a helper t cell response to a protein antigen requires the participation of antigen-presenting cells that express which types of molecules?
Answers
A helper T cell response to a protein antigen requires the participation of antigen-presenting cells (APCs) that express major histocompatibility complex class II (MHC II) molecules.
When a protein antigen is encountered by an APC, such as a dendritic cell, macrophage, or B cell, the antigen is internalized, processed, and presented on the cell surface in association with MHC II molecules.
MHC II molecules are responsible for presenting antigenic peptides to helper T cells. These MHC II-peptide complexes on the surface of the APC act as recognition signals for helper T cells.
Helper T cells have specific T cell receptors (TCRs) on their surface that can recognize and bind to the antigen-MHC II complex. This interaction between the TCR on the helper T cell and the antigen-MHC II complex on the APC is essential for initiating the helper T cell response.
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Related Questions
32
how do you think having specialized cells is an advantage for a multicellular organism?*
(1 Point)
because different cell types can perform different functions
Obecause different cell types can perform same functions
O all of the above is correct
none of the above is correct
Answers
Answer:
because different cell types can perform different functions
The graph shows ice core data that illustrate historical trends in the amount
of carbon dioxide in Earth's atmosphere. Scientists attribute global warming
to recent increases in human activities that produce carbon dioxide. Which
kind of data would show that a new solution to the problem of global
warming is working?
A. Historic atmospheric CO2 levels would be the same as current
levels
B. Current atmospheric CO2 levels would be increasing at a steady
rate.
C. Historic atmospheric CO2 levels would no longer appear to
increase over time.
D. Current atmospheric CO2 levels would be increasing more slowly.
Answers
Answer: D. Current atmosphere CO2 levels would be increasing more slowly.
Explanation: A P E X
The graph shows historical trends in the amount of carbon dioxide in Earth's atmosphere. The data would show that a new solution is Historic atmospheric CO2 levels would no longer appear to increase over time.
What can cause the increase of CO2 in the atmosphere?In the last 200 years, the concentration of carbon dioxide in the atmosphere has increased by 27% — due to the burning of fossil fuels with the beginning of the industrial age and deforestation — with half of this increase occurring in the last 30 years.
A possible solution to reduce CO2 emissions would be to store it in underground brine, also generating geothermal energy and methane as fuels. So in the future, we will see a historic atmospheric CO2 levels would no longer appear to increase over time.
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What would happen If I explored two oceanic plates at a convergent boundary?
earthquakes
faults
ocean formation
mountains
volcanoes
island chains
seafloor spreading
Answers
The activity which would happen If I explored two oceanic plates at a convergent boundary is an earthquake.
What is an Earthquake?This is referred to as the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.
At a convergent boundary between two plates of oceanic lithosphere, it has been observed that the older, denser oceanic plate will always subduct, which will cause earthquakes and form volcanic isles thereby making it the correct choice in this scenario.
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how does xylem differ from phloem?
Answers
Answer:
Xylem is different from phloem structurally and functionally
Explanation:
Xylem conducts water and minerals to the leaves where phloem transports the prepared food from leaves to different parts of plant body.
Which characteristics are common to all angiosperms? Check all that apply.
1) Fruits
2) Spores
3) Flowers
4) Nonvascualar tissue
5) Roots
6) Stems
Answers
Answer:
fruits flowers roots and stems
I got it right on edge 2020
Hope this helps :) have a great day!
Explanation:
The characteristics that are common to all angiosperms are fruits, flowers, roots, and stems.
What are Angiosperms?Angiosperms are flowering plants. They are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by characteristics by including flowers, endosperm within the seeds, and the production of fruits that contain the seeds.
The seeds of the angiosperms are found in flowers. They have not produced common types of spores which develop into gametophytes. Angiosperms are not classified under the category of non-vascular tissues plants, as they are flowering plants having vascular seeds.
Therefore, the characteristics that are common to all angiosperms are fruits, flowers, roots, and stems.
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A lake near a large city became polluted due to domestic and industrial waste being released into it. The polluted lake water affected the ecosystem in and around the lake. A group of residents took up an initiative to protect the lake from further pollution. They began a competition among the local residents to design a solution for the problem and to create awareness among the people. Which of these solutions would be the best while making sure economic and social concerns are considered? A. building a treatment plant to treat waste before it is released into the lake B. using eco-friendly products and preventing entry of waste water into the lake C. adding substances to the lake water to dissolve chemical compounds D. cleaning and filtering the lake water regularly using proper equipment
Answers
The best way to solve the problem of water pollution in the lake while making sure economic and social concerns are considered is building a treatment plant to treat waste before it is released into the lake; option A.
What is pollution?Pollution refers to the presence of harmful unwanted substances in the environment.
There are several forms of pollution:
land pollutionwater pollutionair pollutionWater pollution occurs when harmful, substances are introduced into the water by man.
The sources of water pollution include domestic and industrial waste being released into the water. Water pollution makes water unfit for drinking, and swimming, and uninhabitable for aquatic organisms.
Considering the polluted lake near the large city.
The measures for preventing the pollution of the lake include:
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List several factors that may interfere with an embryo's development
Answers
Answer:
Genetic, nutritional, environmental, uteroplacental, and fetal factors have been suggested to influence fetal growth. Uteroplacental and umbilical blood flow and transplacental glucose and fetal insulin are major determinants of fetal growth.
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Silver and gold are common medals used in making jewelry. Why do you think these metals are used?
A. they are ductile and malleable.
B. they have luster.
C. they cannot be dissolved in water.
D. All of above
Answers
Answer:
A. They are ductile and malleable
Explanation:
Although they have luster/shine they can be be dissolved in water and in acid so it can not be all of the above. They are malleable so they can be easily be made into jewelry.
ASAP ASAP ASAP ASAP HELP HELP HELP PLSLSLSLS
Answers
Answer:
You are correct!!
Explanation:
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors
A population of 820 insects lives in a 1.2-acre area. They gather nectar from a population of 560 flowering plants. The plants live in a 0.2-acre area. Which population has greater density, the insects or the plants? Why?
Answers
paul is studying a perspective on human development that emphasizes the relationships between living organisms and their environment. he is most likely studying the .
Answers
Paul's focus on the relationships between living organisms and their environment suggests that he is studying the ecological perspective on human development.
This approach to understanding human development emphasizes the ways in which individuals and their environments interact, and how these interactions shape an individual's physical, social, and cognitive development.
The ecological perspective on human development is rooted in the work of Urie Bronfenbrenner, who developed the ecological systems theory in the 1970s. Bronfenbrenner's theory emphasizes the importance of multiple levels of environmental influence on human development, including the microsystem, mesosystem, exosystem, and macrosystem. The microsystem includes the immediate settings in which an individual interacts, such as the family, school, and peer group.
The mesosystem encompasses the interactions between these different settings, while the exosystem includes broader societal institutions that indirectly affect an individual's development, such as the legal system or media. Finally, the macrosystem refers to the broader cultural and historical context in which development occurs.
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What causes a supernova?
O force of a nebula
O force of a gravity
O energy of heat
O energy of a nebula
Answers
does this an suggest evolutionary relationship? explain how these embryos can be used as evidence of a common ancestor between each of these six organism
Answers
Answer:
Examination of vertebrate embryos reveals that during corresponding stages of early development,
the embryos appear to be very similar. For example, all vertebrate embryos pass through stages in
which they have gill pouches. The pouches eventually develop into the gill apparatus in fish; in laterevolving vertebrates that do not have gills, the gill pouches undergo further refinement and develop
into structures associated with the head and neck. Similarly, all early vertebrate embryos have tails,
which persist in some animals but regress during the later stages of development of humans. Thus,
the individual development of an animal occurs through a series of stages that paint a broad picture
of the evolutionary stages (phylogeny) of the species to which it belongs.
"Ontogeny recapitulates Phylogeny", Haeckel
Explanation:
sure po ito
Examination of vertebrate embryos well-known shows that in corresponding levels of early improvement, the embryos appear very similar.
For example, all vertebrate embryos by skip thru levels in which they have got gill pouches. The pouches subsequently turn into the gill equipment in fish; in later evolving vertebrates that don't have gills, the gill pouches go through similar refinement and develop into systems related to the pinnacle and neck. Similarly, all early vertebrate embryos have tails, which persist in a few animals however regress at some point in the later levels of improvement of humans.What is ontogeny recapitulates phylogeny?These scientists claimed that ontogeny recapitulates phylogeny (ORP). This word shows that an organism's improvement will take it thru every one of the personal levels of its evolutionary history, or its phylogeny.
Thus, the man or woman improvement of an animal happens thru a chain of levels that paint an extensive picture of the evolutionary levels (phylogeny) of the species to which it belongs.
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Ecological Succession is the natural progression of ________ replacement over time
Answers
The process of ecological succession occurs when a region's species and habitat mix shifts through time until a A key idea in ecology is ecological succession.
What exactly is the quiz on ecological succession?Environmental change that is organic, slow, and orderly is called ecological succession. One plant community is gradually replaced by another through ecological processes over time.
Is ecological succession a step-by-step process?The successive emergence and extinction of species within a community throughout time is referred to as succession. In primary succession, living creatures inhabit newly exposed or produced land; in secondary succession, an environment is disturbed and the remains of the preceding community are left behind.
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A physician has a patient with diabetes. Due to a mutation in the patient’s insulin gene, he does not make the insulin protein. In order to treat the patient, the insulin protein will be made in a lab by inserting the human gene for insulin into bacteria. The bacteria will then produce insulin, which will be collected and given to the diabetic patient. Which type of genetic technology is involved in the production of the insulin protein?
Answers
Answer:
I think its circular DNA or plasmid.
Images that you see in your peripheral vision are not as sharp as those directly in front of you because: there is a higher concentration of cone cells in the center of the retina in an area called the fovea. there are fewer rod cells in areas of the retina where images from the periphery are focused. the lens cannot focus images well on areas of the retina where images from the periphery are projected. the rod cells in the periphery are sensitive to blue and green light only.
Answers
Answer:
The correct answer is ''there is a higher concentration of cone cells in the center of the retina in an area called the fovea.''
Explanation:
The fovea, the central area of the macula, is the area of the retina where the vision of details is the most accurate. It is located in the extension of the optic axis of the eye. The fovea is populated only with cones, and allows us the best optical resolution, the field of vision that occurs around the central focus / outside the center of the field of vision (fovea) is known as peripheral vision, it is related to the location and recognition of the visual information that is around the object on which we fix our attention. That is, it is one that uses the peripheral area of the retina and that gives rise to the field of vision that surrounds the point where the sight is fixed / allows us to see the environment that surrounds us in a general way.
blood contains the rhesus protein.
blood does not contain the rhesus protein.
Answers
Answer:
Rh+ blood contains the rhesus protein.
Rh- blood does not contain the rhesus protein.
Explanation:
Answer:
✔ Rh+
blood contains the rhesus protein.
✔ Rh-
blood does not contain the rhesus
Explanation:
just did it on edg 2021 hope this helps
make a food web using 8-10 organisms
Phytoplankton
Zooplankton
Krill
Seaweed
Small Fish
Squid
Crabs
Sea Gull
Shark
Orca
Dolphin
Tuna
Leopard Seal
Penguin
Sea Turtle
Answers
Answer:tuna fish food everything you can do in the i tire did we you fo
Explanation:
with examples discuss principles used to collect, process and analyze statistical data in Agriculture
Answers
Answer:
The principles used to collect, process and analyze statistical data in Agriculture is explained below in details.
Explanation:
There are multiple techniques used to collect or receive data for statistical examination. Three of the most traditional techniques are Direct Observation • Operations and • Surveys. A review petitions data from people; e.g. Gallup surveys; pre-election surveys; marketing reviews. Field data collection facilitates us to gather important information such as the crops farmed, agronomic methods utilized by the farmer, and data on the temporary growth of crops.
the name of Abraham father in the bible
Answers
Answer:
I believe it's Terah
Explanation:
yes and stuff I think so slay
What is the difference between chromosomes, chromatids, and homologous chromosomes?
Answers
Answer:
Sister chromatids are a pair of chromosomes inherited from each parent, while homologous chromosomes are the two parts of a chromosome.
Explanation:
Answer:
Chromosome- form of DNA when it divides
Chromatids- 2 identical chromosomes attatched at a centromere
Homologous- 2 chromosomes with the same structure
Explanation:
Hope this help
Biological Hazards:
I need a brief summary about:
1- Lactobacillus
2- Herpes virus
3- SARS virus
4- Ebola virus
Thank you!
Answers
1- Lactobacillus: Lactobacillus is a type of bacteria that is commonly found in the human gut and in fermented foods.
2- Herpes virus: The herpes virus is a type of virus that causes infections in humans.
3- SARS virus: The SARS virus, or severe acute respiratory syndrome virus, is a type of coronavirus that was first identified in 2002.
4- Ebola virus: The Ebola virus is a type of virus that causes Ebola virus disease, a severe and often fatal illness that affects humans and other primates.
1- Lactobacillus: Lactobacillus is a type of bacteria that is commonly found in the human gut and in fermented foods. It is considered a "good" bacteria, as it helps to maintain a healthy balance of microorganisms in the digestive system and can also aid in the production of certain vitamins. Lactobacillus is often used in probiotic supplements and is generally considered safe for human consumption.
2- Herpes virus: The herpes virus is a type of virus that causes infections in humans. There are several different types of herpes viruses, but the most common are herpes simplex virus type 1 (HSV-1), which typically causes cold sores, and herpes simplex virus type 2 (HSV-2), which typically causes genital herpes. Herpes viruses are highly contagious and can be spread through close personal contact, such as kissing or sexual contact.
3- SARS virus: The SARS virus, or severe acute respiratory syndrome virus, is a type of coronavirus that was first identified in 2002. It causes a severe respiratory illness that can be fatal in some cases. The SARS virus is thought to have originated in bats and was transmitted to humans through an intermediate host, likely civet cats. The SARS outbreak was contained in 2003, but the virus is still considered a potential threat to public health.
4- Ebola virus: The Ebola virus is a type of virus that causes Ebola virus disease, a severe and often fatal illness that affects humans and other primates. The Ebola virus is transmitted through contact with the bodily fluids of an infected person or animal, and can cause symptoms such as fever, vomiting, diarrhea, and internal bleeding. There have been several outbreaks of Ebola virus disease in Africa, including a major outbreak in 2014-2016 that resulted in over 11,000 deaths.
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Is there more protons or neutrons in the stable isotope?
Please help
Answers
Answer:
There are more protons in neutrons in a stable isotope.
Explanation:
There are more protons in a stable isotope because protons are more stable than nuetrons. Protons are lighter, while neutrons tend to be able to decay into a proton, electron to conserve charge, and an electron anti-neutrino lepton number. Because these things have a total mass that is less than the original nuetron, in the process it results in emitting energy. Overall, a proton has the lowest mass of any baryon; there is nothing left that is could possibly decay into unless the baryon number is destroyed. Which by laws and theories, seems to not be permitted. To give more information, the first two elements, hydrogen and helium, have stable isotopes where there is one less neutron than the number of protons. All of the elements do not contain a stable isotope that consists of this property.
5. Aristotle was the first to attempt to classify all the kinds of animals in his History of Animals. He grouped the types of creatures according to their
similarities: animals with blood and animals without blood, animals that live on water and animals that live on land. His system of classification was not
evolutionary, and the various species on the ladder had no genetic relationship to each other. Aristotle regarded the essence of species as fixed and
unchanging, and this view persisted for the next two thousand years.
After Aristotle, there was great interest in naming these new species and fitting them into the existing classifications. Leading to new systems of
classification being developed by various scientists. One such system was developed by Carl Linnaeus. By the time Linnaeus was born, there were many
systems of botanical classification in use. This, in fact, was the problem - there were too many inconsistent systems, and the same plant might have
several different scientific names. He published his most innovative work as a young man in 1735- The System of Nature. The System of Nature is notable
for an overall framework of classification that organized all plants and animals from the level of kingdoms all the way down to species. This system of
classification, although greatly modified, is essentially the one we use today.
Which of the following statements best explains why the changes we have made in our scientific system of classification are important to the scientific
community?
There is a common understanding in the classification of organisms.
All scientist will have a common system for the classification of locations containing fossils.
All members of the community understand how other scientists classify predator-prey relationships.
All members of the scientific community will use a similar system to classify the impact of removing species from ecosystems.
Activate Wind
Go to Settings to
Answers
Answer:
it is important because it helps us to identify the specific and generic name of organism
PLEASE HELP!! During what phase does the spindle fibers break down!!!
Answers
Answer:
During Telophase.
Explanation:
A student observes several slides with different cell types under a microscope.
Slide
Type of Cells
Slide 1 Liver cell of a mouse
Slide 2 Sperm cell of a human
Slide 3 Skin cells of a human
Slide 4 Egg cells of a mouse
Which pair of slides contains cells that resulted from meiosis?
O Slide 1 and Slide 3
O Slide 2 and Slide 4
O Slide 2 and Slide 3
Slide 1 and Slide 4
Answers
Answer:
The slides containing cells resulting from meiosis are slides 2 and 4.
Explanation:
The cells on slide two are human sperm, while on slide four are mouse eggs. Both sperm and eggs are sex cells or gametes, produced through meiosis.
Meiosis is the mechanism of reductional cell division that serves to obtain gametes, a process called gametogenesis. In meiosis, four haploid daughter cells, the gametes, are obtained from a diploid cell.
The other options (slides) are not correct because :
Mouse liver and human skin cells are somatic cells, produced by mitosis.which of the following best describes the stability of terrestrial biomes?
Answers
The stability of terrestrial biomes can be described as relatively stable but also sensitive to disturbances.
Terrestrial biomes, such as forests, grasslands, deserts, and tundra, have evolved over thousands of years to maintain a balance of ecosystems within them. This balance is often maintained through interactions between the plants, animals, and the physical environment of the biome. However, these biomes can also be sensitive to disturbances such as climate change, deforestation, pollution, and human development.
These disturbances can disrupt the delicate balance of the biome, leading to changes in the species composition and overall functioning of the ecosystem. Therefore, while terrestrial biomes may appear stable, they are also vulnerable to human impacts and natural disasters, making their conservation and management essential for the long-term health of the planet.
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Which of the following natural processes caused rocks and other surfaces to be broken down by freezing and expanding of ice?
Chemical weathering
Deposition
Erosion
Mechanical weathering
Answers
Answer:
The answer is mechanical weathering
Explanation:
I took the test and I got it correct
Answer:
chemical weathering
Explanation:
All animals have eukaryotic cells and are
a
invertebrates
b
asexual
c
multicellular
d
vertebrates
Answers
Answer:
c multicellular
Explanation:
All of the following are needed for photosynthesis to occur EXCEPT
Select one:
a. carbon dioxide
b. sunlight
c. water
d. glucose
Answers
so u don’t need glucose