We are not in a state of continuous infection from microbes we encounter every day as : the immune system provides an overlapping network of host defenses.
What is meant by immune system?The immune system protects your body from outside invaders that may include germs such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). A healthy immune system protects by creating a barrier that stops those invaders or antigens from entering the body.
The immune system's job is to defend against disease-causing microorganisms and it's goal is to keep us healthy. The immune system is a vast and complex interconnected network of different organs, cells and proteins that work together to protect the body from illness.
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when an hfr e. coli cell engages in conjugation with an f- cell, what will be transferred to the recipient cell if the conjugation bridge is broken after 20 minutes?
When an Hfr E. coli cell engages in conjugation with f- cell, then part of the F plasmid and portion of the bacterial chromosome is transferred to the recipient cell if the conjugation bridge is broken after 20 minutes.
What do you know about Hfr E.coli?High-frequency recombination(Hfr) cell is a bacterium with a conjugative plasmid integrated into its chromosomal DNA and the integration of plasmid in the cell's chromosome is through homologous recombination.
After the cross between Hfr cell and F- cell, recipient cell remains recipient and in this conjugation, chromosomal DNA is transferred from donor to recipient cell with the portion of F- factor. Therefore, the frequency of recombination is high.
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If there were one trna for every codon that codes for an amino acid, how many different trnas should there be?.
There must be 61 different tRNAs There must be different tRNAs A codon only functions when coding if a tRNA with a complementary anticodon is also found in the same cell and must supply the corresponding amino acid increase
Since most of the 61 sense codons have their own tRNAs in the eukaryotic cytosol, most cells have 40-60 different tRNAs. tRNAs that accept the same amino acid are called iso-accepting tRNAs. Human mitochondria have only 22 different tRNAs, and plant chloroplasts have about 30 different tRNAs. An enzyme that combines specific amino acids. Organisms use up to 20 tRNA synthetases to make aminoacyl tRNAs, one for each of the 20 canonical amino acids. tRNA forms both normal base pairs (5'-UUC-3' codon with 3'-AAG-5' anticodon) and atypical base pairs with the 3rd codon position so it can bind to both codons. (5'-UUU-3'-codon and 3'-AAG-5'-anticodon).
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if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
secondary type of succession would follow, if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact.
The life cycle of a plant is characterized by secondary ecological forest fire succession. Secondary succession, as opposed to the first, primary succession, is a process initiated by an event (e.g. forest fire, harvesting, hurricane, etc.) massive wildfires were raging. The alterations that occurred after the California fires are an illustration of secondary succession. The sequence of alterations known as secondary succession take place in an environment that has been disrupted but where soil and organisms are still present.
The complete question is
If a forest fire destroyed the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
a. primary
b. secondary
c. tertiary
d. quaternary
e. quinary
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Suppose a true-breeding orange flower is crossed with a true-breeding purple flower. In the next generation, all of the flowers are
purple.
What does this outcome tell you about the allele for orange flowers?
O The orange allele is dominant to the purple allele
O The orange allele shows incomplete dominance.
O The orange allele is recessive to the purple allele
O The orange allele is sex-linked
Answer: The orange allele is recessive to the purple allele.
epithelial cell abnormality atypical squamous cells of undetermined significance.T/F
epithelial cell abnormality atypical squamous cells of undetermined significance true
The most usual aberrant finding on a Pap test is atypical squamous cells with unknown significance. It might indicate an infection with specific strains of the human papillomavirus (HPV) or another infection, like a yeast infection.Can unclear significance atypical squamous cells be cancer?
Undetermined significance atypical squamous cells (ASC-US) — With ASC-US, the chance of cervical cancer is less than 1%, while the risk of a high-grade precancerous lesion (cells with a moderate to high risk of evolving into cervical cancer) is as high as 7%.
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does caffeine work through a cns effect or a metabolic effect? what drawback is there for caffeine use?
Yes, It is true that caffeine work through CNS or a metabolic effect. Caffeine can have adverse effects such as restlessness, headaches, insomnia, nervous irritability and premature left-ventricular contractions.
What are some CNS effects of caffeine?Caffeine increases energy metabolism throughout the brain but decreases cerebral blood flow inducing relative brain hypoperfusion. Caffeine activates noradrenaline neurons that affects the local release of dopamine.
Caffeine/coffee stimulates the metabolic rate in control and obese individuals. Long-term effects of caffeine include chronic insomnia, constant anxiety, depression, and stomach problems and it can also cause high blood pressure. In high doses, caffeine can have severe effects on brain, heart and muscle function.
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A new organism, Organism E, has been discovered. How could scientists use its DNA to compare and classify this new organism?
Scientists can use DNA sequences to help determine if they have discovered a new species. They can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.
What is Species?Species may be defined as the collection of organisms that can significantly reproduce with one another in nature in order to produce fertile offspring.
Scientists can also sequence huge chunks of genetic information among different organisms and then compare them to one another. When they do this, they look for strands of DNA -- or RNA or proteins -- that exhibit homologous sequences, or sequences with similar genes on them.
Therefore, scientists use the mechanism of DNA sequencing in order to compare and classify this new organism E.
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How do diffusion and osmosis help amoebas survive?
How do diffusion and osmosis limit the size of a cell?
By diffusion and osmosis removing their wastes and supplying them with useful substances help amoebas in survive.
How does diffusion and osmosis help a cell survive?Human existence depends on diffusion and osmosis because they enable cells to passively absorb nutrients and expel waste. This is due to the fact that osmosis and diffusion both entail the net movement of molecules along concentration gradients and as a result, they don't need any energy input to proceed.
Amoeba is assisted in surviving by diffusion and osmosis, which remove their waste and provide them with nutrients. Osmosis and diffusion are both passive processes, meaning they don't need the energy to work.
The maximum size that a single cell may grow to is constrained by diffusion, which only works over a certain distance. Any food and waste requirements of a single-celled microbe, such as an amoeba, may be met through diffusion.
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The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to
The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to describe how nervous they look.
A drivers test is important for you to receive your permit within the country. Only with a legitimate permit are you able to ride or drive your two-wheeler and hackney coach in Republic of India. A drivers test contains of a theory half beside a sensible assessment likewise.
To not feel nervous while giving the drivers test, read through and con rules, road sign symbols, and different data which will be necessary to grasp throughout your take a test and this may take a bit of the nervousness away as a result of you’ll be mentally ready to pass the take a look at.
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ascending pathways conduct sensory information upward toward the brain, typically through a relay chain of 3 successive neurons. the neurons in these sensory pathways are called the first-order, second-order and third-order neurons, respectively. select the true statement regarding first-order neurons in somatosensory pathways.
Ascending pathways in ganglions, which contain the cell bodies of first-order neurons, transmit sensory data to the brain, typically via a relay chain of three succeeding neurons.
What exactly are neurons and what do they do?The fundamental constituents of the brain are neuronal cells, commonly referred to as neurones or nerve cells. They are indeed the cells in charge of absorbing sensory data from the environment, directing our muscles with motor commands, and transforming and relaying electrical impulses at each step along the route.
Are neurons restricted to the brain?The brain's neurons are the cells responsible for transmitting and receiving electrical and chemical messages. They serve as the brain's building blocks and carry signals to all of the body's tissues, muscles, and other neurons.
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in eukaryotic cells, the processes of protein synthesis occur in different cellular locations.
The method by which proteins are created is known as protein synthesis. DNA to RNA transcription takes place in the nucleus of eukaryotic cells.
In eukaryotic cells, what is protein synthesis?The method by which proteins are created is known as protein synthesis. DNA to RNA transcription takes place in the nucleus of eukaryotic cells. Following this, the mRNA strand leaves the nucleus and moves into the cytoplasm, where it is translated (from RNA to protein).
What is the method by which eukaryotes synthesize proteins?Protein synthesis takes place in all cells, including eukaryotes and prokaryotes. Transcription (turning DNA into RNA) and translation are the two steps involved in the generation of proteins (RNA to protein). Between prokaryotes and eukaryotes, there are differences in the place and method of protein synthesis.
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Which type of stimulus will maximally activate the sensory receptors within the semicircular ducts?.
Answer:
Rotational Motion
Explanation:
7. What is the difference between the
bonds that hold each nucleotide together
and the bonds between the nitrogenous
bases?
Answer:
The bonds which hold the nucleotides together are covalent bonds and the bonds between nitrogenous bases are hydrogen bonds.
Explanation:
I'll just put some additional info here in case you need it:
There are two types of bonds in each nucleotide: glycosidic bond: bond between a nitrogenous base and deoxyribose pentose sugar; and phospho-diester bond: bond between two deoxyribose pentose sugar molecules. Both of these bonds are covalent, meaning that the participating atoms share electrons.
The bonds between nitrogenous bases are hydrogen bonds. Hydrogen bond is an attraction between two atoms that already participate in other chemical bonds. So it is not really "a real bond" but rather electrostatic force of attraction.
ESPS are caued by the movement of what ion?
a. Na out of the cell
b. Na into the cell
c. K into the cell
d. Na , K into the cell
When sodium channels open in response to a stimulus, an excitatory postsynaptic potential (EPSP) takes place. As a result of the electrochemical gradient, sodium floods the cell.
Which ions result in an EPSP?Excitatory postsynaptic potentials (EPSPs) are connected to transmitter-induced increases in the synaptic membrane's Na+ and K+ conductance, which cause the membrane to depolarize and allow for the net entry of positive charge carried by Na+.
How do EPSP and IPSP ions work?EPSP: The passage of glutamate or aspartate ions causes EPSP to be produced. IPSP: Glycine or GABA flow causes IPSP to occur.
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What is the object in the middle with a coil of wire wrapped around a metal shaft?
A magnet in which the magnetic field is produced by an electric current is known as an electromagnet. Usually wound into a coil, the wire used to create an electromagnet.
What sort of magnet is an electromagnet?Devices with electric motors like electric fans and doorbells are examples of electromagnetic . The clapper is drawn to the electromagnet of a doorbell, which strikes the bell and causes it to ring. An electric motor converts electrical energy into kinetic energy by means of an electromagnet.
what are electromagnets?One definition of an electromagnet is a magnet that runs on electricity. An electromagnet's strength, unlike that of a permanent magnet, may be altered by varying the amount of current passing through it.
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in a phylogeny, information about relatedness is portrayed by the pattern of branching, not by the order of taxa at the tips of the tree.
On a phylogeny, the number of nodes separating two taxa indicates how closely related they are.
What are taxa ?A given taxon typically includes several taxa of lower rank. Taxa are arranged in a hierarchy from kingdom to subspecies. Certain taxonomic categories, which are listed in descending order and include kingdom, phylum (in plants, division), class, order, family, genus, species, and subspecies or race, are universally accepted for the classification of protists, plants, and animals.
Kingdom, phylum, class, order, family, genus, and species are the orderly groups, going from largest to smallest. 2. Each level is referred to as a taxon (plural: taxa) or taxonomic category in taxonomic nomenclature.
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essay about the cure for cancer
An essay in regards to the cure for cancer is given below
What is the cure cancer treatment?One of the most dreaded and feared diseases is probably cancer. Nearly 9.5 million individuals worldwide lost their lives to cancer in 2018. According to the World Health Organization, it ranks as the second most common cause of death.
Note Radiation, chemotherapy, and surgery are the most often used treatments. Other choices include hormone therapy, laser therapy, targeted therapy, immunotherapy, and others.
Therefore, The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
Therefore, Currently, there is no treatment for cancer. However, if treatment is effective, cancer may enter remission, which indicates that all outward indications of illness have disappeared. The likelihood of remission and a person's prognosis can both be considerably improved by early cancer detection and treatment.
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In pea plants, round seeds (R) are dominant to wrinkled seeds (r). A genetic cross of two plants, one homozygous dominant, one homozygous recessive for the seed shape trait occurs.
what percentage of offspring would have round seeds?
100% of the off spring of dominant homozygous and recessive homozygous parent for the particular trait will be round shaped.
What are homozygous and heterozygous alleles?Differ in the number of genes. These control our physical characteristics and health. Each variation is called an allele. Her two alleles of each gene are inherited from both parents.
Homozygosity is a term in the field of genetics that describes two identical copies of alleles within a DNA gene sequence that encodes a particular trait. We inherit genetic material from our father and mother, so not all double strands of DNA are exactly the same. Homozygosity can occur throughout her DNA in an organism replicating through two parental cells. We all have two alleles/versions, of each gene. Being homozygous for a particular gene means that we inherit two identical versions. , is the opposite of the heterozygous genotype with different alleles.
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which of the following statements about salmonellosis is false? group of answer choices it is a bacterial infection. a healthy carrier state exists. it is a self-limiting infection. the mortality rate is high. it is often associated with poultry products.
salmonellosis is a disease caused by salmonellosis bacteria and the mortality rate is high. it is often associated with poultry products.
What are antibiotics?
Antibiotics are medicine drugs specifically designed to treat bacterial infections that may cause harm to human health.
Moreover, septic shock is a phenomenon that occurs when blood pressure decreases to excessive values in the course of an disease/infection.
Bacteria can be classified into Gram-negative and Gram-positive, and Gram-negative bacteria may be negatively associated with septic shock because this type of treatment (antibiotics) can eventually trigger an increase in the amount of secreted endotoxins.
These toxins produced by Gram-negative bacteria (endotoxins) may produce serious harm to the health of the individual and thus antibiotics treatment may be deleterious.
In conclusion, antibiotics can lead to septic shock if used to treat gram-negative bacterial infections.
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which of the follow is part of the synthesis view of fiscal policy with which both keynesian and classical economists agree?
Both keynesian and classical economists agree with : Automatic stabilizers help reduce the fluctuations in aggregate demand and output.
What is the fiscal policy ?The use of taxation and expenditure by the government to affect the economy is known as fiscal policy. Fiscal policy is often used by governments to encourage robust, long-term growth and to lower poverty.
The use of taxation and expenditure by the government to affect the economy is known as fiscal policy. Fiscal policy is often used by governments to encourage robust, long-term growth and to lower poverty.
Tax reductions and increased public spending are the two main manifestations of expansionary fiscal policy. Both of these measures aim to boost overall demand while reducing budget surpluses or adding to deficits.
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The picture shows a unicellular organism called a
paramecium.
Which structures in a paramecium work together to keep it alive?
A. Specialized cells
B. tissues.
C.organelles
D.organ systems
Answer:
Cilia
Explanation:
The paramecium has many different parts that help it survive, including cilia on the outside of its body. Cilia are tiny hair-like projections that can bend and straighten, propelling the paramecium through watery environments. Movement is important because the paramecium must find food to eat.
Answer:
Organelle
Explanation:
it was correct
Living organisms require energy for biological processes. Chemical energy in a plant cell is.
For biological functions, ATP is a crucial source of energy. ATP serves as an intermediary energy source, receiving energy from molecules like glucose. plays the role of a typical intermediate in metabolism
What are the three forms of metabolism?Ectomorph, mesomorph, the endomorph are the three basic metabolic types; these are words you generally won't hear in your typical, everyday talks. Long-term, nevertheless, your workout strategy will benefit from understanding the types of bodies you were born with.
Is a high metabolism beneficial?People with high metabolisms typically burn calories more quickly than those with low metabolisms, which is advantageous. But at the other hand, if your metabolism is quick, it could be hard to acquire weight or keep up a good diet.
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which stage of cellular respiration takes place in the cytosol? answer electron transport chain atp synthase glycolysis citric acid cycle
In contrast to the Krebs cycle and electron transport, which take place in the mitochondria and call for oxygen, glycolysis occurs in the cell’s cytosol and is oxygen-free.
Embden, Meyerhof, and Parnas provided the glycolysis diagram. Thus, it is often referred to as the EMP pathway. The cell's cytoplasm is where it takes place. The primary goal of glycolysis is to create the countless ATP molecules required for different types of cellular metabolism.
All cells' cytosols undergo glycolysis, which is the main pathway for the metabolism of glucose. Depending on whether oxygen is present, it can happen either aerobically or anaerobically. Due to the fact that aerobic glucose oxidation generates 32 mol of ATP for every mol of glucose, this has therapeutic significance.
While the Krebs cycle and electron transport take place in the mitochondria and require oxygen, glycolysis happens in the cell's cytoplasm without the need for it.
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Organisms need energy for chemical reactions to build larger molecules. They also need energy to move and to stay __________.
All living things require energy to survive. In order to build complex carbohydrates, proteins, and lipids from the byproducts of photosynthesis in plants and digestion in animals, energy is needed.
In addition to using the energy in food to fuel life processes, organisms construct larger organic molecules, such as proteins, DNA, and fats (lipids), using the atoms found in food molecules. Cells release energy to create new compounds by dissolving the bonds in food molecules.
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which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissues?
A byproduct of combustion called carbon monoxide functions as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and the brain.
Uncompleted fuel combustion produces carbon monoxide (CO), an odourless, colourless gas. People exposed to CO gas will become ill because the CO molecules in their bodies will replace the oxygen.
Our senses cannot perceive CO because it lacks odour, colour, or taste. As a result, dangerous gas concentrations can accumulate indoors without people noticing until they become ill. Additionally, when someone is sick, they may mistake their symptoms for those of the flu, leading them to miss the early indications of CO poisoning.
As a result, carbon monoxide, a byproduct of combustion, can be said to serve as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and brain.
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in tobacco plants, green color (c) is dominant to white (c). you cross 2 heterozygous green tobacco plants. what is the genotypic ratio of the offspring?
If in tobacco plants green color (C) is dominant to white (c) and we cross 2 heterozygous green tobacco plants Cc then the genotypic ratio of the offspring is 1/2 Cc, 1/4 CC and 1/4 cc.
What is a heterozygous individual?A heterozygous individual can be defined as an individual who carries two different gene variants or alleles for a given locus, which in this case is represented by a green color (C) allele that is dominant to the white (c) allele.
In this case, the Punnet square for this genetic cross is:
C c
C CC Cc
c Cc cc
Therefore, with this data, we can see that the genetic cross between heterozygous individuals is able to produce a progeny with a genotypic ratio of the offspring equal to 1/2 Cc, 1/4 CC and 1/4 cc.
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Fruit flies have 8 chromosomes in their body cells, while dandelion cells have 16 chromosomes. Which species do you predict makes the more genetically varied offspring? cite evidence from the model of meiosis to support your prediction.
Offspring of Fruit flies (Drosophila) and dandelion cells have same genetical variability because both of them are diploid cells.
During Meiosis , Each and every diploid species receives the same response.
There are just half as many chromosomes in somatic (body) cells.
Gametes cells have n cells, whereas somatic cells include 2n cells.
Fruit fly (Drosophila) gametes have four chromosomes, but dandelion cells gamete have eight chromosomes.
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What is Important about the soil pH?
Answer:
Soil pH affects the amount of nutrients and chemicals that are soluble in soil water, and therefore the amount of nutrients available to plants. Some nutrients are more available under acid conditions while others are more available under alkaline conditions.
In which organ does a fertilized egg change from an embryo to a fetus? A. Fallopian tubes B. Uterus C. Urethra D. Vagina
Answer:
B. uterus
Explanation:
Fertilization of an egg by sperm normally occurs in the fallopian tubes. The fertilized egg then moves to the uterus, where it implants into your uterine lining.
Answer:
B. uterusInside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.
Wegener's theory of continental drift states that Earth's landmasses once were joined into a supercontinent called Pangaea. The landmasses then slowly drifted to their current positions. How does the evidence below support Wegener's theory?
1. The fit of the coastlines of Africa and South America:
2. Fossils of animals that are found on opposite sides of large oceans:
3. Evidence of north-moving glaciers in tropical southern India:
Answer: 1
Explanation: