I just turned in my assignment. The correct answer is "badly".
So:
He acted very badly.
B. rectum.
C. cecum.
D. large intestine.
immune system and are why vaccines work.
Answer:
True.
Explanation:
Memory cells and antibodies are indeed essential components of the acquired immune system, and they play a crucial role in the effectiveness of vaccines. Memory cells are specialized immune cells that "remember" previous encounters with pathogens. When the body is exposed to the same pathogen again, memory cells facilitate a quicker and stronger immune response, leading to faster clearance of the infection. Antibodies, on the other hand, are proteins produced by the immune system in response to foreign substances (antigens), such as those present in pathogens. Antibodies help neutralize or eliminate the pathogens, preventing the infection from spreading.
Vaccines work by stimulating the immune system to produce memory cells and antibodies against a specific pathogen without causing the actual disease. This prepares the immune system to respond rapidly and effectively if the person is exposed to the actual pathogen in the future.
True. Memory cells and antibodies are essential parts of the acquired immune system and are why vaccines work.
The acquired immune system is a complex defense mechanism that protects the body from pathogens. It consists of specialized cells and molecules that work together to recognize and eliminate foreign invaders. Two essential components of the acquired immune system are memory cells and antibodies.
Memory cells are a type of white blood cell that are formed after an initial exposure to a pathogen. They 'remember' the pathogen and allow for a faster and more effective immune response upon subsequent exposures. When the body encounters the same pathogen again, memory cells quickly recognize it and initiate a targeted immune response, preventing the pathogen from causing a full-blown infection.
Antibodies, also known as immunoglobulins, are proteins produced by the immune system in response to the presence of a specific pathogen. They bind to the pathogen and help neutralize or eliminate it from the body. Antibodies can recognize and bind to specific molecules on the surface of pathogens, marking them for destruction by other immune cells or neutralizing their harmful effects.
Vaccines work by stimulating the production of memory cells and antibodies without causing the full-blown disease. They contain weakened or inactivated forms of pathogens or specific components of pathogens. When a vaccine is administered, the immune system recognizes these components as foreign and mounts an immune response, producing memory cells and antibodies specific to the pathogen. This provides immunity against the pathogen, so if the person is later exposed to the actual pathogen, their immune system can respond rapidly and effectively, preventing or reducing the severity of the infection.
Learn more about memory cells, antibodies, and the acquired immune system here:
#SPJ14
B. codominance
C. heterozygous
D. incomplete dominance
Answer: B). Codominance
Explanation:
2:1
3:1
none of the above
The real correct answer would be 3:1
Since the other answer is completely incorrect, and this one is correct, I would really appreciate it if this one got brainliest! :)
The evolutionary mechanisms might account for the origin and persistence of cell-to-cell signaling in unicellular prokaryote - quorum sensing
It is Phenomena by which the bacteria can detect the specific stimuli and respond towards the cell population density. It helps in coordinating gene expression andis used in prokaryotes for cell to cell signaling and cell communication.
The main evolution of quorum sensing in bacteria was to relay the information and help in cell signaling by releasing specific toxins. These prokaryotic organisms that are capable of quorum sensing would survive more in their environment, adapt well in their environment.
Learn more about quorum sensing:
The origin and persistence of cell-to-cell signaling in unicellular prokaryotes can be attributed to natural selection, where the ability to communicate provided a survival advantage. Such communication, primarily seen within the same species, facilitated processes like mating and nutrient sensing. This function was further essential in the evolution of multicellular life forms.
The evolutionary mechanisms that might account for the origin and persistence of cell-to-cell signaling in unicellular prokaryotes include natural selection and horizontal gene transfer (HGT).
The first life on Earth comprised of simple single-celled prokaryotic organisms with limited interaction capabilities. However, to adapt and survive in different environmental conditions, these organisms developed a mechanism of signaling within the same species. External signaling also occurs between different species but is limited compared to within-species communication.
Yeasts and bacteria, for instance, signal each other to aid in processes such as mating, nutrient sensing, and social behaviours like forming large complexes called biofilms.
The necessity of cellular communication became even more crucial with the evolution of multicellular organisms. Thus, the ability to communicate through chemical signals that originated in single cells was integral to the evolution of multicellular life forms.
Scientific consensus proposes that metabolically interactive prokaryotic communities may have facilitated the emergence of eukaryotic cells. Hence, the efficiency of these communication systems was pivotal for the diversity and functionality of all life forms as we know it.