The first step in the creation of a Program Evaluation Review Technique (PERT)/Critical Path Method (CPM) chart is to identify all the project tasks. Correcta answer: letter A.
This includes determining the required sequence of tasks and the duration of each task. Once this is done, the graphical planning aids can then be used to determine the logical order of the project tasks.
Additionally, it is important to consider any factors that could affect the timeline of the project, such as resources, budget, deadlines, and other constraints. Once all of this is taken into consideration, the chart can be created to graphically represent the project timeline and determine the critical path. Additionally, the chart can be used to adjust the timeline and resources to ensure that all of the tasks are completed on time and within budget.
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If cellular respiration is 12,850 gC/m2/year for a tropical rainforest ecosystem, what is its gross primary productivity?
Primary productivity refers to the output of primary producers. Gross primary productivity (GPP) and net primary productivity are the two categories of primary productivity (NPP).
What is gross primary productivity?The rate at which solar energy is absorbed per unit area in a unit of time during photosynthesis is known as gross primary productivity (GPP).
Net primary productivity = Gross primary productivity - Respiration
Gross primary productivity = Respiration + Net primary productivity
Therefore, whereas gross primary production (GPP) is the overall rate at which material is generated.
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Which component of a galaxy is often found between the stars and looks like a cloud or smoke? (2 points)
a
Dust
b
Gas
c
Object
d
Star
Answer:
because gas is always around the Galaxy
select the definition of gene silencing. a repressor protein binds to the promoter, preventing transcription. a mutation in rna polymerase prevents it from binding the promoter, preventing transcription. a mutation in the promoter prevents rna polymerase from binding, preventing transcription. a deletion of part of the beginning of a gene sequence prevents transcription of the gene. the structure or location of a gene prohibits access by transcriptional enzymes.
The definition of gene silencing is when a repressor protein binds to the promoter, preventing transcription. Correct answer: letter A.
Gene silencing is a process in which the expression of a gene is reduced or completely suppressed. This is usually accomplished through the binding of a repressor protein to the promoter region of the gene, which prevents the gene from being transcribed and translated into a functional protein.
This can be done through a variety of mechanisms, such as DNA methylation, histone modifications, and alterations in the structure or location of a gene. Gene silencing can also be achieved through the use of small interfering RNAs (siRNA) or antisense RNAs, which bind to mRNA and prevent the translation of the gene. Gene silencing can be used to regulate gene expression in a variety of contexts, from development to disease.
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Which statement best describes an example of how a catastrophic event leads to decreased biodiversity ?
Human-induced urbanization generally reduces forest biodiversity due to the loss of habitat and resources in the process of urbanization.
What is urbanization?Urbanization refers to the process by which cities emerge from urban areas.
Cities are created by removing vegetation and constructing infrastructure such as buildings, roads and bridges.
Removal of vegetation leads not only to the loss of habitat for organisms, but also to the biodiversity that makes up the vegetation itself.
Therefore, urbanization automatically leads to biodiversity loss in the Amazon rainforest. The vegetation is uprooted. Trees can be pulled from the ground and transported to another location. Organisms living in or near these uprooted trees must be displaced. This can result in the loss of species of organisms that can also affect plant-animal interactions.
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the fragmentation period of therapeutic recreation involved which of the following trends or events?
The growth of the American Therapeutic Recreation Association and the disagreement over the therapeutic recreation movement's philosophical viewpoint are the events involved in the fragmentation period of therapeutic recreation.
The events involved in the fragmentation period of therapeutic recreation include the growth of the American Therapeutic Recreation Association and the disagreement over the therapeutic recreation movement's philosophical viewpoint. In order to enhance and maximize one's health, physical function, social and emotional well-being, and overall quality of life, therapeutic recreation practitioners use evidence-based leisure and recreation interventions.
Through recreational therapy, people with particular medical issues can enhance their knowledge, skills, physical health, and emotional well-being. To set health goals and create a strategy to fulfil your requirements, recreational therapists collaborate with your medical team and you.
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Which of the following characteristics is not helpful in differentiating between psoriasis and atopic dermatitis?
A. Distribution
B. Family history
C. Lesion morphology
D. Chronicity
The correct answer is B. Family history. Psoriasis and atopic dermatitis can have similar distributions, lesion morphology and chronicity, so family history is not a helpful characteristic for differentiating between the two.
Atopic dermatitis (AD) and psoriasis are two common inflammatory skin diseases that can be difficult to differentiate due to their similar presentations. Although AD and psoriasis may present with similar distributions, lesion morphology, and chronicity, family history can be a helpful factor in distinguishing between the two. AD is known to have a strong genetic component, and is often associated with a family history of atopic conditions such as asthma, eczema, and hay fever.
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2. Carbon cycles through the biosphere, the hydrosphere, the atmosphere, and the lithosphere. Why are atmospheric carbon dioxide levels rising, but total carbon levels remaining the same? There are more organisms performing photosynthesis than before. There are more organisms performing cellular respiration than before. Carbon is exiting carbon sinks in the lithosphere faster than it is being deposited Some carbon is being transformed into other elements. 1 point
Photosynthesis, fire, the burning of fossil fuels, weathering, and volcanism are just a few of the processes that move carbon through the atmosphere, biosphere, geosphere, and hydrosphere.
What are the hydrosphere's two primary constituents?The most prevalent elements in the hydrosphere of Earth are oxygen and hydrogen. The most prevalent element on Earth's hydrosphere is the same as the most prevalent element in the lithosphere and biosphere.
What is the primary source of water in the hydrosphere?Water covers about two thirds of Earth's surface. Only 2.5% of this is fresh water, and only a very small portion of this may be used as a water supply. Of this, about 97.5% by volume is stored in the oceans as salt water. Our primary water sources are rainwater, groundwater, and surface water.
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This dimension is related to criteria such as carbon dioxide emissions, use of nonrenewable resources, or other factors that relate to sustainability.
Supportability is an inexorably significant element of the worldwide turn of events, as it connects with ecological, financial, and social perspectives.
A critical element of maintainability is lessening ozone-depleting substance emanations and the utilization of sustainable assets.
To lessen carbon dioxide outflows, state-run administrations, associations, and people ought to endeavor to decrease their energy utilization, utilize more productive energy sources, and advance the utilization of sustainable assets.
Moreover, partners ought to guarantee that assets are utilized in a manner that limits harm to the climate and empowers monetary development.
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Which of following is a pharmacokinetic/pharmacodynamic characteristic of monoclonal antibodies (mAbs)?
A.The large size of mAbs typically hinders their distribution into tissue resulting in a small volume of distribution
B. mAbs are typically associated with clinically significant CYP-mediated drug-drug interactions
C. Most mAbs are renally excreted as intact molecules
D.Most mAbs are well absorbed when given via oral administration
The one that is pharmacokinetic or pharmacodynamic characteristic of monoclonal antibodies is option A which says that the large size of mAbs typically hinders their distribution into tissue resulting in a small volume of distribution.
Monoclonal antibody is an antibody that is produced from a cell lineage made by cloning a unique white blood cell. In short, all subsequent antibody that is produced this way can be traced back to one unique parent cell.
Monoclonal antibodies are dispensed by discharge or catabolism. Their size is huge, which means they can't be separated by the kidneys. However, their large size also means that they are difficult to distribute into tissue, which results in a smaller distribution volume.
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Based on the above considerations, which would be the best choice for a genetic transformation: a bacterium, earthworm, fish, or mouse? Describe your reasoning.
A bacterium would be the best choice for a genetic transformation because of its easy compatibility to reproduce frequently.
Bacteria are tiny, single-celled, easily reproducible creatures. The strain HB101;K-12 of the bacterium Escherichia coli (E. coli) best satisfies the criteria for genetic transformation. It only has one cell, reproduces every 20 minutes, does not infect humans, and cannot survive outside of a lab. It would therefore make for the ideal host organism.
The act of integrating exogenous DNA into an organism's germline so that it is passed down to next generations is known as genetic transformation. These initiatives aim to produce a stable alteration in the target organism's phenotype that can be utilized to provide basic insights into the physiological, genetic, or other implications of the integrated DNA.
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Minerva is using rates of deposition to estimate the age of sediment deposit in the Mesa Verde National Park, Colorado. If the sediment deposit measures 300 centimeters (approximately 10 feet), how old can she determine the rock is?
the average rate of deposition is 1.4 cm/a over the first 1km. Hence, the age of the rock is approx 214 years.
What is a sedimentary rock?The formation of sedimentary rocks involves the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. The mechanisms that lead to the accumulation of these particles are collectively referred to as sedimentation.
When the land around you erodes or breaks down, sedimentary rocks are created.
Sediment refers to the tiny fragments of soil that deteriorate. Sand, mud, stones, minerals, fossils, and plants are all examples of sediment.
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A semipermeable membrane is placed between the following solutions.Which solution will decrease in volume?Solution A: 1.4% (m/v) starchSolution B: 7.62% (m/v) starch Solution A
A semipermeable membrane is placed between the following solutions. Solution A: 1.4% (m/v) starch solution will decrease in volume.In this case option, A is correct.
Semipermeable membranes are a type of polymeric membrane that can be biological or synthetic and allow some molecules or ions to pass through them via osmosis.
The pressure, concentration, and temperature of the molecules or solutes on either side, as well as the permeability of the membrane to each solute, all affect the rate of passage. Permeability may be influenced by solute size, solubility, properties, or chemistry depending on the membrane and the solute. The permeability and rate of the membrane will depend on how it is built to be selective in its permeability. Many thick natural and synthetic materials are semipermeable as well. The thin film that covers the inside of the egg is one illustration of this.
Selective permeability allows molecules to pass through biological membranes
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Awareness is the first step to getting support from concerned citizens and government agencies that can enforce measures to protect endangered ecosystems. For this assessment, you will be an environmental activist for a national park of your choice. You will describe the park, the biome it exists in, and why it is important to protect it.
You can do this in different ways. You can make a creative presentation, record a song, write a poem, or design a virtual poster, flyer, or brochure to present the information and spread awareness by including the information in the checklist.
View this generic Student Example for inspiration.
Now, select one of the following parks:
Grand Canyon
Sequoia National Park
Badlands National Park
Use the National Park Service website to find information about your chosen park.
Presentation Checklist
The following items must be included in your presentation to inform your audience:
Give the biome category of your park (equatorial biome, temperate biome, or cold biome).
Identify the specific biome type of your park (temperate grassland, tropical rainforest, etc.)
Describe the biome's average seasonal temperatures and precipitation.
Highlight any physical features of your park, such as mountains or bodies of water.
Showcase three plants or animals that live in your park. What helps them survive within the biome of the park?
Discuss any environmental concern impacting the park and why the park should be protected.
Include a call to action for your audience. What do you want them to do to help protect the biome where your park is located?
Get really creative, if you want, and have fun with this!
Explanation:
I have chosen Badlands National Park for my presentation.
The park is located in South Dakota and is part of the Great Plains biome, which is a temperate grassland biome. The average seasonal temperatures in the park vary from hot and dry summers to cold and snowy winters. Precipitation is low and mostly occurs during the summer months.
The park is known for its unique and striking rock formations, which are a result of millions of years of erosion and deposition. The park also contains a variety of plants and animals that have adapted to the harsh conditions of the grassland biome. Some of the notable plants in the park include the Badlands Sage, the Little Missouri Sunflower, and the Prairie Cactus. Animals that can be found in the park include Bison, Pronghorn, and the Black-footed Ferret.
One of the main concerns impacting the park is the loss of biodiversity due to human activities such as grazing and oil drilling. The park is also threatened by climate change, which is causing changes in temperature and precipitation patterns, and putting pressure on the park's ecosystems.
To protect the park, it is important to reduce human impacts on the park by limiting grazing and oil drilling and promoting sustainable tourism. Additionally, it is important to take action to address climate change by reducing greenhouse gas emissions and supporting conservation efforts.
I call on my audience to take action by supporting conservation organizations, reducing their own carbon footprint, and visiting the park in a sustainable way. Let's work together to protect and preserve Badlands National Park for future generations to enjoy.
Julianne, who suffers from familial hypercholesterolemia, presents with xanthomas. Xanthomas are excess cholesterol deposits, which appear as yellow skin lesions.
A. Pathologic calcification
B. Necrosis
C. Intracellular accumulation
D. Physiological hypertrophy
Answer:
Julianne is most likely presenting with xanthomas, which are a result of intracellular accumulation.
Which statement is true?
A) Thomas Malthus suggested that all species were not created at the same time.
B) Charles Lyell argued that geological forces had gradually shaped the Earth and continued to do so.
C) Georges-Louis Leclerc documented fossil discoveries in the 1790s and showed that extinction had occurred.
D) Georges Cuvier suggested that the Earth was much older than previously believed
E) Charles Darwin calculated that the Earth was more than 75,000 years old.
Statement A: Thomas Malthus suggested that all species were not created at the same time, is true.
Philosophers of the 18th and early 19th centuries had the general belief that humanity would keep progressing and lean toward utopianism. This idea was refuted by Malthus, who said that some groups of the general population have always been poor and miserable, which has actually slowed population growth. This indicates that choice A is correct.
Famous 18th-century British economist Thomas Robert Malthus is most known for the population increase theories he detailed in his 1798 book An Essay on the Principle of Population. Malthus predicted that populations will keep growing unless they were curbed or reversed by tragedy, starvation, illness, or conflict. He is also credited with creating the Malthusian growth model, an exponential formula for predicting population rise.
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Which one of the following characteristics of living organisms is not associated with the individual but is only seen in populations?A. Response to stimuliB. ReproduceC. Maintain homeostasisD. Evolve, individuals cannot evolve, only the population shows this characteristicE. Contain genetic material
The correct answer is D. Evolve, individuals cannot evolve, only the population shows this characteristic.
Evolution is a process that occurs over generations, and is only visible in the changes of a population or species over time. Individuals may experience mutations and changes, but these changes are not passed down to future generations and do not result in evolutionary changes.
The process of evolution is not limited to individuals, but rather occurs in populations over generations. Mutations and other changes to an individual organism's DNA may give it an advantage or disadvantage, but these changes will not be passed on to future generations unless they are also present in other individuals in the population, and this is only likely to happen if the advantage or disadvantage is beneficial or detrimental enough to affect the organism's ability to survive and reproduce.
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MicroRNA (miRNA) production occurs in several steps. Arrange the following statements describing the production and function of miRNAs in the order in which they occur A. The RNA binds to proteins to form the RNA-induced silencing complex B. The miRNA gene is transcribed to produce a primary transcript. C. The RNA strand that is complementary to the iRNA is degraded. D. A short RNA molecule with a hairpin loop structure is produced
E. Dicer protein produces a double-stranded RNA molecule
Answer:
B. The miRNA gene is transcribed to produce a primary transcript.
E. Dicer protein produces a double-stranded RNA molecule
A. The RNA binds to proteins to form the RNA-induced silencing complex
D. A short RNA molecule with a hairpin loop structure is produced
C. The RNA strand that is complementary to the iRNA is degraded.
The production and function of miRNAs occur in several steps:
The miRNA gene is transcribed to produce a primary transcript.
Dicer protein produces a double-stranded RNA molecule.
One strand of the double-stranded RNA molecule, the miRNA, is selected for further processing.
The miRNA forms a hairpin loop structure.
The miRNA binds to proteins to form the RNA-induced silencing complex (RISC).
The RNA strand that is complementary to the miRNA is degraded.
The miRNA regulates gene expression by binding to the mRNA and inhibiting its translation or promoting its degradation.
Which of the following describes the correct statement regarding the bonding arrangement in the Watson-Crick model of DNA? Explanation: Deoxyribose sugars connect to phosphates to make up the "backbones" of the DNA using phosphodiester bonds.
Watson-Cramp Construction of DNA is a twice left, a spiral particle forming of two sugar-phosphate spines outwardly, kept intact by hydrogen links between sets of nitrogenous bases within. A correct answer is option(A).
A DNA particle contains four nitrogenous bases i.e., adenine, guanine, cytosine, and thymine. The phosphodiester bond is the linkage between the 3' carbon particle of one sugar particle and the 5' carbon molecule of another. In the paper "A Construction for Deoxyribose Nucleic Corrosive." composed by j.D.Watson and F.H.C. Cramp proposed the twofold helix construction of DNA.
In Watson and Cramp's model, the two strands of the DNA twofold helix are kept intact by hydrogen connections between nitrogenous bases on inverse strands. Each set of bases lies level, framing a "rung" on the stepping stool of the DNA particle. Base matches aren't comprised of only any blend of bases.
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Q-Which of the following describes the correct statement regarding the bonding arrangement in the Watson-Crick model of DNA? Explanation: Deoxyribose sugars connect to phosphates to make up the "backbones" of the DNA using phosphodiester bonds.
A. Deoxyribose can bind to the nitrogenous bases A, T, C, or U.
B. A phosphate group binds to each rung of the ladder containing a purine and a pyrimidine.
C. Hydrogen bonds connect the nucleotide from one strand to the nucleotide of the other strand.
D. Phosphodiester bonds link to deoxyribose forming the backbone of DNA.
this list correctly represents the most likely sequence of the evolution of plants, from earliest to most recent: a.bryophytes b.seedless vascular plants, c.angiosperms d.gymnosperms.
Non-Vascular >> Vascular seedless >> Gymnosperms >> Angiosperms is the right order of evolution for the major plant groups.
What is plant evolution?The first terrestrial plants were non-vascular plants (liverworts, hornworts, and mosses), which arose around 470 million years ago.
Around 440 million years ago, the first plants with vascular tissues (such as phloem and xylem) developed.
Conifers and other gymnosperms were the first seed plants to arise some 350 million years ago (Upper Devonian).
Finally, some 125 million years ago, angiosperms (flowering plants) developed (Lower Cretaceous).
To summarize, the true evolutionary sequence of the major plant kinds is Non-Vascular >> Vascular seedless >> Gymnosperms >> Angiosperms.
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Following binomial nomenclature, which of the following makes up the scientific name of an organism?
the species name and then the family name
the genus name and then the species name
the family name and then the genus name
the genus name and then the order name
the species name and then the genus name
Answer:
ans is 2nd option
Explanation:
the genus name and then the specie name
and always remember that genus name begins with the capital letters and the specie with the small
Which of the examples below is an example of convection?
Responses
A heating a fish tank.heating a fish tank.
B rubbing your hands together.rubbing your hands together.
C striking a match.striking a match.
D basking in the sun.
Answer:
A. heating a fish tank
Explanation:
It's the only example where heat is truly moving around
(Please Help!) The image above makes a statement about the relationship between geology and biology. Explain what this relationship is
Answer: Geology is the study of the earth. Biology is the study of life. The two are inextricably interlinked. Recent work has shown that life formed extremely quickly on this planet and that since it formed it has shaped the environment in very profound ways. For example early life generated our oxygen rich atmosphere.
There are specific subdiciplines of geology that are heavily oriented towards biology. These include paleontology, paleobotany and paleoecology.
There are a number of rocks that are created predominantly by biological processes. Limestone is the principle example. Life also created our planet's coal and petroleum resources. These resources exist because life was so abundant that the environment's ability to 'eat' the surplus was outstripped.
||DONT USE IN EXACT WORDS...I ADVISE YOU NOT TO..PLAGARISM MAY BE DETECTED...YOU MAY LOOSE POINTS FOR THIS REASON.||
How do humans contribute to the level of carbon dioxide in the atmosphere
Answer:
Explanation:
Humans contribute to the level of carbon dioxide in the atmosphere primarily through the burning of fossil fuels such as coal, oil, and natural gas for energy. This releases carbon dioxide, which is a greenhouse gas, into the atmosphere. Deforestation and agriculture also contribute to the release of carbon dioxide, as trees and plants absorb and store carbon. Additionally, industrial processes and transportation also contribute to the release of carbon dioxide.
Molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called _____. isomers
When molecules have the same chemical formula (same numbers of each atom) but different three-dimensional shapes, it is called isomers.
Isomers are molecules that have the same chemical formula (the same number of atoms of each element), but have different arrangements of those atoms in space.
This results in different three-dimensional shapes, and often different physical and chemical properties as well.
There are several different types of isomers, including structural isomers (differing in the arrangement of atoms within a molecule), stereoisomers (differing in the arrangement of atoms in space), and optical isomers (mirror images that are non-superimposable). The existence of isomers helps to explain the diversity of chemical compounds and their properties.
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If they are bleeding really bad, and conscious, what can you have them do while you put on protective gear?
If someone is conscious and bleeding heavily, you can follow these steps while putting on protective gear: Assess the injury, Apply direct pressure, Elevate the injury, Call for medical help, Reassure the person and Put on protective equipment.
How do I control bleeding?One can control bleeding by putting pressure on the particular area with a tissue, clean cloth or gauze pad. The bleeding will stop after a few minutes. If the blood soaks via the gauze, add more gauze or another cloth and apply more pressure.
Can Salt control the bleeding?Rubbing your wound with some salt might sound like a terror with a lot of pain. But it can be quite the opposite. Salt helps absorb blood, which also helps dry, close and heal an open wound faster.
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(chapter 1.4) living organisms share most of the characteristics below. which one characteristic is not shared by all living organisms?
The characteristic that is not shared by all living organisms is the ability to create art, such as sculptures, paintings, or music.
While some organisms may display behavior that could be interpreted as artistic, this is not a universal characteristic of all living organisms.
Humans, however, have the ability to create art that goes beyond instinctive behavior and requires the cognitive abilities of decision making and creative expression. Artistic creations can take many forms, from painting and sculpting to music and literature, and can serve many purposes, from expressing emotion to conveying an idea or raising awareness about a social issue.
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Formulate a weekly schedule that shows evidence of three different activities beneficial for your muscular system. Activity every day, aerobic exercises for 30 minute three times a week, time to rest and relax, reducing stress, warming up muscles before activity, and eating a healthy diet.
Weekly schedule beneficial for your muscular system: Activity every day, 30 minutes of aerobic exercise three times a week, time to rest and unwind, stress reduction, muscle warming before activity, and healthy eating.
Muscle-expanding activities include jogging, lifting weights, tennis, climbing stairs, jumping, and dancing. Muscle growth is aided by any exercise that forces the body to work against gravity. Without exercise, muscles will weaken over time. Perform weight-bearing activities like dancing, running, jogging, and jumping rope. Adults should exercise for at least 30 minutes each day. Being physically active can help you manage your weight, improve your brain health, lower your risk of disease, strengthen your bones and muscles, and make it easier to do things you normally do.
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there are two incomplete-dominant alleles for petal color in a population of flowers. 36% of the organisms have white petals, and 48% of the flowers have pink petals. what percentage of alleles in this population code for red petals (R)?
If 36% of the organisms have white petals and 48% have pink petals, then the remaining percentage of organisms that have red petals is 16%.
What is an allele percentage?The relative frequency of an allele (gene variant) at a specific locus in a population, expressed as a fraction or percentage, is known as allele frequency or gene frequency.
Therefore, the percentage of alleles in this population that code for red petals can be calculated as follows:
100 - 36 - 48 = 16%
So, 16% of the alleles in this population code for red petals (R).
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Which of the following is a feature of the lymphatic system?
All of the following are features of the lymphatic system:
The lymphatic vessels, which are similar to blood vessels but carry a clear fluid called lymph.
Lymph nodes, which are small, bean-shaped structures located along the vessels that filter out bacteria, viruses, and other foreign substances from the lymph.
The thymus, spleen, and tonsils, which are all lymphatic organs that play a role in the immune system.
Lymphocytes, a type of white blood cell that is produced in the lymphatic system and helps to fight off infection and disease.
It is a network of vessels, tissues and organs that help to rid the body of toxins, waste and other unwanted materials. It also helps to fight against infection and disease.
which of the eukaryotic dna sequences would likely be in a gene family together? choose the most complete answer. (1) 5' atcgtaagcta 3' (2) 5' gctcccca 3' (3) 5' atcgtatcgta 3' (4) 5' atttttttggggg 3' (5) 5' accgtaaggtt 3' please choose the correct answer from the following choices, and then select the submit answer button. answer choices
Explanation:
What means the attttttttttttggggggggg
