Because they think that they are too humble to kill hosts. They think, "We will let Steve Harvey live."
Which of the following statements about deuterostomes is false?All deuterostomes have a similar pattern of early embryonic development.All deuterostomes are triploblastic and have three tissue layers.All deuterostomes have a coelom.All deuterostomes exhibit radial symmetry in their bodies.
The false statement is: All deuterostomes exhibit radial symmetry in their bodies.
For example, phylum Chordata contains animals that don’t have radial symmetry.
Deuterostomes share characteristics such as coelom that forms from folds of archenteron, radial, indeterminate cleavage, anus formed from blastopore.
The major distinctions between these two groups of animals (Bilateria) deuterostomes and protostomes are in their embryonic development. Another difference is that most Protostomes have schizocoelous development (cells fill in the interior of the gastrula and that is the way the mesoderm is formed) On the other side, in Deuterostomes, the mesoderm forms through invagination of the endoderm (enterocoelic pouching).
Briefly explain the advantage of a wittig synthesis over the more common dehydrohalogenation
Final answer:
The Wittig synthesis is preferred over dehydrohalogenation as it allows for the preparation of alkenes with high stereoselectivity, crucial for the biological activity of pharmaceuticals like taxol.
Explanation:
The advantage of a Wittig synthesis over dehydrohalogenation is highlighted by its use in the efficient synthesis of complex molecules like taxol, where the goal is to improve synthesis by reducing waste and enhancing the accessibility of life-saving drugs. The Wittig reaction allows the preparation of alkenes with high stereoselectivity, which is not possible with dehydrohalogenation and typically suffers from a lack of selective control in the formation of E/Z isomers. The Wittig reaction involves the creation of a ylide, which then reacts with an aldehyde or ketone to form an alkene directly, facilitating the formation of distinct geometric isomers. This stereoselectivity is crucial in pharmaceutical synthesis, where the biological activity of a molecule can be dependent on its stereochemistry.
The Wittig reaction provides the advantage of fixing the location of the double bond in alkene synthesis, unlike dehydrohalogenation which often produces mixtures. This method is also versatile, tolerating various functional groups.
The Wittig reaction offers significant advantages compared to the more common dehydrohalogenation method for synthesizing alkenes. A principal advantage is that the location of the double bond in the alkene is absolutely fixed. This is in contrast to the mixtures that are often produced by alcohol dehydration or other elimination reactions, where control over the position of the double bond is less precise.
The Wittig reaction involves the reaction of ylides with aldehydes or ketones to give substituted alkenes, allowing for precise construction of larger molecules. Additionally, this method is robust and can tolerate the presence of various functional groups, making it a versatile tool in organic synthesis.
The double bond location is fixed.Mixing of products is minimized.Applicable to a wide range of starting materials.Linoleic acid is a polyunsaturated fatty acid found
Here is the complete statement: Linoleic acid is a polyunsaturated fatty acid found in PLANT OILS.
Linoleic acid is a polyunsaturated essential fatty acid that is used in the biosynthesis of prostaglandins and cell membranes. It can be found in plants glycosides (it is especially plentiful in canola oil) in natures and it is an essential fatty acid that humans need in their diets. In humans, linoleic acids are found majorly in the brain and in the retina. The acid is very important for brain growth and development especially in children.
A nurse is caring for an adolescent client with autism spectrum disorder. define autism spectrum disorder. what are common manifestations of autism spectrum disorder?
Autism spectrum disorder can be defined as a complex developmental disorder that influences communication and behavior of affected persons. This disorder cause problems in social interaction and it also cause restricted and repetitive patterns of actions or behavior.
Common manifestations of autism spectrum disorder include; repetitive actions or thoughts, delayed speech and language skills, avoidance of eye contacts, high sensitivity to light, sound and touch, short attention span and hyper behavior.
Autism spectrum disorder is a neurodevelopmental disorder characterized by impaired social interaction and communication abilities. Common manifestations include deficits in social interaction communication difficulties repetitive patterns of behavior or interests and difficulties in using and understanding nonverbal cues.
Explanation:Autism spectrum disorder is a neurodevelopmental disorder characterized by impaired social interaction and communication abilities. It is a spectrum disorder meaning its severity can differ from person to person. Common manifestations of autism spectrum disorder include deficits in social interaction communication difficulties repetitive patterns of behavior or interests, and difficulties in using and understanding nonverbal cues.
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Transcription in bacteria differs from transcription in a eukaryotic cell because __________________________. (a) RNA polymerase (along with its sigma subunit) can initiate transcription on its own. (b) RNA polymerase (along with its sigma subunit) requires the general transcription factors to assemble at the promoter before polymerase can begin transcription. (c) the sigma subunit must associate with the appropriate type of RNA polymerase to produce mRNAs. (d) RNA polymerase must be phosphorylated at its C-terminal tail for transcription to proceed.
The correct answer is: (a) RNA polymerase (along with its sigma subunit) can initiate transcription on its own.
More differences between prokaryotic and eukaryotic transcription:
• In prokaryotes transcription occurs in the cytoplasm (unlike in eukaryotes in nucleus) and it is simultaneous with translation,
• In prokaryotes there is only one type of RNA polymerase (in eukaryotes there are three types of them).
• There is no sigma subunit in eukaryotes, the initiation of transcription begins thanks to initiation factors.
• Promoter region in prokaryotes contains pribnow box, while in eukaryotes it contains TATA and CAT box.
Transcription in bacteria is different from that in eukaryotes primarily because bacterial RNA polymerase can initiate transcription independently while eukaryotic RNA polymerase requires additional proteins known as transcription factors to start the process.
Explanation:Transcription in bacteria differs from transcription in a eukaryotic cell primarily due to the role and requirements of the RNA polymerase and associated elements in the transcription process. In a nutshell bacterial RNA polymerase (with its sigma subunit) can initiate transcription on its own, but the RNA polymerase in eukaryotes requires the assistance of other proteins known as transcription factors to bind to the promoter region and commence transcription.
In prokaryotic cells such as bacteria, transcription is fairly straightforward - the RNA polymerase with its sigma subunit binds to a particular sequence of the DNA (known as the promoter) and starts the transcription process. The sigma subunit aids in recognizing and binding to the promoter region for transcription initiation.
On the other hand, in eukaryotes, transcription is more complex. The eukaryotic RNA polymerase cannot initiate transcription independently. Rather, specific proteins known as transcription factors must first bind to the promoter region of the DNA. These factors then aid in recruiting the RNA polymerase to the promoter to start transcription. Eukaryotic cells also follow a more regulated transcription process as the cell must produce only the specific pre-mRNAs needed for protein synthesis.
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How are the words balance and homeostasis connected?
Balance is to maintain different elements in equal or in the correct proportions. Homeostasis is the process by which the body maintains constant levels of physiological elements such as blood sugars. This is done by balancing positive and negative feedback mechanisms.
Homeostasis is a process by which an organism manages the stability. Homeostasis means the balance or equilibrium of cell and body. The meaning of both words are same.
What is homeostasis?Any strategy by which living organisms actively maintain the relatively steady environment essential for survival is referred to as homeostasis.
Examples are thermoregulation, osmoregulation, calcium homeostasis.
It is an organism's ability to retain a consistent internal environment.
Keeping a stable internal environment involves regular modifications as conditions change within and outside the cell.
Thus, homeostasis and balance are related by their same meaning.
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A laboratory animal may eat any one of three foods each day.laboratory records show that if the animal chooses one food on onetrial, it will choose the same food on the next trial withaprobability of 50 percent, and it will choose the other foods onthe next trial with equal probabilities of 25 percent.
yes i agree because it might stay the same or go up who knows
Of all the organisms that are living today what percentage will eventually become fossils
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↪ I think its from 6%-10% of living organisms today that will become fossils
↪ Animals have a less likely chance since they have parts that are difficult to become fossils (like teeth, bones)
↪ Plants may decompose and go underwater to be used as Crude Oil
↪ Most of the population are humans, which will be extremely hard to fossilise
HOPE THIS HELPS
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In incomplete dominance, both alleles are expressed in offspring. Please select the best answer from the choices provided T F
False. Incomplete dominance is when both genotypes are recessive, so instead of both showing up, the phenotype is a combination of both alleles. For instance, if a red flower and white flower crossed and both were homogeneous recessive for their colors, their offspring would be pink.
Answer:
Explanation
Hopes this helps. The answer is false.
Which is not a characteristic of living things? Organisms can adapt to changes. Organisms respond to changes. Organisms only need water. Organisms are made of cells.
Not a characteristic of living things is organisms only need water.
The development of the male reproductive system occurs in coordination with other human systems. Which of the following is an example of this coordination?
A. The endocrine system releases the hormone testosterone.
B. The muscular system strengthens the uterine wall.
C. The circulatory system restricts blood flow to the testes.
D. The excretory system removes urea from the blood.
I think the answer is A.
Hope this helps.
Male reproductive system works in response to particular hormones. It involves endocrine system that releases hormone testosterone.
What is testosterone?Testosterone is a male hormone that is responsible for masculine characters.
It is very much important for male physical development. In male it regulates libido, development of genital organs, bone mass, distribution of fat, production of red blood cells and sperm, etc.
Thus, option A is correct.
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If ATP were replaced by a nonhydrolyzable ATP analog in different cell types, which of the following processes would NOT be negatively affected? - transport of vesicles from Golgi to the ER - G-actin polymerization into F-actin - transport of vesicles from ER to the Golgi - cytoplasmic streaming
ATP has long been known to play a central role in the energetics of cells both in transduction mechanisms and in metabolic pathways, and is involved in regulation of enzyme, channel and receptor activities. Numerous ATP analogues have been synthesised to probe the role of ATP in biosystems (Yount, 1975; Jameson and Eccleston, 1997; Bagshaw, 1998). In general, two contrasting strategies are employed. Modifications may be introduced deliberately to change the properties of ATP (e.g. making it non-hydrolysable) so as to perturb the chemical steps involved in its action. Typically these involve modification of the phosphate chain. Alternatively, derivatives (e.g. fluorescent probes) are designed to report on the action of ATP but have a minimal effect on its properties. ATP-utilising systems vary enormously in their specificity; so what acts as a good analogue in one case may be very poor in another. The accompanying poster shows a representative selection of derivatives that have been synthesised and summarises their key properties.
In energy-transducing reactions, ATP is normally hydrolysed between the ß and γ phosphate groups, and modification of this region produces slowly hydrolysable or non-hydrolysable analogues (e.g. AP.PNP). These derivatives can be used to assess the role of binding energy in the transduction process. Non-hydrolysable analogues are also useful in crystallographic studies, as are the stable complexes formed between protein-bound ADP and phosphate analogues, such as vanadate. Another route to making a stable ATP state is the use of Co(III) or Cr(III) metal substitutes that display very slow ligand-exchange rates. ATPγS is hydrolysed in many systems but usually shows a much reduced rate compared with ATP. This has been exploited in kinase/phosphatase studies, because once an amino acid side chain has been thiophosphorylated it may be resistant to rapid dephosphorylation. Sulphur analogues in the ɑ and ß positions give rise to stereoisomers that can be used to probe the specificity of binding sites. Introduction of bulky organic probes on the phosphate chain generally gives poorly binding analogues, but this factor is exploited in caged-ATP derivatives that contain a photolabile derivative (McCray and Trentham, 1989). Flashes of 350-nm light release ATP within milliseconds and can be used to initiate reactions in vitro or within cells. Different caging groups have different absorption characteristics and photolysis rates.
Introduction of spectroscopic probes (absorption, fluorescent, EPR and NMR probes) is best done through the adenosine or ribose groups, depending on the specificity of the particular binding site. Although ATP absorbs strongly in the UV light (259 nm) range, this signal is usually masked by protein absorbance and cannot be exploited in spectroscopic studies. The adenine ring can be modified to shift the absorption to >300 nm (e.g. 2-SH-ATP), but, in general, fluorescent derivatives provide more-sensitive probes. Among the apparently subtlest of changes is the substitution of an adenosine with a fluorescent formycin ring. However, the slightly longer C-C bond that connects to the ribose results in this analogue preferentially existing in the syn conformation, in which the base is positioned over the ribose, rather than the extended anti conformation, which is required by most protein-binding sites. In any event, this naturally occurring nucleoside base has not been available from commercial sources for several years. Substitution of groups in the 8 position of adenine also tends to favour the syn conformation.
Examine the phylogenetic tree and use it to answer this question. which two organisms are most closely related? question 5 options: euryarchaeotes and diplomonads euglena and brown algae brown algae and dinoflagellates brown algae and red algae
Brown algae and dinoflagellates
Reason: Because they are the closest being in the same branch, makes them the most related.
Hope this helps! :))
Select two jobs that require specialized training in agriculture.
produce broker
advertising agent
truck driver
human resources professional
agriculture scientist
Human resources professional and agricultural scientist are required to specialize in training in agriculture.
Human resources professional and agricultural scientist
The cranium provides protection for what important organ in the body?
From what I know the cranium protects the organ called the brain. It is made up of 8 different bones that supports your head & protects your brain from injury. Some of the other bones protect the sides of the brain & supports the sides of your face. The cranium is basically a cozy little home for your brain.
Every cell in the body needs oxygen and nutrients in order to perform cellular functions. Which three organ systems interact to obtain, process, and transport oxygen and nutrients to all of the body's cells?
The respiratory system takes oxygen from the air and sends it from the alveoli to the circulatory system. The circulatory system carries the oxygen and glucose to your cells for energy. And lastly, the digestive system to carry the nutrients and remove the waste.
The organ system which intake oxygen into the body is respiratory system and circulatory system distribute the oxygen all over the body. The nutrients are processed and transported by the digestive system.
What is organ system?An organ system is a group of organs combined to perform one or more specific functions. There are various organs systems in our body namely respiratory system, circulatory system, digestive system, nervous system etc.
Respiratory system involves nasal part and lungs. Oxygen is up taken by this system and stores in the sir sack of lungs. Later blood is oxygenated by circulatory system and distributed throughout the body through veins.
Similarly the nutrients and water from the diet is absorbed by the digestive system including the organs from mouth to stomach. The absorbed nutrients are distributed through blood.
Finally the remaining wastes products are passed to excretory system.
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A pH of _____ is considered neutral. 7 14 2 0
A pH of 7 is considered neutral
What is the The area that includes everything between the cell membrane and the nucleus of a cell
I believe the answer is Cytoplasm.
logan has suffered a deterioration of some of his intellectual and physical abilities that has occurred over the course of a long period of time. logan is experiencing the death of brain cells. which condition is occurring?
Answer:
Neurodegeneration
Explanation:
The term neurodegeneration refers to a group of disorders which are characterized by a progressive waste of function or structure of neurons, that in worst cases can include death of neaurons.
Many neurodegenerative disorders such as Parkinson's disease,– including amyotrophic lateral sclerosis, Huntington's disease and Alzheimer's disease can occur due to neurodegeneration.
Neurodegeneration can manifest itself in various forms such as lack of physical and intellectual abilities like inability to use muscles or memory loss. These disorders cannot be completely cured and ultimately lead to the death of neurons.
As mentioned in the question, the person suffers from progressive loss of intellectual and physical abilities that has occurred over the course of a long period of time. Therefore, it is most probable that he is having some neurodegenerative disorder.
Hope it helps!
raido waves are a part of the electromagnetic spectrum with high wave lengths and low frequencies
true
false
The however is True.
The correct answer would be True
@thats the truth :)))
What do manufacturers use water for?
A. to transport people
B. to irrigate farms
C.to create tools
D.to produce wood and paper products
Answer: It is D. To produce wood and paper products.
Explanation: I took the test and got it right.
Answer: D.to produce wood and paper products
Explanation:
The wood and paper products requires water. Wood chips, logs are used for manufacturing of paper, cardboard and packaging material. In the manufacturing process the fine slurry of wood material is prepared by adding water with fine grained wood fibers this is called as wood mulch. This mulch is dried in sunlight and afterwords used for manufacturing of products.
Which is an endocrine function?
A. The pancreas releases insulin into the bloodstream.
B. Salivary glands release saliva into the mouth.
C. Pyloric glands release mucus to the stomach.
D. Sweat glands release sweat to the skin.
A. The pancreas releases insulin into the bloodstream.
Answer:
a
Explanation:
8. Agent that kills microorganisms, rather than inhibits it:
Agent that kills microorganisms, rather than inhibits it: bactericid e
Microbial growth can be controlled and that control usually involves the use of physical or chemical agents. Chemical agents which either kill the microorganisms are called cidal agents while those that prevent their growth are referred to as static agents. of microorganisms. Thus, the term bactericidal refers to killing bacteria, and bacteriostatic refers to inhibiting the growth of bacterial cells.
Neurons generally receive information via their
a. cell bodies.b. nerves.c. dendrites.d. glial cells. e. axons.
C. Neurons generally receive their information via dendrites
Michelle and her students have carried out an experiment similar to the Urey-Miller experiment. What do you think they are likely to find at the end of their experiment?
A. Ocean water
B. Organic molecules
C. An energy source
D. Small organisms
Answer:
(B). Organic molecules
Explanation:
In 1953, Miller and Urey performed an experiment, in which they made conditions similar to conditions present during early earth. In their experiment, Urey and Miller studied chemical origin of life and found that organic molecules were spontaneously formed under early earth conditions.
Hence, Michelle and her students would find organic molecules at the end of their experiment as their experiment was similar to experiment of Urey and Miller.
Thus, the correct answer is option (B).
Final answer:
Michelle and her students are likely to find organic molecules as a result of their experiment, which simulates conditions of early Earth, supporting the idea of abiogenesis.
Explanation:
Based on the Miller-Urey experiment, if Michelle and her students carried out a similar experiment, they are likely to find organic molecules at the end of their experiment. The Miller and Urey experiment was designed to simulate the conditions of early Earth and demonstrated that organic molecules, such as amino acids, could form from inorganic precursors and an energy source like electric sparks that mimicked lightning. This finding provided support for the idea of abiotic synthesis of organic compounds, which are essential for the development of life.
Several hypotheses exist about how life originated on Earth, and the Miller-Urey experiment supports one of them: the abiogenesis or chemical evolution theory. Despite these findings, there is still debate and different hypotheses regarding life's origins since the experiment replicated conditions thought to exist billions of years ago, and the exact process that led from non-living chemicals to living organisms remains unclear.
According to Erikson's theory of psychosocial development, a child learns to be independent in the __________ stage.
According to Erikson's theory of psychosocial development, a child learns to be independent in the 'autonomy vs. shame and doubt' stage.
Autonomy vs. shame and doubt' is Erikson's second stage of psychosocial development, which typically occurs between the ages of 1 and 3 years old. During this stage, toddlers are eager to assert their independence and gain a sense of self-rule over their actions and bodies.
This is often referred to as the 'me do it' stage, where children want to perform tasks by themselves, such as choosing their clothes or feeding themselves. Erikson emphasized that it is crucial for caregivers to provide a supportive environment where toddlers can safely explore and make decisions autonomously.
If caregivers are overly strict or critical, the child may start to feel ashamed of their behavior and doubt their abilities, leading to low self-esteem and a lack of confidence. The key is to strike a balance where the child feels safe but also has the freedom to learn and grow from their own experiences.
Organic sediment on lake bottoms and the ocean floor is broken down by microbes into inorganic forms of phosphorus in a process known as ________?
the process is best known as eutrophication
Answer:
Eutrophication
Explanation:
Organic sediments at the bottom of the lakes and at the bottom of the ocean are broken down by microbes into inorganic phosphorus forms in a process known as eutrophication.
Eutrophication (or eutrophication) is a process usually of anthropic origin (caused by man), or rarely of a natural nature, having as its basic principle the gradual concentration of accumulated organic matter in aquatic environments. Among the impact factors, contributing to the increasing pollution rate in this ecosystem, are: domestic waste (sewage), agricultural fertilizers and industrial effluents, directly discharged or percolated towards watercourses (rivers and lakes, for example).
During this process, the excessive amount of minerals (phosphate and nitrate) induces the multiplication of microorganisms (algae) that inhabit the surface of the water, forming a dense layer, preventing the penetration of light.
Cranberries and grapes may have therapeutic value. A cranberry company obtained the patent for a process to extract the oil from cranberry seeds. According to the patent, this oil can be used to treat breast cancer or to reduce its incidence. The oil can be used in drinks and foods. A grape juice company claims to have evidence that certain grapes have health benefits ranging from improving cardiovascular health to improving cognitive brain function in the elderly. These claims will be tested by the Food and Drug Administration (FDA) before the companies are allowed to market their products for “treating” ailments or “improving” health. Until then, the companies can describe that their products “help to maintain” or “support” health. Until studies support their claims, the companies cannot ascribe direct health benefits to their products. Why would the FDA perform tests when a cranberry company and a grape company have already conducted research on the same products?
The FDA has a purpose to only allow safe medications on the market, as well as to have full information about them before allowing the companies to claim that they are good for some things. The reason for this is to not allow the companies to manipulate with the people and sell them products with claims on them that are not realistic. Also, the people should be protected, and they should only get safe medications that have been tested and proved to be as claimed by the companies in order to help them.
If the FDA is not conducting their own private research before the companies are allowed to claim something about their product, than their will be a lot of manipulation on the pharmaceutical market.
Answer:
A. The FDA is the only organization that can test if health actually improves.
Explanation:
Which of the following is a factor that determines the rate of impulse propagation, or conduction velocity, along an axon?a) length of the axonb) the number of axon collaterals extending from a truncated axonc) degree of myelination of the axond) whether the axon is located in the central nervous system or in the peripheral nervous system
Answer:
c) degree of myelination of the axon
Explanation:
The myelin sheath covers many axons in central nervous system (CNS) ( by oligodendrocytes) and in the peripheral nervous system (PNS) (by Schwann cells). Their function is to insulate axons and to increase the speed at which information travels from one nerve cell to another.
Nerve conduction velocity is specific to each individual and depend on the level to which that axon is myelinated, but also on an axon's diameter.
True or false the blues was a style of music born of suffering
I think true if its not sorry
The answer is TRUE
hope you get the answer right