11. Which of these cells is responsible for cell-mediated immunity?
A. B lymphocyte
B. plasma cell
C. T lymphocyte
D. phagocyte
12. Which of the following is true of antibodies?
A. They are made by B lymphocytes.
B. They are made by Helper T lymphocytes.
C. They are made by Killer T lymphocytes.
D. They are made by macrophages.
13. Which cells produce chemicals that cause the other parts of the immune system to function?
A. B lymphocytes
B. Helper T lymphocytes
C. Killer T lymphocytes
D. plasma cells
14. Which of the following remain after recovering from an infection and provide immunity?
A. memory cells
B. phagocytes
C. macrophages
D. plasma cells
15. Which of the following immune system cells are the hosts for HIV?
A. B lymphocytes
B. Helper T lymphocytes
C. Killer T lymphocytes
D. plasma cells
16. Which of these is an example of natural active immunity?
A. immunity after receiving a vaccination
B. immunity after recovering from a pathogen infection
C. a baby's immunity resulting from antibodies from its mother
D. None of these choices is correct.
17. Which of the following best explains how vaccinations result in ACTIVE immunity?
A. The vaccination causes a primary immune response and memory cells are retained for life.
B. The vaccination contains antibodies.
C. The vaccination contains lymphocytes from horses.
D. None of these choices is correct.
18. Which of the following practices contributes to bacteria that have resistance to antibiotics?
A. Prescribing antibiotics for diseases that are not caused by bacteria.
B. Self prescribing of antibiotics by people whenever they are ill.
C. Patients stop taking prescribed antibiotics when they begin to feel better instead of finishing the prescription.
D. All of these choices are correct.
19. Which of the following can result in an endemic disease becoming an epidemic?
A. The health of the host population is reduced by overcrowding or stress.
B. There is a drastic increase in the population of the vector of the pathogen.
C. The pathogen mutates to a more dangerous form.
D. All of these choices are correct.
20. What is the name for a disease outbreak that spans several continents or the entire world?
A. an endemic
B. an epidemic
C. a pandemic
D. All of these choices are correct.
Answers
11. T lymphocyte
12. B lymphocyte
13. T helper lymphocyte
14. memory cells
15. helper t lymphocyte
16. B
17. D
18. C
19. D (not sure)
20. C
Related Questions
Which of the following is NOT a true statement regarding exocytosis?
A
It forms intracellular vesicles from inward folding of the plasma membrane.
B
It requires fusion of vesicles with the plasma membrane.
C
It secretes large molecules out of the cell.
D
It is responsible for removing large waste particles that cannot be recycled by the cell.
Answers
Exocytosis is a cellular mechanism by which cells secrete products outside the cell via vesicles that fuse with the plasma membrane. Here option D is the correct answer.
The products can range from proteins to waste products. Large molecules are also secreted via exocytosis. Exocytosis is responsible for adding components to the cell membrane and secreting macromolecules.
The other options are true statements regarding exocytosis: A is a true statement regarding exocytosis. Intracellular vesicles are formed by the inward folding of the plasma membrane.
B is a true statement regarding exocytosis. Fusion of vesicles with the plasma membrane is required for exocytosis to occur. C is a true statement regarding exocytosis. It secretes large molecules out of the cell. Therefore option D is the correct answer.
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The discovery of mitochondrial DNA (mtDNA) had no effect on which area of scientific investigation?
endosymbiotic theory
inheritance research
forensic science
study of cork bark
Answers
Answer:
D cork bark
Explanation:
its right e2020
The discovery of mitochondrial DNA (mtDNA) had no effect on the study of cork bark of scientific investigation. The correct option is D.
What is mitochondrial DNA?Mitochondrial DNA is a type of circular DNA that is present in the mitochondrial. Mitochondria is an organelle of cells that is the main organ for the store of energy in the form of ATP.
Mitochondrial DNA has some different functions like they are having many copies, a high mutation rate and maternal inheritance which means it only came from the mother side in the offspring.
This DNA has great importance in synthesizing some enzymes and proteins for the function and pathways of the energy synthesized in the mitochondria.
Thus, the correct option is D. study of cork bark.
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Behind your house, there's a gorgeous pond filled with frogs. You notice that the frogs behind Mr. Archer's house often have three legs. You start wondering if the fertilizer that Mr. Archer uses for his lawn is causing the deformities in the frogs. You collect 10 frogs and put the special fertilizer in their container (Group A). You put another 10 frogs and place them in a different container with just water (Group B). A week later, 7 out of 10 of the frogs in group A grew only three legs. The frogs in group B grew four legs.
What is the independent variable?
Answers
Do cells use carbohydrates as a source of amnio acids
Answers
Answer:
Yes sssdddddsdsssss
Explanation:
tutututytytututuytutyrut
On what factors does numbers of sweaters a factory owner produces depend?
Answers
They are employed in the creation of goods and services. Land, labor, capital, and entrepreneurship are the four categories of components of factory production that economics distinguish between.
What are the four production factors used for?The factors of production are the resources needed to produce a good or service in order to earn money. The four elements of production are land, labor, capital, and entrepreneurialism, according to economists. An economy could be said to be built on them.
What are the four production factors?Land, labor, capital, and entrepreneurship are the four categories into which economists generally divide the components of production. Natural resources are referred to as "land," "labor" is defined as "work effort,” and "capital" is everything created that is used to create anything else.
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In what ways does a compound differ from its component elements?
Answers
Answer:
The physical and chemical properties of a compound differ from its component elements.
Explanation:
the hydrologic cycle requires an excess of evaporation
Answers
The hydrologic cycle does not require an excess of evaporation; instead, it relies on a balanced and continuous process of evaporation and precipitation.
The hydrologic cycle, or the water cycle, is a continuous and balanced process through which water circulates on Earth. It involves several interconnected stages, including evaporation, condensation, precipitation, and runoff. It does not require an excess of evaporation but rather relies on a dynamic equilibrium between evaporation and precipitation. Evaporation occurs when water changes from its liquid state to a vapor or gas form, primarily from water bodies such as oceans, lakes, and rivers. This vapor rises into the atmosphere. Subsequently, condensation takes place as the water vapor cools and transforms back into liquid droplets, forming clouds. These clouds eventually release moisture through precipitation, which can occur as rain, snow, sleet, or hail. Precipitation replenishes the Earth's water sources, such as rivers, lakes, and groundwater, and completes the hydrologic cycle. The hydrologic cycle is a fundamental process that sustains life on Earth by ensuring a continuous supply of fresh water. It is a balanced system where evaporation and precipitation occur in harmony, maintaining the overall distribution and availability of water resources.
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Which row accurately represents photosynthesis when substituted into the equation?
1
2
3
4
Answers
In the light-dependent reaction of photosynthesis, water \((H_2O)\) is split into oxygen \((O_2)\), hydrogen ions (H+), and electrons (e-), which are then used to generate ATP and NADPH. This can be represented by the following equation:
\(2H_2O +\ light energy\ - > 2H+ + O_2 + 2e-\)
The generated H+ and e- are used to create a proton gradient across the thylakoid membrane, which is then used by ATP synthase to produce ATP. Similarly, the e- and H+ are used by NADP+ reductase to reduce NADP+ to NADPH. Overall, this process converts light energy into chemical energy in the form of ATP and NADPH, which are then used in light-independent reactions to produce organic molecules.
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--The complete Question is, What accurately represents photosynthesis when substituted into the equation for the light-dependent reaction?
(Note: The light-dependent reaction of photosynthesis involves the conversion of light energy into chemical energy in the form of ATP and NADPH, which are used in the subsequent light-independent reaction to produce organic molecules.) --
If clouds and ice reflect or send back
extra wave lengths, what can you
hypothesize can happen as we continue
to increase global temperatures?
Answers
Answer:
Wave lengths will shorten (become less extra)
Explanation: Less clouds and ice will be here once the temperature increases to where ice melts and there isn't enough water to form clouds. Meaning that there wont be extra wave lengths
help extra points rellay important
Answers
Answer:
Option A, Saliva
Explanation:
a.) Saliva = watery fluid, secreted into the mouth by the salivary glands, that functions in the tasting, chewing, and swallowing of food.
b.) Mucus = a thick liquid produced inside the nose and other parts of the body.
c.) The Tongue = the large, soft piece of flesh in the mouth that you can move, and is used for tasting, speaking.
d.) The Epiglottis = a thin cartilaginous flap that covers the entrance to the larynx during swallowing, preventing food from entering the trachea.
Hope this helps!
Answer: A
Explanation: Have a great day!!
17. How does propelling themselves out of the water most likely help flying fish
survive in their environment?
A) by helping them escape predators
B) by helping them breathe in oxygen
C) by helping them find food sources
D) by helping them avoid boats and ships
Answers
Answer:
A. By helping them escape predators .
Explanation:
They can also breathe underwater and there are many other food sources underwater. They can avoid boats and ships by just swimming away.
In a Friday night baseball game, the pitcher throws balls an average of 94 miles per hour. which of the following data (shown in miles per hour) would show the most precision
A) 89,91,90,91
B) 95,97,93,91
C)92,98,96,90
D)90,92,94,95
Answers
95 + 97 + 93+ 91 = 376
376 divided by 4 = 94
Average formula = add all values together and divided by the amount of values in the equation
Mark brainliest plz!
Answer:
B)95,97,93,91 thats the correct answer
why the circulatory system is considered to be a closed system?
Answers
Explanation:
human have closed circulatory system. this means blood is always enclosed in the vessels and the heart while circulating throughout the body IN this type of system blood is pumped by heart through arteries and veins and does not fill the body cavities thats why the circulatory system is considered to be a closed system
why is dna synthesis expected to be more complex in eukaryotes than in bacteria? check all that apply. why is dna synthesis expected to be more complex in eukaryotes than in bacteria?check all that apply. dna replication in eukaryotes is known to proceed with much more fidelity than in bacteria. there is a high occurrence of regions with unusual dna structure in eukaryotic chromosomes. eukaryotic cells contain much more dna. eukaryotic chromosomes are linear rather than circular. in eukaryotic cells, dna is complexed with histones. there are fewer dna polymerase molecules per cell in eukaryotes compared to bacteria.
Answers
The synthesis of DNA is expected to be more complex in eukaryotes than in bacteria for the following reasons: a) DNA replication in eukaryotes is known to proceed with much more fidelity than in bacteria; b) there is a high occurrence of regions with unusual DNA structure in eukaryotic chromosomes; c) eukaryotic cells contain much more DNA; d) eukaryotic chromosomes are linear rather than circular; and e) in eukaryotic cells, DNA is complexed with histones.
The increased complexity of DNA synthesis in eukaryotes is due in large part to their larger genomes and the higher fidelity of DNA replication in eukaryotes. Compared to bacteria, eukaryotes have much more DNA, which must be replicated accurately.
The regions with unusual DNA structure in eukaryotic chromosomes also add to the complexity of DNA synthesis, since these areas must be replicated accurately and with more precision.
Eukaryotic chromosomes are also linear rather than circular, making it more difficult to accurately synthesize DNA. Furthermore, DNA in eukaryotic cells is complexed with histones, adding another layer of complexity.
Finally, there are fewer DNA polymerase molecules per cell in eukaryotes compared to bacteria, which further contributes to the complexity of DNA synthesis. In bacteria, there is a much higher concentration of DNA polymerase molecules, which allows for quicker and more efficient DNA replication.
However, in eukaryotes, the concentration of DNA polymerase molecules is much lower, making it more difficult to accurately synthesize DNA.
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Question 3 (1 point)
Put these steps of the Scientific Method in the correct order.
Reorder answers
1.Ask a question
Reorder answers
2.Analyze data
Reorder answers
3.Form a hypothesis
Reorder answers
4.Perform experiment
Answers
1. Ask a question
2. Form a hypothesis
3. Analyze data
I hope this helps! This should be correct.
sequence read 3 was synthesized by sequencing which strand of dna? neither 5' --> 3' and 3' --> 5' strands 3' --> 5' strand both 5' --> 3' and 3' --> 5' strands 5' --> 3' strand
Answers
Sequence read 3 was synthesized by sequencing 5' --> 3' strand of DNA (Option D).
What is DNA sequencing?DNA sequencing is a technique used to find out the precise order of nucleotides (Adenine, Guanine, Cytosine, Thymine) in a DNA molecule. In other words, it is the method of decoding the DNA sequence. The determination of DNA sequence has numerous applications in various fields such as molecular biology, genetics, evolutionary biology, forensic science, medical diagnosis, and drug discovery.
In the case of DNA sequencing, the DNA molecule is synthesized in the 5' --> 3' direction. So, the DNA sequence is also written in the 5' --> 3' direction. Sequence read 3 (SR3) is one of the several DNA sequence reads obtained by the sequencing method. Sequence read 3 was synthesized by sequencing the 5' --> 3' strand of DNA.
Therefore, the correct option is 5' --> 3' strand (Option D).
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The job of hemoglobin is to
Answers
Answer:
Hemoglobin is for transferring oxygen in your blood from the lungs to the tissues.
Answer:
Hemoglobin is a protein with a quaternary structure, consisting of four subunits.
Scientists have found a gene that makes a protein
called PKG that controls certain behaviors in
many types of ants. The soldier ant will help
collect food when it has a low level of PKG.
When it has a high level of PKG, the soldier ant
will protect and defend its colony. Soldier ants
that are given PKG are more likely to ignore food
sources and attack intruders. Which conclusion
can best be made from this information?
Answers
Answer:
The conclusion that can best be made from this information is that the PKG gene and protein play a significant role in regulating the behavior of soldier ants. Specifically, the level of PKG in a soldier ant determines whether it will focus on food collection or colony defense, and the administration of PKG can alter their behavior accordingly. This discovery provides insights into the genetic and molecular mechanisms that underlie social behavior in ants, and may have implications for understanding similar behavior patterns in other animals.
20 POINTS EASY PUNNETT SQUARES PLS HELP
(The questions are in the picture. Please answer all question to get the points)
Answers
Answer:
See file below
Explanation:
See file below
let me know if this helped by hitting thanks or brainliest! if not, please comment and I'll get back ASAP.
the thick mucus secreted by the tissues lining the respiratory passages is known as
Answers
Which of the following about the examples of epithelial morphology that affects the rate e diffusion is TRUE? a) Cilia increase the thickness of the membrane and thus increase the diffusi rate. Ob) Cilia increase the surface area of the membrane and thus increase the diffusion rate. c) Cilia and microvilli both increase the surface area of the membrane and the increase the diffusion rate. d) Microvilli increase the surface area of the membrane and thus increase the diffusion rate. e) Microvilli generate fluid flow over the cell surface and thus increase the diffusion rate. Treatment of ouabain cell volume because a) increases; more aquoporins are added to cell membrane via exocytosis increasing water influx b) decreases; more Na+ ions are accumulated outside cells, increasing intracellular osmolarity c) has no effect on; water can freely move through the cell membrane d) decreases; more aquperins are transported to the cell membrane, incre water efflux e) increases; more Na+ ions are accumulated inside the cells, increasing intracellular osmolarity Use Fick's law of diffusion to briefly explain how their morphological characteristic and function are MATCHED in exchange epithelial cells.
Answers
Microvilli increase the surface area of the membrane, leading to an increased diffusion rate.
The correct answer is: d) Microvilli increase the surface area of the membrane and thus increase the diffusion rate.
Explanation: Microvilli are finger-like projections found on the surface of epithelial cells. They increase the surface area of the cell membrane, which enhances the diffusion rate of molecules across the membrane. This increased surface area allows for more efficient exchange of substances, such as nutrients and waste products, between the cell and its surroundings.
Regarding the treatment of ouabain and its effect on cell volume, the correct answer is: b) decreases; more Na+ ions are accumulated outside cells, increasing intracellular osmolarity.
Explanation: Ouabain is a substance that inhibits the Na+/K+ ATPase pump, leading to an accumulation of Na+ ions outside the cells. This disrupts the normal ion balance and increases the intracellular osmolarity. As a result, water moves out of the cells, causing a decrease in cell volume.
Fick's law of diffusion states that the rate of diffusion is directly proportional to the surface area, concentration gradient, and permeability of the membrane, while inversely proportional to the thickness of the membrane. In the case of exchange epithelial cells, their morphological characteristic of having microvilli increases the surface area of the membrane, allowing for more efficient diffusion of molecules. This matches their function of facilitating the exchange of substances across the epithelial layer.
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what is the functions of genotypes???
Answers
Answer:
The genotype of an organism is its complete set of genetic material, two alleles are inherited for a particular gene by your parents sex gametes (sperm + egg). the genotype determines the persons phenotype eg. polydactyly, your eye colour etc, with a recessive or dominant allele. this can be determined through punnet squares too.
Which environment will most likely result in the formation of marble?
O a bog in which dead plants and animals have collected over a very long period of time
O a shallow cavity formed by the evaporation of a lake leaving behind multicolored deposits
O a valley carved by a glacier which left behind rock fragments of various sizes and types
O an area deep underground where limestone has been exposed to intense pressure
Answers
Marble can be found from one side of the planet to the other, however, the four nations where it is most chiefs are Italy, Spain, India, and China.
The answer is an option(A)-O a bog in which dead plants and animals have collected over a very long period of time
Marbles frequently happen interbedded with such transformative rocks as mica schists, phyllites, gneisses, and granulites and are most normal in the more established layers of Earth's covering that have been profoundly covered in districts of outrageous collapsing and volcanic interruption.
Marble is a stone coming about because of the transformation of sedimentary carbonate rocks, most regularly limestone or dolomite (rock). The transformation causes variable recrystallization of the first carbonate mineral grains. The subsequent marble rock is ordinarily made out of an interlocking mosaic of carbonate precious stones.
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which of the following statements is not true concerning peptidyl transferase? group of answer choices it catalyzes peptide bond formation. it requires no outside source of additional energy, such as atp. it is a ribozyme having catalytic activity. it is associated with the large subunit of ribosomes. it moves the ribosome, so translation continues.
Answers
The statement that is not true concerning peptidyl transferase is "it moves the ribosome, so translation continues" because peptidyl transferase plays no role in moving the ribosomes. Option d
Peptidyl transferase is responsible for catalyzing the formation of peptide bonds between amino acids during protein synthesis, and it is associated with the large subunit of ribosomes.
However, it does not move the ribosome; rather, the ribosome moves along the mRNA molecule as the process of translation continues.
Additionally, peptidyl transferase does not require an outside source of energy, such as ATP, and it is indeed a ribozyme with catalytic activity.
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how does the different types of cells that make up the non-specific immunity team work together?
Answers
Answer:
non-specific immune cell is an immune cell (such as a macrophage, neutrophil, or dendritic cell) that responds to many antigens, not just one antigen. Non-specific immune cells function in the first line of defense against infection or injury.
When the energy needs of the body cannot be met in any other way, the last resort of the body is to ______________________.
Answers
Answer:
Catabolysis
Explanation:
Catabolysis is the last metabolic resort for the body to keep itself — particularly the nervous system—functional. Protein stores, especially in muscle tissue, provide the amino acids needed for the process.
PLEASE CAN SOMEONE HELP? ITS DUE TODAY!!
Answers
The abiotic factors will define which organisms are able or not to live in a specified place. The living organisms will constitute the biotic factors, which define if and how can an organism live in a specified environment. So, the abiotic factors are controlling the biotic factors of an environment. Factors like snow, and rain can determine if the animal belongs there.
Scientists have found that certain genes become turned on or off as a result of exercise mainly through a process called ________, in which tiny atoms attached themselves to the outside of a gene.
Answers
Scientists have found that certain genes become turned on or off as a result of exercise mainly through a process called methylation.
What does methylation do in the body?The methylation cycle is a type of cycle that helps us to do function of both physically and mentally. Many different functions in the body use this methylation process such as nervous, cardiovascular and immune system activity, energy production, heavy-metal detoxification and hormone balance. There are certain genes which become turned on or off when we do exercise, this process is known as methylation.
So we can conclude that Scientists have found that certain genes become turned on or off as a result of exercise mainly through a process called methylation.
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All living things...
A. are made of cells.
B. function basically the same.
C. are similar in design.
Answers
Which structure filters the blood to create the filtrate, which normally contains water, urea, and electrolytes?.
Answers
Kidneys filters the blood to create the filtrate, which normally contains water, urea, and electrolytes.
The kidneys are two reddish-brown, bean-shaped organs found in vertebrates. They are located on the left and right sides of the retroperitoneal space and measure around 12 centimetres in length in mature humans.
The regulation of fluid osmolality, acid-base balance, various electrolyte concentrations, and volume of various body fluids are all functions of the kidney. The glomerulus, where filtering occurs, filters one-fifth of the blood volume that enters the kidneys.
Reabsorbed substances include amino acids, salt, bicarbonate, glucose, and water that doesn't contain any solutes. Chemicals discharged include hydrogen, ammonium, potassium, and uric acid, to name a few. The nephron is the structural and functional unit of the kidney.
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