carbon dioxide and water. It is the pathway that connects carbohydrates ,fat and protein metabolism.
The cycle which carried out by eight enzymes that completely oxidase acetate by which two carbon molecules in the form of acetyl -CoA into two carbon dioxide and water molecules.6- carbon glucose molecule is split into two 3- carbon molecules called pyruvate , which needs in order to create acetyl CoA.
Citric acid cycle is also known as krebs cycle or TCA cycle it is the series of chemical reactions to release to releases stored energy through the oxidation of acetyl-CoA from carbohydrate, fats and protein.
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2 Which of the following plants most likely grew in the dark
A
B
С
D
Answers
Answer:
plant B
Explanation: