Phenolics control microbes by :
1) Disrupting the cell membrane
2) Denaturing metabolic enzymes
3) Disrupting the cell wall
Phenolic compounds are a group of small molecules characterised by their structures having at least one phenol unit. Based on their chemical structures, phenolic compounds can be divided into exclusive subgroups, along with phenolic acids, flavonoids, tannins, coumarins, lignans, quinones, stilbens, and curcuminoids.
Phenolics play important roles in plant development, specifically in lignin and pigment biosynthesis. In addition they provide structural integrity and scaffolding assist to flora.
Phenolics have right chemical resistance and are immune to alcohols, esters, ketones, ethers, chlorinated hydrocarbons, benzene, mineral oils, fats, and oils.
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leslie has a severe sore throat and the lymph nodes in her neck are swollen. this would indicate that a) the focus of the infection is the lymph nodes. b) lymph is not flowing consistently through these lymph nodes. c) the lymph nodes contain an increased number of lymphocytes. d) the lymph nodes are actively producing phagocytes. e) the lymph nodes have increased their secretion of thymosin
leslie has a severe sore throat and the lymph nodes in her neck are swollen. this would indicate that c) the lymph nodes contain an increased number of lymphocytes.
What condition results in enlargement of the glands in the throat and neck?An upper respiratory infection is the most typical cause of enlarged lymph nodes, although there are other potential reasons as well. Consult your healthcare physician if they are enlarged without a clear explanation in order to rule out anything more dangerous.
Near an illness, lymph nodes or glands enlarge to aid in the body's defense against the infection. On occasion, a gland on one side of the body can enlarge. Other symptoms like a sore throat, a cough, or a high temperature might also be present.
The immune system of the body includes the lymph glands, often known as lymph nodes. In order to cleanse the body of infection, they gather and filter liquids.
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Which objective lens should you start with when attempting to locate something under the microscope?.
When attempting to locate something under the microscope, the objective lens that should be started with is 4X.
Objective lens are the one that are placed closest to the specimen when observing under the microscope. Their function is to gather light from the specimen and focus it towards a different type of lens called the ocular lens.
4X is the lowest magnification of the objective lenses. However, they have a larger field of view and therefore more of the specimen can be observed at once that allows the observer to locate the exact target. Due to poor magnification, the target may not be clearly visible, however it can be later watched in higher magnification.
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the quotient of a number and the sum of 2 and 4
Step-by-step explanation:
X is the number
X/2 is quotient of a number and 2
5 + X/2 = 15
Multiply all terms by 2 to eliminate fractions
10 + X = 30
X = 20
number is 20
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Which rna is a copy made from a dna strand that can be transported to a ribosome?.
Answer:
mRNA
Explanation:
also known as messager RNA
made from DNA template
takes it to rRNA
translated by the rRNA
also known as ribosomal RNA
they help translate the codons
make protein when stop codon is sent out
Mutations that inhibit the function of photosystem i but not photosystem ii would result in a plant cell that could still______.
Light with longer wavelengths > 680 nm tends to be absorbed by photosystem I, while light with shorter wavelengths 680 nm likely to be absorbed by photosystem II.
What roles do plants' photosystems I and II play in the environment?
The pigments needed to gather photons and use light energy to catalyze the basic photosynthetic endergonic reactions that result in high energy molecules are found in the two multi-protein complexes known as photosystem I and photosystem II.
What happens if photosystem 1 is shut down?
Membrane disruptors, sometimes known as contact herbicides, are substances that stop Photosystem I from working. The rapid breakdown of cell membranes causes cell contents to spill into the intercellular gaps.
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To investigate how the vegetation in a coastal ecosystem changes with distance from
the high tide mark, the BEST sampling technique would be
(A) a line transect placed across the ecosystem
(B) regular observation of the ecosystem
(C) a quadrat placed randomly within the ecosystem
(D) a piece of string placed across the ecosystem
which gives results obtained
A line transect placed across the ecosystem is the best sampling technique.
What kind of vegetation is there along the coast?
Maritime forests, scrub thickets, grassy upland grasslands, freshwater swamps, freshwater marshes, mangrove swamps, saltwater marshes, and grassy or forested dunes are a few examples of common coastal vegetation environments.
What is line transect method?
As a guide for a sampling technique used to determine the distribution of organisms, a tape or string is laid along the ground in a straight line between two poles. Sampling is strictly limited to organisms that are in direct contact with the line.Another form of systematic sampling, similar to the belt transect, is the line transect. The line transect involves drawing a line through a habitat. It might be as easy as laying a string or rope across a habitat. In this strategy, the organisms that really touch the line are taken into account. As a result, only organisms that come into contact with the line can be sampled.Despite being similar to the belt transect, this approach only yields a little amount of data. It merely displays the changes occurring along the line. Species' existence and absence are noted. It displays a specific linear or gradient pattern along the line. With the aid of scale-drawn icons for various species, the data is presented as a diagram. The relative densities of different species cannot be determined via a line transect. The belt transect method is slower than this one, though.Hence line transect method is best used to investigate the vegetation of coastal system.
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space between the lungs in the chest: a.trachea b.peritoneum c.pleura d.mediastinum e.bronchial tubes
The space between the lungs in the chest: (c) pleura.
Lungs are the respiratory organs that are involved in the exchange of gases from the body. They are connected to the respiratory tract that mediates the passage of air to and from the outer environment. On the lungs are very small air sacs that increase the surface area of lungs in order to maximize the exchange.
Pleura is actually a thin layer of tissue surrounding the lungs. Its function is to protect the lungs from sudden shock and injury. The cells of pleura also produce a fluid that functions to cushion the lungs.
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A sequence of biotic changes that regenerate or create an ecological community is known as?.
A sequence of biotic changes that regenerate or create an ecological community is known as ecological succession.
Ecological succession is the process of change in an ecological community's species composition over time. The time frame can span several decades or fewer (for instance, following a wildfire). The community grows through an increase in complexity from a small number of pioneering plants and animals to a stable or self-sustaining climax community.
Succession is a process that occurs after a disturbance or the early colonization of a new environment. It involves changes to an ecological community that are more or less predictable and orderly. Secondary succession refers to succession that occurs after a pre-existing community has been disrupted, whereas primary succession refers to succession that starts in new environments with no impact from pre-existing groups.
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Question Which type of sedimentary rock is formed from mineral grains precipitated by evaporation?
Responses:
A)chemical
B)intrusive
C)clastic
D)organic
Chemical sedimentary rock is formed from mineral grains precipitated by evaporation.
Option A is correct.
What kind of sedimentary rock is generated from mineral grains precipitated by evaporation?When the amount of water lost by evaporation surpasses the entire amount of water from rainfall and water influx from rivers and streams, layered crystalline sedimentary rocks known as evaporites are produced.
What kind of sedimentary rock precipitates right out of the water?Minerals that accumulate in saline water form chemical sedimentary rocks. The bodies of organisms are used to form organic sedimentary rocks. Particles the size of sand make up sandstone.
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Answer:
A)chemical.
Explanation:
it was correct on test
glucose-6-phosphate dehydrogenase deficiency (g6pd) is inherited as an x-linked recessive allele in humans. a woman whose father suffered from g6pd marries a normal man. what proportion of their sons is expected to be g6pd?
0.25 of their sons is expected to be g6pd.
Because the sons will inherit only one of their mother's two X chromosomes. The father is normal, so he will pass on a normal allele. The mother has an X-linked recessive allele, so she can only pass on that allele to her daughters, who will not have G6PD deficiency.
The sons will have a 50% chance of inheriting the X chromosome from their mother—that is, they'll get either the normal or G6PD-deficient allele from her. If they get the normal allele from her, then they'll be fine and won't be affected by G6PD deficiency. If they get the G6PD-deficient allele from her, then they'll have G6PD deficiency themselves and be affected by it.
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which lewis antigen(s) would be detected when phenotyping the red cells of an adult who has the le, se, and h genes?
Once the secretor (Se) genes is missing is the Lea antigen present upon that red blood cell membrane.
What are the 4 types of cells?Epithelial cells, which are closely bonded to one another, nerve impulses, which are specialized in communication, muscle cells, which are specialized in contraction, and connective tissue cells are the four primary cell types.
Where are cells found?Upon the earth, there really are living cells wherever unless it is sterile. If you run your hands along a smooth metal gate, you will likely find pollen, bacterial, fungal, and green algal cells (even wood is made up of dead plant cells).
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a sample of john's blood shows a high level of pyrogens. this would indicate that john a) is feeling achy. b) is producing t lymphocytes. c) has a sore throat. d) is running a fever. e) has swollen lymph nodes.
The answer is d) running a fever, as indicated by high level of pyrogens in blood.
Pyrogens are things that can cause fever. Endotoxins, which are lipopolysaccharides (LPS) made by Gram-negative bacteria like E. coli, are the most frequent pyrogens. These substances go through the blood to the brain, where they interfere with the hypothalamus' ability to control body temperature. The hypothalamus is tricked into believing that the body is cooler than it actually is because the pyrogens suppress heat-sensing neurons and excite cold-sensing ones. A fever results from the hypothalamus's response, which causes the body's temperature to rise above normal
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which of the following about the law of segregation is false? question 15 options: a) it is a method that can be used to determine the number of chromosomes in a plant. b) it states that each of two alleles for a given trait segregate into different gametes. c) it can be explained by the segregation of homologous chromosomes during meiosis. d) it can account for the 3:1 ratio seen in the f2 generation of mendel's crosses.
The statement that is false about the law of segregation is that it is a method that can be used to determine the number of chromosomes in a plant. That is option A.
What is law of segregation?The law of segregation is one of the Mendelian law which states that each individual that is a diploid has a pair of alleles (copy) for a particular trait.
The difference parts of law of segregation include the following:
The first part defines the alleleThe second part states that organisms inherit one allele from each parent.The third part states that gametes only carry one allele for each trait.The fourth part defines the difference between dominant and recessive genes.Therefore, the law of segregation has nothing to do with determination of the number of chromosomes in a plant.
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Glucose sugar, a large molecule, can ONLY pass through the cell membrane with the help of a __________ via the process of _______________________.
Glucose sugar, a large molecule, can ONLY pass through the cell membrane with the help of a carrier protein via the process of facilitated diffusion.
Which membrane must glucose pass through?A large class of membrane proteins known as glucose transporters aid in the enhanced diffusion of glucose across the plasma membrane.
Therefore, Large molecules make it challenging for glucose to diffuse across a membrane. As a result, it moves down the concentration gradient through enhanced diffusion across membranes. The glucose is bound by the carrier protein at the membrane, which changes its structure to make it easier to transfer.
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the constriction of blood vessels in the scalp, which limits the oxygen supply to the brain is a .
An intracranial stenosis is a narrowing of the blood arteries in the scalp that reduces the oxygen supply to the brain.
What causes the scalp's blood arteries to constrict, limiting the amount of oxygen that can reach the brain?A narrowing of the arteries within the brain is known as intracranial stenosis. It is brought on by a buildup of plaque in the blood vessel's inner wall, just like carotid stenosis in the neck. The part of the brain that the damaged veins serve has less blood flow as a result of the blood vessels' constriction.
Which happens at the initial phase of stress?Your body's defenses begin to build during the alarm stage, when your central nervous system is awakened. A fight-or-flight reaction is produced at this SOS stage. During the resistance stage, your body starts to heal and restore normal heart rate, blood pressure, etc.
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Resistant and nonresistant E. coli bacteria samples were spread on the agar plates below and incubated for 24 hours. Select the true statements from the list below.
The resistant E. coli strain grows on streptomycin negative plates.The resistant E. coli strain grows on streptomycin negative plates.
The nonresistant E. coli strain grows on streptomycin negative plates.The nonresistant E. coli strain grows on streptomycin negative plates.
The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.
The resistant E. coli strain grows on streptomycin positive plates.The resistant E. coli strain grows on streptomycin positive plates.
Both resistant and nonresistant E. coli strain show no growth on streptomycin positive plates.Both resistant and nonresistant E. coli strain show no growth on streptomycin positive plates.
The nonresistant E. coli strain shows more growth on the streptomycin positive than the resistant E. coli strain.
The true sentences are:
(A). The resistant E. coli strain grows on streptomycin-negative plates. The nonresistant E. coli strain grows on streptomycin-negative plates.
E. coli is a type of bacterium that is frequently found in the intestines of people and other animals. Some strains of this bacterium have the potential to cause extremely serious food poisoning.
The population of E. coli that is highly streptomycin resistant belongs to the streptomycin-positive strain, whereas the negative strain has the reverse effect.
That's why it's imperative to only choose a streptomycin-positive strain of the E. coli bacterium if you wish to grow up a significant number of streptomycin-resistant bacteria.
Therefore, you would need to select a colony of the bacteria from the streptomycin-positive plate and allow it to develop on a streptomycin-positive plate if you wanted to build up a big quantity of streptomycin-resistant E. coli.
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What occurs inside of a cell while it is performing the process of respiration? (1 Point)
The negative charge inside of the cell is used to increase the concentration chemicals inside of the cell
Sugar is broken down to generate adenosine triphosphate (ATP) molecules that are used for energy
Light reactive chemicals combine carbon dioxide (Co2) and water to form glucose molecules that are stored as
food[object Object]. Incorrect answer
The cell membrane forms around air bubbles to create a vacuole that is used to separate the oxygen from the
rest of the air
Adenosine triphosphate (ATP) molecules are produced from the breakdown of sugar and are used as an energy source.
What is respiration explain?The physical processes (such as breath and diffusion) via which a living creature acquires the oxygen it wants to make energy and get rid of waste gases include the act or activity of breathing (as carbon dioxide)
What is importance of respiration?The primary goal of breathing is to deliver oxygen to the cells at the a rate sufficient to meet their metabolic requirements. Through the skin's circulation, oxygen is transported from the lungs to the tissues through this process.
How many types of respiration are there?There are two varieties of breathing: The process of aerobic respiration occurs when there is oxygen present. Absence of oxygen results in anaerobic respiration.
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select all that are categories of neurotransmitters based on chemical composition. multiple select question. acetylcholine sterols neuropeptides glycoproteins monoamines amino acids
Based on their chemical make-up, neuropeptides and monoamines are two categories of neurotransmitters.
What are the four classifications of neurotransmitters according to chemical make-up?According to their chemical and molecular characteristics, the four main types of neurotransmitters include peptides like somatostatin and opioids, amino acids like glutamate and glycine, monoamines like dopamine and norepinephrine, and purines like adenosine triphosphate (ATP).
Test your knowledge of neurotransmitters.Neurotransmitter definition. An impulse is transmitted from one nerve cell to another nerve, muscle, organ, or other tissue through the release of a substance from a nerve cell. Neurologic information is transported from one cell to another via neurotransmitters.
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An example of an age-structure influence on human population size is that _____.
An example of an age-structure influence on human population size is that populations dominated by juveniles should experience rapid growth.
A populace's boom fee is strongly stimulated through the proportions of people of precise ages. With understanding of this age shape, populace boom may be extra appropriately predicted. Age structure data permit the fee of boom (or decline) to be related to a populace's degree of monetary development.
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Blood is called tissue give reason
Blood is both a tissue and a fluid. It is a tissue because it is a collection of similarly specialized cells that serve particular functions. These cells are suspended in a liquid matrix (plasma), which makes the blood a fluid.
Explanation:Blood is considered a type of connective tissue because it connects the body systems, transports oxygen and nutrients to all the parts of the body, and removes waste products. Blood has an extra-cellular matrix called plasma, with red blood cells, white blood cells, and platelets floating in it. Blood is a specialized form of fluid connective tissue. Blood is regarded as a connective tissue because as the blood is circulated throughout the body due to the pumping action of the heart, it carries different materials and gases from one part of the body to another. Hence, it connects different tissues and organs of the body and thus, is called connective tissue. It is considered a connective tissue because it consists of blood cells surrounded by a nonliving fluid matrix called blood plasma. It is the most atypical connective tissue: the fibres of blood are soluble protein molecules that become visible during blood clotting.
Write a short essay
explaining at least 2
problems and 2 benefits
that may result from genetic
engineering. Include
examples of each. Must be
at least 2 paragraphs (8-10
sentences)
Genetic engineering is the process in which uses laboratory based technologies to alter the DNA makeup of an organism
Genetic engineering are the artificial manipulation and modification and recombination of DNA or other nucleic acid molecule in order to modify an organism or population of organism and for examples genetic engineering may involve adding a gene from one species to an organism from different species to produce a desired trait and it is used in research and industry
Genetic engineering has been applied to the production of cancer therapies and brewing yeast and genetically modified plants and livestock's
For example
Corn has been modified by food engineer to be resistant to specific bugs
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Would there be more ocean floor between the continents or less? Why?
Answer:
Yes there is
Explanation:
There is more ocean flooring than there is land, reason being is there is a lot more water than land. Take a look at pangea there is more water than there is land and its being stopped from reaching the core by the ocean floor and there is a lot of floor on the bottom of the ocean so yes there is more ocean floor between the continents. There is more because pangea broke off into pieces making more room for land
A therapist helps a client by focusing on her misguided thinking patterns. The therapist believes that by modifying how someone is processing information about the world, that this will help the person's overall mental health. For this therapist, there is an emphasis on thinking and processing.
With which of psychology's major perspectives does this therapist most closely align?
A. cognitive
B. psychoanalytic theory
C. behaviorist
D. humanistic
Why do heart cells have different characteristics than skin cells?
Responses
Heart cells have different DNA than skin cells.
Heart cells reproduce by cell differentiation.
Heart cells express different genes than skin cells.
Heart cells reproduce by mitosis
Answer:
c) Heart cells express different genes than skin cells.
Explanation:
Heart cells have different characteristics than skin cells because, the heart cells express different genes than skin cells. Hence, the option (c) is correct answer.
when a body is dehydrated, water in the urinary bladder can be returned to the circulation directly. can be returned to the circulation after moving back into the kidneys. will still be expelled from the body in the urine
It will still be expelled from the body in the urine.
Your kidneys filter around 150 quarts of blood per day. The tubules return the majority of the water and other chemicals that pass through your glomeruli to your blood.
What about kidneys?They are primarily responsible for removing toxins from the blood and turning waste into urine. Around 160 grams of weight and one to one and a half liters of urine are excreted daily by each kidney. Every 24 hours, the two kidneys work together to filter 200 liters of fluid. You get pain in the region around your kidneys: On either side of your spine, close to the centre of your back, right below your ribs. The urinary tract, which includes your kidneys, produces and excretes urine from your body. In addition, you can experience the following symptoms as kidney disease worsens. Muscle cramps, a lack of appetite, swelling in the feet and ankles, dry, itchy skin, shortness of breath, trouble sleeping, and over- or under-urinating are all signs of motion sickness and nausea.Urine generated from waste products in your blood is one way that water aids kidney function. Additionally, drinking water keeps your blood vessels wide open, allowing blood to freely reach your kidneys and carry vital nutrients to them. But this delivery system has a harder time functioning if you become dehydrated.Learn more about kidneys here:
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give a description of the endosymbiont theory of plastid origin. how many times might chloroplasts have arisen?
Chloroplasts have arisen three times according to the endosymbiont theory.
According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms. The host cell and the endosymbiont each have a set of cell membranes that enclose the chloroplasts that resulted from primary endosymbiosis. When a eukaryotic cell absorbs a cell that has already experienced primary endosymbiosis, secondary endosymbiosis takes place. They surround the chloroplasts with more than two sets of membranes, as in chloroplasts of brown algae. When a eukaryotic cell assimilated another eukaryotic that was the product of an earlier secondary endosymbiosis, this process is known as tertiary endosymbiosis.
Therefore, chloroplast, as well as mitochondria, have occured thrice and are very different from the current prokaryotes like cyanobacteria.
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not all individuals are identical in what? A. ecosystem, B. community, C. Organism, D. Populations
According to the research, the correct answer is option B. In a community not all individuals are identical.
What is a community?It is a group of populations of different individuals, who live in the same place or biotope in which they find the environmental circumstances to guarantee their survival.
In this sense, these organisms of different species coexist and interrelate in a geographical region, forming a trophic chain and competing for the prolongation of their species.
Therefore, we can conclude that according to the research, a community is established by the set of different individuals that live in the same habitat, thus the correct answer is option B.
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the reticular layer of the dermis is composed of dense irregular collagenous connective tissue and it houses such structures as the sebaceous glands and sweat glands. true or false?
True: the reticular layer of the dermis is composed of dense irregular collagenous connective tissue and it houses such structures as the sebaceous glands and sweat glands.
The dermis is made up primarily of the reticular layer, which is the deep layer and forms a thick layer of dense connective tissue. Blood veins, nerve endings, hair follicles, and glands are all located in the dermis. Therefore, the given statement is true. The sweat produced by the sweat glands helps to maintain thermoregulation.
The fibroblast-produced protein called collagen serves as the glue that keeps the dermis together. Skin cells called fibroblasts are responsible for the durability and tenacity of the skin. A strong, insoluble protein called collagen is present in the connective tissues that hold muscles and organs in place throughout the body.
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What organ system in the human body contains the pituitary gland, hypothalamus gland, and thyroid gland?.
Answer:
endocrine system
Explanation:
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lymph nodes may be found individually, or clustered in specific regions of the body. which cluster of lymph nodes receives lymph from the head and neck?
Cervical lymph nodes are lymph nodes that receive lymph from the head and neck.
The sides and back of the neck include the cervical lymph nodes. Typically, these glands are incredibly tiny. The superficial and deep nodes, which are further divided into anterior and lateral cervical lymph nodes, are how the lymph nodes of the neck are normally arranged. These lymph nodes collect lymphatic drainage from the head lymph nodes and discharge it into the left or right lymphatic duct of the thoracic cavity.
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