Biosafety Level-2 or BSL-2 is the lowest BSL that recommends the use of a biological safety cabinet to contain aerosols based on risk assessment.
What are biosafety levels?A biosafety level or pathogen/protection level, is a set of biocontainment precautions which is required to isolate the dangerous biological agents in a given enclosed laboratory facility for the experimentation.
The standard BSL-2 is the lowest BSL which recommends the use of a biological safety cabinet to contain the aerosols based on risk assessment. BSL-2 PPE consists of a dedicated lab coat, gloves, and eye protection. Other PPE may also be required. These PPE are not wore in people.
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in calliphoridae, there are bristles in an orderly line down the , a plate on the lateral portion of the mesothorax. this is a major characteristic of calliphoridae, and the absence of bristles on this plate means the fly is not calliphoridae.
The absence of bristles on this plate means the fly is Muscidae . Bristles on the meron of a calliphoridae differentiate it from a muscidae.
What is a calliphoridae?The thorax and abdomen of adults of the Calliphoridae are frequently blue, green, or black, and they are frequently lustrous and metallic in colour. Three-segmented, aristate antennas are used. The second antennal segment has a prominent groove, and the aristae are plumose along their entire length. Calliphoridae members have calypters that are fully formed, frontal sutures that are present, and branched 2 veins. Differentiating between members of this family is done using the traits and configurations of their hair-like bristles. The meron of every blowfly is covered in bristles. When recognising this family, look for two notopleural bristles and a hindmost posthumeral bristle that is situated lateral to the presutural bristle. The dorsal suture runs continuously down the middle of the thorax, and the posterior calli are clearly delineated. There is no or little development of the postscutellum.
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What will result from the binding of a transcription factor to an enhancer region?.
The binding of a transcription factor to an enhancer region causes increased transcription of a distant gene.
What is the transcription factor?Transcription factors are proteins that bind to DNA-regulatory sequences (enhancers and silencers) in the 5-upstream region of target genes to modulate gene transcription. This can lead to increased or decreased gene transcription, protein synthesis, and altered cellular function. Many transcription factors have now been identified, and it appears that a large portion of the human genome codes for these proteins.
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the close genetic relatedness of human pubic lice to gorilla body lice has been used to argue that humans share a last common ancestor with gorillas, not chimpanzees. that hominin body hair was lost by the time of australopithecines. that early hominins hunted gorillas. that homo ergaster and gorillas had sexual encounters. that there has been convergent evolution of human and gorilla lice.the close genetic relatedness of human pubic lice to gorilla body lice has been used to argue that humans share a last common ancestor with gorillas, not chimpanzees. that hominin body hair was lost by the time of australopithecines. that early hominins hunted gorillas. that homo ergaster and gorillas had sexual encounters. that there has been convergent evolution of human and gorilla lice.
The close genetic linkage of human pubic lice to gorilla body lice, in that hominid body hair, was lost in the Australopithecine era.
Three types of lice attack humans: head lice, body lice, and pubic lice are the basis of researchers in deepening their evolution.
Pubic lice are in a different genus from body lice and head lice. Pubic lice are the closest living relative to the gorilla louse. Although the common ancestor of humans and gorillas lived about 7 million years ago, pubic lice and gorilla lice have a much younger ancestor - around 3-4 million years ago. The most likely explanation is a shift in a host as gorilla lice adapted to life on human pubic hair. This will happen after we lose our body hair, so our head and pubic hair are in different places and before we start wearing clothes.
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What are the requirements when checking in PSE products?.
The correct statements are : A ,D ,E , F
A Date received must be documented on each page of the invoice
D Handwritten verification marks (circle, slash, checkmark, etc.) to confirm receipt of each product must be documented on the invoice
E Signature documented on each page of the invoice
F All CIII-V's and PSE products should be checked into the electronic delivery check-in screen via CFRX.
The kind of identification used, the government agency issuing it, the identification number, the name and address of each buyer, the product they purchased that includes ephedrine or pseudoephedrine, including how many grams it contains.
Each page of the invoice must include the date it was received. Documented initials on each page of the invoice If state laws permit, technicians can check in orders for CIII-V and PSE items. Handwritten verification marks (circle, slash, checkmark, etc.) must be recorded on the.
Check-in Requirements: For domestic flights, most airlines advise that you go to the airport at least two hours before departure, and three hours for international flights. Please have your government-issued ID and electronic ticket number available.
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Full Question :
What are the requirements when checking in ClII-Vand PSE products?
A Date received must be documented on each page of the invoice
B Initials documented on each page of the invoice
C Technicians can check in CIII-V and PSE products orders if state regulations allow
D Handwritten verification marks (circle, slash, checkmark, etc.) to confirm receipt of each product must be documented on the invoice
E Signature documented on each page of the invoice
F All CIII-V's and PSE products should be checked into the electronic delivery check-in screen via CFRX.
A trait that is found in and shared by two or more species, but is not derived from a common ancestor is known as.
The trait that is found in and shared by two or more species, but is not derived from a common ancestor is known as analogous trait.
Analogous traits are shared by two or more species because they have arisen independently in each species by the process of natural selection. It is also known as homoplasy. For example, the wings of birds and insects are anatomically different in structure but have been adapted to perform the same function that is flying. Analogous structures are the result of convergent evolution. In the case of phylogeny, evolutionary investigations focus on two types of evidence that is morphologic (form and function) and genetic.
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The following excerpt and image come from a scientific paper written by Ebrahimi & Chess. They discuss the role of G proteins in olfaction, or the sense of smell.
Each mammalian olfactory neuron appears to use the same machinery for transducing signals from its odorant receptor molecules. Upon odorant binding, the receptor is thought to activate Golf_\text{olf}start subscript, start text, o, l, f, end text, end subscript, a G protein. Golf m_\text{olstart subscript, start text, o, l, f, end text, mediated activation of adenylate cyclase III then raises intracellular cAMP levels, causing a cyclic-nucleotide-gated channel to open. The influx of cations through this channel ultimately leads to the formation of an action potential, which allows the primary neuron to signal to the brain.
A mutation in a component of this signal transduction pathway prevents the cyclic-nucleotide-gated channel from opening.
Which of the following scientific questions would best help researchers understand how the mutation prevents the cyclic-nucleotide-gated channel from opening?
- Does mutation cause the influx of cations into the cell?
- Does mutation stimulate the conversion of ATP to cAMP?
- Does the mutation block the activation of adenylate cyclase III?
- Does mutation cause intracellular cAMP level to rise?
Does the mutation block the activation of adenylate cyclase III?
Does the mutation block the activation of adenylate cyclase III? is the best question which would best help researchers understand how the mutation prevents the cyclic-nucleotide-gated channel from opening.
Using dominant interfering mutations of adenylyl cyclase from the yeast Saccharomyces cerevisiae, the researchers investigated the interaction between RAS proteins and adenylyl cyclase. In this organism, RAS proteins activate adenylyl cyclase. A plasmid expressing a catalytically inactive adenylyl cyclase was discovered to dominately interfere with this activation. The interfering region was found to be adenylyl cyclase's leucine-rich repeat region, which is homologous to domains found in several other proteins and is thought to participate in protein-protein interactions.
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one example of these compounds is produced by the oxidation of 2-butanol [byoo-tah-nol], and a common test for these substances looks for the creation of iodoform [ie-oe-doe-form]. when humans produce too much of these chemicals because of too much fatty acid breakdown, their blood turns
High blood or urine ketone levels mean that you are at risk of developing diabetic ketoacidosis. It makes the blood acidic. This can be life-threatening, so it's important to keep an eye on your ketone levels.
Describe how fatty acids are broken down in the body.The building blocks of fat in our bodies and the food we eat are fatty acids. During digestion, the body breaks down fats into fatty acids, which are then absorbed into the blood. Fatty acid molecules usually combine in groups of three to form molecules called triglycerides. Fat digestion is also called β-oxidation. Each round of β-oxidation produces one molecule of acetyl-CoA, one molecule of NADH, and one molecule of FADH₂.
Ketone bodies are made using acetyl-CoA derived from fatty acid β-oxidation in the liver under certain metabolic conditions. The two ketone bodies are acetoacetate and β-hydroxybutyrate. High ketone levels turns the blood too acidic. This is a serious condition called ketoacidosis. The most common form of ketoacidosis is a complication of diabetes called diabetic ketoacidosis (DKA). DKA is a medical emergency that often has rapid onset, coma, and can be life-threatening.
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What is the value of the expression m8−(34−n) in simplest form, when m = 6 and n = 18
Answer:
32
Explanation:
(6)8-(34-18)
48-16
32
Hope this helps!
jack has hemophilia, which is a sex-linked blood clotting disorder. he blames his father for passing on the gene for hemophilia. explain to jack why his reasoning is wrong. how can jack have hemophilia if his parents do not?
The abnormal gene responsible for hemophilia is located on the X chromosome. Males have one X and one Y chromosome. In a male, the presence of the abnormal gene results in the deficiency.
Hemophilia is a sex-linked recessive disease. The defective genes are present only on the X chromosome and not on the Y chromosome. Since the father always contributes a Y chromosome and never passes an X chromosome to his son, the hemophilia gene can never be passed from father to son. If a mother is heterozygous (carrier) for hemophilia and the father does not have hemophilia, each son has a 1 in 2 (50%) chance of getting the hemophilia allele from his mother and having hemophilia. Each daughter has a 1 in 2 (50%) chance of having her mother's hemophilia allele and being heterozygous.
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What do they look at during a health inspection?.
They look at during a health inspection potentially hazardous foods that require precise time and temperature maintenance.
The purpose of the health inspector is not to close down a restaurant but rather to uphold regional hazardous food laws and instruct personnel on safe food handling procedures. Here are a few things an inspector will look closely at when inspecting your restaurant.
Items that directly relate to foodborne disease are deemed critical. These are marked on inspection forms by many counties as "red" items. Critical things include the following, as examples:
Be sure to wash your hands properly.
Verify if the source of the food is reputable.
Make sure cooked items are quickly chilled within the acceptable time frame.
Verify that the sanitizer concentration in commercial dishwashers is appropriate.
Check to see if any products raw or cooked or ready to serve haven't been contaminated with each other.
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fat soluble vitamins have a greater risk for toxicity because they are not easily
Even when consumed in high doses, fat soluble vitamins are less likely to create problems since they are eliminated through urine rather than stored.
What are vitamins?
Vitamins has been defined as a collection of molecules required for healthy cell growth, development, and function. While some vitamins support healthy neurons and infection resistance, others may aid in correct blood clotting or food energy absorption.
Water-soluble vitamins are promptly eliminated in the urine and are not retained by the body. In contrast to water-soluble vitamins, which are easily eliminated by urine, fat-soluble vitamins are dissolved in fat. If ingested in excess, they can be harmful due to rancidity and cannot be easily expelled through urine.
Thus, Even when consumed in high doses, fat soluble vitamins are less likely to create problems since they are eliminated through urine rather than stored.
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if no photosynthesis is occurring, but the algae are still respiring, what color would you expect the indicator to change?
If no photosynthesis is occurring, but the algae are still respiring, the color would expect the indicator to change into yellow.
In the dark, only respiration takes place because there isn't enough light for photosynthesis; as a result, only oxygen enters and carbon dioxide leaves the leaf. The hydrogencarbonate indicator turns yellow when carbondioxide from the leaf is released into it, turning it from red.Because chlorophyll absorbs all other colours but the green wavelengths in sunlight, it gives plants and algae their characteristic green color. For more effective photosynthesis, the various types of chlorophyll absorb slightly different wavelengths.Nearly all algae engage in the process, and in fact, much of what is currently known about photosynthesis was first uncovered through research on the green alga Chlorella. Chlorophyll is used by green algae in the genus Hyalotheca, a family of filamentous desmids (class Charophyceae), to absorb solar energy for photosynthesis.
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achondroplasia is a form of dwarfism that is inherited in humans as an autosomal dominant. what is the mutation rate in locus
There is a 50% probability that children born to parents who have achondroplasia will also have it, and there is an 80% likelihood that achondroplasia will develop spontaneously.
There is mounting evidence that FGF3R mutations result in "gain of function." It is hypothesized that FGFR3 slows the development of bone by preventing chondrocytes, the cells that make cartilage, from proliferating. Infants have a 50% risk of acquiring achondroplasia if one parent has the condition. The infant has a 75% chance of being affected if both parents have the condition. The mutation rate is estimated to be 1.4 x 10-5 per gamete per generation, and it accounts for about 80% of cases.
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a field called studies the relative contribution of heredity and the environment to individual differences. please type the correct answer in the following input field, and then select the submit answer button or press the enter key when finished. your answer:
Behavior genetics, also known as psychogenetics, is the study of how much heredity and how much environment contribute to individual differences.
What area of research examines how the environment affects how genes are expressed?A new field of study called "epigenetics" demonstrates how environmental factors—experiences as a child—actually affect the expression of their genes.
The majority of the research done by genetic psychologists focuses on how particular genes affect personality and behavior in people. Given that monozygotic twins have identical genetic make-up, twin and adoption studies—both of which are frequently used in the field of genetic psychology—can aid in research on the role of heritability in traits.
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beginning more than 4 mya, at least two lineages of hominin emerged, one that led to the genus homo and one that group of answer choices included the now-extinct descendants of au. afarensis. gave rise to the genus ardipithecus. evolved from earlier australopithecine lineages. ended with au. africanus.
Homo habilis, which means "able man" or "handy man" in Latin, is an extinct species of humans and the oldest member of the Homo genus. Homo habilis lived between 2.4 and 1.5 million years ago in sub-Saharan Africa (mya).
This species is referred to as "handy man" because stone tools were discovered close to its fossil remains, leading scientists to believe that this species had learned how to shape stone into tools.
Most scientists agree that Australopithecus species, which lived between 2.3 and 1.4 million years ago, was the ancestor of H. habilis. If H. habilis developed in East Africa, its forebears may have been Australopithecus afarensis and Australopithecus garhi, but if H.
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Which refers to a macromolecule that forms as a result of the joining of multiple monomers?.
a) Polymers refers to a macromolecule that forms as a result of the joining of monomers.
In the field of science, polymers can be described as long chains that are formed from joining monomers. Almost all of the large macromolecules that function inside the body of an organism are made by the joining of certain kinds of monomer molecules.
Monomers are macromolecules that join to form long chains of macromolecules that are referred to as polymers.
Polymers can be described as long chains that are organic compounds.
Examples of polymers include nucleic acids which are formed from nucleotide monomers, lipids which are formed from fatty acid molecules, and proteins which are made from amino acid molecules. Important parts of a cell are made from polymers.
Although a part of your question is missing, you might be referring to this question:
Which refers to a macromolecule that forms as a result of the joining of multiple monomers?.
a) polymer
b) monomer
c) lipids
d) nucleic acid
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Answer: D
Explanation:
What is an example of vestigial?.
Examples of vestigial organs include the human appendix, a snake's pelvic bone, and an animal's wing. One prominent example of a vestigial organ in humans is the appendix.
This inoperable organ slowly deteriorates, shrinking, and eventually disappearing. The guiding principle should be the homology of traits between vestigial and its equivalents. Bodily tissues, organs, or cells known as vestigial organs no longer function the same way they did in the trait's ancestor. Since they supported evolution, they aided in the explanation of adaptation.
A gene mutation that changes the proteins may cause such a structure to form. These mutant proteins produce vestigial of structures. Other examples of vestige organs include the tonsils, appendix, coccyx, wisdom teeth, and external ear nictitating membrane.
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hybridoma cells are widely used in industry for antibody production. which of the following statements about hybridoma cells is true?
Hybridoma cell secrete antibody that recognize single epitope of an antigen.
A popular technique for creating monoclonal antibodies is hybridoma technology. After immunizing mice with a particular antigen, antibody-producing B lymphocytes are isolated from the animals and fused with immortal myeloma cell lines to create hybrid cells, also known as hybridoma cell lines.
The steps in hybridization technology. The technical processes that make up hybridoma technology include the preparation of the antigen, immunization of the animal, cell fusion, hybridoma screening and sub cloning, as well as the characterization and production of particular antibodies.
Hence, hybridoma cell line are designed to produce antibodies.
Hybridoma cells are widely used in industry for antibody production. Which of the following statements about hybridoma cells is true?
a) Hybridoma cells are derived by fusing a myeloma cell with a liver cell.
b) Hybridoma cell lines are used to produce primary antibodies.
c) Hybridoma cell lines secrete antibodies that recognize a single epitope on an antigen.
d) Hybridoma cells divide twenty-eight times in culture, after which they enter senescence and die
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what descent group type is composed of multiple lineages who are presumed to descend from some unspecified ancestor? group of answer choices
Descent Group type is composed of multiple lineages who are presumed to descend from some unspecified ancestor .
What do you mean by Lineages ?Derivation: the lineal descent from a common ancestor. The gun's direct pedigree may be traced back to Erik Larson in the 1960s: a group of people who share a common progenitor. Particularly: a group of people whose common ancestor is thought to have been its founder.
Any descendant from a certain ancestor is referred to as having a lineage. Despite having six children, none of Mozart's offspring had children of their own, putting an end to the composer's bloodline after one generation.Open and closed lineages are different types of lineages because it is crucial for biology to distinguish between them. Lineage pluralism is therefore accurate. One can offer other arguments in favor of lineage plurality in addition to this one.By genetically mapping these creatures and searching for shared ancestors who gave rise to the two species during evolution, scientists have discovered this evolutionary relationship.In addition to enabling an understanding of the relationship between living things and the mechanisms that formed this connection, this is crucial for understanding the development of life on Earth.To know more about Lineage please click here ; https://brainly.com/question/26125007
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What type of mutation is only in reproductive cells?.
Germline mutation is only mutation in reproductive cells. A germline mutation, or germinal mutation, is any detectable variation within germ cells.
Mutations in these cells are the only mutations that can be passed on to offspring, when either a mutated sperm or oocyte come together to form a zygote. After this fertilization event occurs, germ cells divide rapidly to produce all of the cells in the body, causing this mutation to be present in every somatic and germline cell in the offspring; this is also known as a constitutional mutation.
Germline mutations can be caused by a variety of endogenous (internal) and exogenous (external) factors, and can occur throughout zygote development. A mutation that arises only in germ cells can result in offspring with a genetic condition that is not present in either parent; this is because the mutation is not present in the rest of the parents’ body, only the germline.
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a completely (100%) lactose intolerant person who takes a lactose tolerance test would have a significant increase in the blood concentration of which monosaccharide(s)?
The lactose tolerance test cannot determine the level of monosaccharides in the blood.
The lactose tolerance test is conducted by giving the patient a drink of lactose solution. After this, the blood sample will be collected and tested for.
The blood taken will be test for how much sugar is present in the blood and its levels. If the patient is lactose intolerant then the blood sugar level or the glucose level will rise slowly or not at all. This is due to the fact that our body is not able to break down lactose into glucose, hence there is not increase in the monosaccharide concentration of the blood.
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a single-cell atlas of mouse brain macrophages reveals unique transcriptional identities shaped by ontogeny and tissue environment
There is mounting evidence that macrophages play a key role in regulating brain health and illness. Parenchymal microglia have a crucial role, but other brain-resident myeloid cells are still difficult to find.
Uncovered the astounding diversity of non-parenchymal brain macrophages by dividing border regions and integrating single-cell RNA sequencing with high-dimensional cytometry, bulk RNA sequencing, fate-mapping, and imaging.
In the dura mater, subdural meninges, and choroid plexus, there were different subsets of border-associated macrophages, or BAMs, that displayed tissue-specific transcriptional fingerprints and underwent significant compositional changes during postnatal development. It was discovered that BAMs' gene regulation networks were fundamentally different from microglia's.
Importantly, discovered a distinct population that was not homeostatic and resided on the apical surface of the choroid plexus epithelium. Niche accessibility controlled BAM ontogeny and decided whether or not bone marrow progenitors gradually replaced embryonic macrophages.
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What is an example of a private club?.
Yacht clubs, country clubs, and golf clubs all are examples of private clubs.
A private club is a place that is not open to the public. A private members club is an organization that provides social and other amenities to members who typically pay a membership fee for access and use.
Private clubs are places that are not open to the public. Before an individual can join, it must be approved by the rest of the membership. When someone joins, they usually have to pay an initiation fee and a monthly membership fee.
Clubs must be funded primarily by dues, dues, and dues, with a limited amount of income from non-member sources and capital gains.
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From where do all preganglionic nerve fibers of the sympathetic nervous system arise?.
Answer: Preganglionic nerve fibers arise from a number of autonomic control nuclei within the hypothalamus and brainstem
Explanation: I hope this helps!!!!!!
What three activities are beneficial for your muscular system?.
Walking, jogging, lifting weights, playing tennis, are all good ways to exercise your muscles.
What is muscular system and example?
The muscular system is an organ system that provides strength, maintains balance, maintains posture, allows movement, and produces heat. It encompasses all muscle tissues, including skeletal muscle tissues, smooth muscle tissues, and cardiac muscle tissues. Walking, jogging, lifting weights, playing tennis, climbing stairs, jumping, and dancing are all good ways to exercise your muscles.
Why muscular system is important?
The muscular system is a group of organs that includes skeletal, smooth, and cardiac muscle. It allows the body to move, maintains posture, and circulates blood throughout the body. The nervous system controls the muscular systems of vertebrates, though some muscles are completely autonomous.
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How does hCG affect the immune system?.
It ensures fetal tolerance induction.
I hope this helps!!!!
pathogenic strains of streptococcus pneumoniae, the leading cause of bacterial pneumonia, have capsules. therefore the capsules are acting as a:
The capsule in Streptococcus pneumoniae acts as a virulence factor for this material.
Pneumonia is an illness that results from an acute infection of the lower respiratory tract. Pneumonia can be caused by fungal, bacterial or viral infections. In adults, cases of pneumonia are generally more often caused by viruses. The virus that is the main cause of pneumonia is Streptococcus pneumoniae.
Streptococcus pneumoniae is a gram-positive, ovoid or ball-shaped which is the main cause of pneumonia, sinusitis, otitis, bronchitis, bacteremia, meningitis, and other infectious processes. They have a polysaccharide capsule which acts as a virulence factor for an organism. After entering the lower respiratory tract, an inflammatory reaction will occur in the bronchial wall causing cells filled with exudate and epithelial cells to become damaged.
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What statements describe the ecological and economic significance of the green algae? (Choose three)
- They are a such of food products such as carrageenan.
- They can cause harmful algal blooms.
- They are potential sources of renewable oil supplies.
- They are a source of food for many aquatic animals.
- They can cause harmful algal blooms.
- They are potential sources of renewable oil supplies.
- They are a source of food for many aquatic animals.
The statements that describe the ecological and economic significance of the green algae are:
- They can cause harmful algal blooms.
- They are potential sources of renewable oil supplies.
- They are a source of food for many aquatic animals.
Green algae are considered to be the largest group of algae that live mostly in water. They are known to have huge ecological as well as economic benefits.
Green algae are known to be one of the potential sources through which oil is renewed. This occurs when green algae under the process of photosynthesis in the aquatic habitat. The sugars produced as a result of photosynthesis can be used for the production of oil.
They can also cause the production of algal blooms.
As green algae can produce their own food, they are the producers of the aquatic habitat. Consumers such as aquatic animals that cannot produce their own food depend on green algae as a food source.
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you are installing a new wireless network in your office building and want to ensure it is secure. which of the following configurations would create the most secure wireless network?WPA2 and AESWPA and MAC filteringWEP and TKIPWPA2 and RC4
you are installing a new wireless network in your office building and want to ensure it is secure. WPA2 and AESWPA configurations would create the most secure wireless network.
On each door, new locks were put in place. We debated setting up a new phone system. The process of getting a computer software ready for use is known as installing. Installing is the process of configuring hardware or software in a certain way so that it may be used with a computer. In order to share resources (such printers and CDs), trade files, or enable electronic conversations, two or more computers are connected to form a network. A computer network can connect its computers through wires, phone lines, radio waves, satellites, or infrared light beams.
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TRUE/FALSE. a gene that blocks dna replication in response to dna damage is fused to a regulatory element that activates transcription always, even when dna is not damaged
Yes, this statement is true. A gene that blocks DNA replication in response to DNA damage is fused to a regulatory element that activates transcription always, even when DNA is not damaged.
What do you mean by transcription?Transcription is the process of copying a segment of DNA into RNA. The segments of DNA transcribed into RNA molecules that can encode proteins are said to produce messenger RNA. Other segments of DNA are copied into RNA molecules called non-coding RNAs. mRNA comprises only 1–3% of total RNA samples.
Moreover, transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule. Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
Hence, transcription, as related to genomics, is the process of making an RNA copy of a gene's DNA sequence. This copy, called messenger RNA (mRNA), carries the gene's protein information encoded in DNA.
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