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Researchers grew seedlings of corn, Zea mays, in loose and compact sand. The researchers measured the amount of time required for the cells in the growing root tips of the seedlings to double in number. The mean cell doubling times for the two groups of seedlings are shown in Figure 1.Figure 1. Mean cell doubling times for the growing root tips of Zea mays seedlings planted in loose or compact sand
Based on the sample means, which of the following conclusions about the cells in the growing root tips of Zea mays seedlings is best supported by the results of the experiment?
A. The cells of the root tips grow to larger sizes when the seedlings are planted in compact sand than when the seedlings are planted in loose sand.
B. The average rate of mitotic cell division is greater for the root tips growing in loose sand than for the root tips growing in compact sand.
C. The average cell cycle time is greater for the root tips growing in compact sand than for the root tips growing in loose sand.
D. More cells are produced per unit of time in the root tips growing in compact sand than in the root tips growing in loose sand.
Based on the sample, The average rate of mitotic cell division is greater for the root tips growing in loose sand than for the root tips growing in compact sand.
What is mitotic cell devision?
Mitotic cell division is the process by which a single cell divides into two identical daughter cells. This process occurs in all living organisms, and is essential for growth and development. During mitosis, the genetic material within the cell is equally divided between the two daughter cells. This ensures that each daughter cell contains the same genetic material as the original cell.
Therefore, Option B is correct.
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argatroban is a competitive inhibitor of thrombin. which of the following effects on the coagulation cascade is most likely to result from inhibiting thrombin activity with argatroban?
The rate at which fibrin is formed will slow down. This type of anticoagulant medication is a direct thrombin inhibitor.
Which of the following anticoagulants is a direct inhibitor of thrombin?Lepirudin, argatroban, and bivalirudin are a few of the direct thrombin inhibitors. Warfarin, the most widely used oral anticoagulant, prevents the synthesis of coagulation components that are dependent on vitamin K.Argatroban is a direct thrombin inhibitor that binds tenaciously and irreversibly to the thrombin catalytic site and doesn't need any additional cofactors to work as an antithrombotic agent. Argatroban inhibits thrombin in both the circulation and clot-bound states because of its selective inhibitory action.Inhibitors of thrombin can have serious side effects, such as severe heartburn. Nausea. Vomiting In order to lower the risk of cardiac clots, blood thinners (anticoagulants) are typically administered to persons with atrial fibrillation. Anticoagulants known as direct thrombin inhibitors (DTIs) are used to treat atrial fibrillation and other diseases that can result in strokes.To learn more about inhibitor refer to:
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14 43. The diagram below shows the successive positions of a single cilium on the body surface of a paramecium -6 (a) Indicate on the diagram the direction of movement of the paramecium as Il progresses forward. (01 mark) (b) Which of these positions represent the (02 mark) (1) Effective stroke... (i) Recovery stroke.... (c) Describe how exactly effective stroke is achieved in cillary movement. (03 marks) (d) Describe four importances of ciliary movements in animals. (04 marks)
A ciliary beat cycle consists of an effective stroke during which the expanded cilium moves in an oar-like motion to one side, and a recovery stroke during which the cilium moves back by propagating a bend from base to tip.
Explain about the Cillary movement?It is known as ciliary movement when cilia move rhythmically and cause fluid or cell movement. In eukaryotic cells, cilia are a type of bacteria. For instance, the movement of the cilia in Paramoecium helps the cell move around and carry food inside of it.
Both movement and sensory activities are significant tasks carried out by cilia. They are vital for the cell cycle, replication, and the growth of both people and animals. To keep the inside pathways clear of mucus and other unwanted objects, many cilia move in a regular pattern.
The Edinger-Westphal nucleus, a dorsal-rostral region of the oculomotor nucleus, regulates both the iris sphincter and the ciliary muscle.
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using the information from this activity explain why the equation is a vastly oversimplified representation of the actual process.
It's very complex many reactions that are separated specially in temporarily. The equation implies one step to come bind water and CO2 to make glucose and oxygen
what is photosynthesis?
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in form of sugar.
Photosynthesis is critical for existence of the vast majority of life on Earth. It is way in which virtually all energy in the biosphere becomes available to living things.
British physician and scientist who is best known for his discovery of the process of photosynthesis, by which green plants in sunlight absorb carbon dioxide and release oxygen
There is suggestive evidence that photosynthetic organisms were present approximately 3.2 to 3.5 billion years ago, in form of stromatolites, layered structures similar to forms that are produced by some modern cyanobacteria, as well as numerous microfossils that have been interpreted as arising from phototrophs
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fill in the blank. pea plant seed coloration can be white or gray. in this example___would be the trait and___would be a phenotype. group of answer choices white - pea plant color pea plant color- grey or white pea plant color- grey white - grey
In this example pea plant color would be the trait and grey or white would be a phenotype.
What is phenotype?
Phenotype is the physical characteristics of an organism that are determined by its genetic makeup and influenced by environmental factors. It includes observable traits such as physical appearance, development, physiology, and behavior. It can also include biochemical properties such as enzyme activity, gene expression, and gene regulation. It is the result of the interaction between an organism's genotype and its environment.
Therefore, In this example pea plant color would be the trait and grey or white would be a phenotype.
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fill in the blaank. the seemingly crazy word___is the actual name for scientists who study the behaviors and habitats and other factors that influence the reproduction and well-being of sea (water) creatures.
Answer:
Environmental marine biologist.
Explanation:
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which of the following accurately describes the ph scale
The most accurate description of the pH scale is that the lower pH correlates with a higher concentration of hydrogen ions in solution. Thus, the correct option is A.
What is pH scale?The pH scale is used for the measurement of how acidic an object is. Objects which are not very acidic are called as basic substances. The scale of pH has values ranging from zero which is the most acidic value to 14 which is the most basic value. The pure water has a pH value of 7, this denotes that it is a neutral substance. pH can be defined as the power of hydrogen ions present in the solution.
A lower pH value correlates with a higher concentration of the hydrogen ions in that solution. A higher pH value correlates with a higher concentration of hydrogen ions in the solution. And, the solutions with a pH value less than 7 are said to be basic.
Therefore, the correct option is A.
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Your question is incomplete, most probably the complete question is:
Which of the following statements accurately describes the pH scale?
A. A lower pH correlates with a higher concentration of hydrogen ions in solution.
B. A higher pH correlates with a higher concentration of hydrogen ions in solution.
C. Solutions with a pH less than 7 are said to be basic.
D. Solutions with a pH greater than 8 are said to be acidic
E. It measures the tonicity of a solution
estimate the ability of a reverse osmosis plant to reject minerals by calculating the mineral rejection as a percent.
Osmotic Pressure (Π) and is calculated by the equation (Π = TDS/100).
What is reverse osmosis?
Reverse Osmosis is a technology that is used to remove a large majority of contaminants from water by pushing the water under pressure through a semi-permeable membrane.When pressure is added, to the higher level side, that is greater than the current osmotic pressure the flow will be reversed. This reversal allows the contaminant solution to be further concentrated and produces purified water. The adding of pressure to enact the reversal is called Reverse Osmosis or RO.Reverse osmosis is used to produce highly purified water for drinking water systems, industrial boilers, food and beverage processing, cosmetics, pharmaceutical production, seawater desalination, and other applications.To learn more about minerals refers to:
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Meiosis review : Match the terms correctly.
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.
What is Mitosis and Miosis?
Cell division always involves a complex set of stages that are carefully choreographed and highly regulated. While mitosis and meiosis relate to two distinct processes of nuclear division, cytokinesis describes the division of a cell's cytoplasm.
The original nucleus divides into two identical nuclei during mitosis. Contrarily, meiosis produces four nuclei, each of which contains half as many chromosomes as the parent cell. Only the gametes, or cells that develop into sex, the egg and the sperm, go through meiosis in animals.
Number of chromosomes in daughter cells: The two daughter cells that emerge from mitosis are perfect replicas of the parent cell. With 30 chromosomes, each daughter cell will have 30. Each cell (i.e., gamete) would have 15 chromosomes by the conclusion of meiosis II, which is half of the original number.
Purpose and function :Mitosis aims to create daughter cells that are completely genetically similar to their mothers, with no extra or less chromosomes. On the other hand, meiosis serves a single function in the human body: the creation of gametes, or sexual cells such as sperm and eggs.
Some of Other Features are given below
Mitosis
All live cells go through a constant cell division process called mitosis.
Prophase, metaphase, anaphase, and telophase are the four fundamental phases of mitosis.
Asexual reproduction, or mitosis, is the mechanism used to divide cells.
Meiosis
Meiosis is the form of nuclear cell division that results in daughter cells that have one-half the chromosome numbers as the original cell.
In organisms that are diploid, the end result is cells that are haploid. Each daughter cell gets one complete set of chromosomes, i.e., one of each homologous pair of chromosomes.
The germ cells undergo meiosis to give rise to sperm and eggs.
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the colonies growing on blood agar, illustrated in the top image, are small, convex, entire, smooth, and light-yellow pigmented. gram stain revealed short gram-positive bacilli arranged in loose clusters. the key to the identification is the positive lecithinase activity on egg yolk agar (lower image). catalase and oxidase reactions were found to be positive and acid was produced from most carbohydrates. this is a soil organism occasionally causing nosocomial infections related to exposure to contaminated water. from these observations, select the presumptive identification of this isolate.
The majority of Haemophilus species are cultured on blood or chocolate agar plates because they all need at least one of the following blood factors to grow.
Can gram-positive bacteria grow on blood agar?
The hemolysin bacteria can be recognized by looking at the hemolysis in the zone. Gram-positive and Gram-negative bacteria, such as Staphylococcus aureus and uropathogenic E. coli, respectively, can both cause pneumonia and other serious illnesses. Because they are both hemolysin-producing organisms, they can both grow on blood agar.
What kind of agar is necessary to recognize the Haemophilus species that cause hemolysis?
The two species of hemolysis can be distinguished by inoculating the aforementioned cell suspension on heart infusion agar with 5% rabbit blood (or horse blood in the case of the agar infusion base). Additionally, a Haemophilus ID Quad plate may be used (see Section II).
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which of the following processes occurs in meiosis but not in mitosis? which of the following processes occurs in meiosis but not in mitosis? alignment of chromosomes at the metaphase plate chromosome replication condensation of chromosomes synapsis of chromosomes
Synapsis of chromosomes occurs in meiosis but not in mitosis.
What is chromosomes?
Chromosomes are thread-like structures found in the nucleus of most living cells. They are made up of DNA and proteins and are responsible for transmitting hereditary characteristics from parents to offspring. Chromosomes also contain the instructions needed for cells to divide and produce new cells. They come in pairs, with one chromosome from each parent.
Therefore, Synapsis of chromosomes occurs in meiosis but not in mitosis.
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explain why proposing to teach creationism or intelligent
design in high school science classes is legally problematic in this country, and what some of the results of these
attempts have been. Please help !!
ID proponents contend that teaching ID alongside evolution would give pupils a more comprehensive view of science. They assert that evolution is simply a theory with several gaps (such as missing links) that can only be explained by intelligent design.
Why the theory of evolution should not be taught in schools?Since evolution continues to influence and sway students' views and perspectives on modern science, it should not be taught in public schools even when it is freely acknowledged as a theory.There is still another significant role for evolution education. The teaching of evolution provides educators with a fantastic chance to illuminate the nature of science and to distinguish science from other spheres of human endeavor and comprehension since some individuals perceive evolution as at odds with generally held beliefs.As an alternative to evolution or in addition to the theory, creationism is being taught in schools in a number of U.S. states. Right now, teaching evolution is not totally prohibited in any state. The following list of states includes a few instances where evolution has sparked disagreement and discussion.To Learn more About intelligent design refer To:
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Which of the following describes an environmental problem that can result from the combustion of fossil fuels to generate electricity?Carbon dioxide is a product of the combustion fossil fuels, and it can lead to global climate change when released into the atmosphere.
Other environmental problems resulting from the combustion of fossil fuels to generate electricity include air pollution, acid rain, and water contamination.
What do you mean by fossil fuels?
Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. They contain high percentages of carbon and include petroleum, coal, and natural gas. Fossil fuels are non-renewable resources that are used to generate electricity and are the main source of fuel for transportation and industrial activities.
Environmental problems resulting from the combustion of fossil fuels to generate electricity include air pollution, water pollution, and climate change. Air pollution is caused by the release of pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter. These pollutants can cause respiratory and cardiovascular diseases, as well as acid rain. Water pollution is caused by the release of pollutants such as mercury, lead, and arsenic into surface water, which can contaminate drinking water and harm aquatic life. Climate change is caused by the release of greenhouse gases, such as carbon dioxide, into the atmosphere, which can lead to an increase in average global temperature and changes in weather patterns.
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1. Frequency times wavelength always equals
a. 1
b. amplitude
c. speed
d. 1/speed
2. A node is caused by
a. constructive interference
b. destructive interference
c. reflection
d. refraction
3. The speed of sound in steel is greater than it is in air because
steel is
a. more elastic than air
b. less elastic than air
c. more dense than air
d. less dense than air
4. For a wave of wavelength 4 m and frequency 8 waves/sec.,
a. amplitude = 32 m.
b. amplitude = 0.5 m.
c. speed =32 m/sec.
d. speed = 2 m/sec.
One crucial equation that connects them all states that the frequency times the wavelength of any electromagnetic wave equals the speed of light.
Is lambda divided by frequency equal to 1?According to the equation above, frequency is equal to v/c, or 1/c, which is equal to the speed of light. When wavelength is expressed in metres, 1/ stands for the number of waves in a wave train that can be found in a length of one metre, or for the number in a length of one centimeter if wavelength is expressed in centimeters.
What is the formula for wavelength and frequency?The equation v = / T is used to compute speed. Because the frequency, f, is 1/T, the relationship between wave speed, frequency, and wavelength is given by the equation v = f.
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Using at least one credible online source, research two evolutionary mechanisms of your choice. A mechanism is a process or technique for achieving a set result. Using the evidence from your research, explain how the mechanisms that you chose can impact the evolution of a species.
Two evolutionary mechanisms that can impact the evolution of a species are natural selection and genetic drift.
What is the evolution about?Natural selection is the process by which certain traits become more or less common in a population due to the fact that they confer an advantage or disadvantage in terms of survival and reproduction.
Genetic drift is another mechanism that can impact the evolution of a species. Genetic drift is the random fluctuation of allele frequencies in a population due to chance events.
In summary, both natural selection and genetic drift are mechanisms that can impact the evolution of a species. Natural selection is driven by the environment, and it causes certain traits to become more or less common in a population based on their survival and reproduction value. Genetic drift is a random process that can lead to the evolution of new species by altering the genetic makeup of a population.
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mendel was able to discover the principles of heredity because of the following reasons, except: group of answer choices he used traits that only had two phenotypes he communicated with charles darwin about his hypotheses he used the pea plant which allowed fast generation time he used mathematics to analyze his results
Based on theories first put out by Gregor Mendel around 1866, we now understand how inherited qualities are transmitted down through generations. Mendel studied pea, but his theories can be used to understand traits in both plants and animals. They can help us understand how traits like eye color, hair color, and even the capacity to roll our tongues come from our parents.
What has made Mendel famous?He concluded that genes are inherited from each parent as separate, paired units. Mendel observed how parental genes separated and if they showed up either dominant or recessive qualities in the children.
What were Mendel's three laws?Variations in our genes can be used to explain these straightforward variations in the phenotypes, or the trait manifested in an organism. The Law on Dominance and Uniformity, or Law of Segregation, as well as the Regulation of Independent Assortment are some of Mendel's laws.
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summarize the process of dna replication including the enzymes involved and explain the significance
Primer binding, replication fork creation, elongation, and termination are the processes in DNA replication. DNA helicase, RNA primase, DNA polymerase, exonuclease, and DNA ligase are the enzymes involved in this process.
A single double-strand DNA copy is utilized to create two additional double-strand DNAs through the process of DNA replication. Replication goes through four basic stages: (i) replication fork development, (ii) primer binding, (iii) elongation, and termination. In the first step, the double helix of the DNA is opened and separated into two single strands of DNA with the help of the enzyme DNA helicase at a point called the origin. In the second step, the primer is generated with the help of the enzyme RNA primase. This primer binds to the lagging strands of the DNA. In the third step, the synthesis of DNA starts from 5' to 3' in a continuous direction in the leading strand with the help of the DNA polymerase enzyme. And in a discontinuous direction in the lagging strand with the help of RNA primase and Okazaki fragments. In the final step, exonuclease removes all the RNA primer, DNA ligase joins the Okazaki fragments, and telomerase synthesizes small segments or telomeres at the end of the DNA.
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Methods of detecting and identifying intestinal parasites include all of the following except:
A. Molecular methods
B. Wet mounts
C. Permanent stained smears
D. Thin and thin Giemsa smear
The approach used most frequently to identify intestinal parasites from fecal samples is direct wet mount examination. The correct option to this question is B.
In Africa, namely in Ethiopia, the direct wet mount technique is frequently used to diagnose both protozoal and helminthic illnesses.
To view moving organisms, scientists use a technique called the Wet Mount. Material taken from a female patient's vaginal wall is frequently examined using this method.
Wet mounts do have several benefits over slides that are fixedly mounted, including: There is no need for specimen fixation, dehydration, or staining during rapid preparation (but possible, if required). Wet mounts are therefore the type of mounts that trainees learn to build first.
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explain how the change of a single amino acid in hemoglobin leads to the aggregation of hemoglobin into long fibers. (review figures 5.14, 5.18, and 5.19)
The non-polar nature of the specific amino acid is what causes haemoglobin to change amino acids and aggregate into long fibres. Valine is used instead of glutamine in this scenario, which changes how the haemoglobin protein functions.
The sixth amino acid in regular haemoglobin is the acidic glutamic acid (Glu) (which has a negative charge on its side chain). Glu is substituted with valine (Val), a nonpolar amino acid that is extremely unlike Glu, in sickle-cell haemoglobin. The shape and thus the function of a protein are ultimately determined by its primary structure, which is its amino acid sequence. The haemoglobin molecules can combine and create lengthy fibres when Val is changed to Glu, which causes the protein to function improperly and the red blood cell to deform.
Due to a nucleotide error that results in the synthesis of aberrant beta-chains in haemoglobin S, the single amino acid substitution of valine for glutamic acid in the beta-chain causes sickle cell anaemia.
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The Sun is the ultimate source of energy for all life on Earth. How does energy from the Sun get transferred to a top consumer such as a Florida panther? A. The Sun's energy is transferred to plants, then to animals that eat plants, then to the panther. B. The panther is able to absorb the energy directly from the Sun. C. Energy from the Sun is absorbed by plants and is then transferred to the panther when it eats them. D. The Sun's energy is absorbed by decomposers and is then transferred to the panther when it eats them.
The correct answer is Option A. The Sun's energy is transferred to plants then to animals that eat those plants and then to that panther.
The Sun's energy is absorbed by the plants through photosynthesis. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.
Then the plant-eating animals eat these plants. We can call this the first step of the food chain. Energy stored in these plants gets transferred to these animals. The animals that eat plants as their source of food are called herbivores.
These herbivore animals are the source of food for carnivore animals like Florida Panthers. The energy stores in these animals are transferred to a new places. This can be said to be the second stage of the food chain. And this continues.
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Use this classification
Classification Wall
lizard
Chordata
Chordata
Reptilia
Reptilia
Squamata Squamata
Lacertidae Colubridae
Podarcis Lampropeltis Elaphe
table to answer the question below.
Mountain king Taiwan beauty Gray rat
snake
snake
snake
Phylum
Class
Order
Family
Genus
Chordata
Reptilia
Squamata
Colubridae
Chordata
Reptilia
Squamata
Colubridae
Elaphe
Which two organisms shown in the chart are most closely related?
wall lizard and gray rat snake
Taiwan beauty snake and mountain king snake
Taiwan beauty snake and gray rat snake
wall lizard and mountain king snake
The chart provided classifies different organisms according to their Phylum, Class, Order, Family, and Genus. Based on this classification, we can determine which organisms are most closely related.
What are the organisms that closely related to ?According to the chart, the wall lizard and gray rat snake are both classified as Chordata (Phylum), Reptilia (Class), Squamata (Order), Colubridae (Family) and Elaphe (Genus). This means that these two organisms belong to the same Phylum, Class, Order, Family and Genus, indicating that they are most closely related.The Taiwan beauty snake and mountain king snake are also closely related. They both belong to the same Phylum, Class, Order and Family, but they belong to different genus which is Lampropeltis (Taiwan beauty snake) and Podarcis (Mountain king snake)Taiwan beauty snake and gray rat snake are closely related in terms of Phylum, Class, Order, Family but belong to different genus Lampropeltis and Elaphe respectively.The wall lizard and mountain king snake are not closely related as they belong to different Family, Lacertidae and Podarcis respectively.To learn more about organisms refer:
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Which of the following microbes has been genetically engineered to contain a protein that helps protect crops from freezing? A) Bacillus thuringiensis B) Salmonella C) Pseudomonas D) E. coli E) Deinococcus radiodurans
Answer:
C
Explanation:
They were created in 1882, a strictly aerobic, gram-negative bacterium of relatively low virulence. The organism is ubiquitous, with a predilection to moist environments, primarily as waterborne and soilborne organisms.
a virus has been discovered. the virus has no envelope and consists of a helical capsid surrounding its dsdna genome. during assembly, the pac site of the genome ensures that it is properly packaged by the capsomeres. which of the following amino acids is/are expected to be on the capsomere domain that interacts with the pac site?
Rhabdoviruses are an exception to this rule and are RNA viruses that create "ball-shaped" nucleocapsid structures. Animal viruses that exhibit helical symmetry are often these viruses.
Which virus kind displays helical symmetry? Rhabdoviruses are an exception to this rule and are RNA viruses that create "ball-shaped" nucleocapsid structures. Animal viruses that exhibit helical symmetry are often these viruses.Examples of animal viruses with helical symmetry include rhabdoviruses.Supporting viral adhesion to host cells and viral nucleic acid penetration into the host cell.Sharp bumps that project from the surface of the outer envelopes of coronavirus family members are present.The spike proteins that cause those lumps are called.Glycoproteins are what they really are.The presence of a carbohydrate means they do (such as a sugar molecule).A virion is a completely constructed infectious virus.A capsid, a protein coat that serves as a shell to shield the viral genome from nucleases, and nucleic acid (single- or double-stranded RNA or DNA) make up the simplest virions.To learn more about helical symmetry refer
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correctly classify the given food items as either a fruit or a vegetable. if you need help, look at the hint available by clicking view available. drag the foods into the appropriate bins. fruits should be placed in the left bin. vegetables should be placed in the right bin. view available hint(s)
Fruit and vegetable are classified as:
Carrot: Vegetable
Strawberry: Fruit
Tomato: Vegetable
What is Fruit?Fruit is a type of edible plant material derived from the fleshy ripened ovaries of flowers. It is usually sweet and juicey, although some fruits have a sour or tart flavor.
Fruit is a vital source of nutrition, providing essential vitamins and minerals, dietary fiber, and antioxidants. Common types of fruit include apples, oranges, pears, grapes, strawberries, raspberries, blueberries, bananas, watermelons, and cantaloupes.
Fruit is typically eaten raw, though some people choose to cook or process it. It is a popular snack and often served as part of a meal or dessert. Fruit can also be processed into juice, jam, or preserves, and used as an ingredient in sauces, dressings, and other dishes.
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a cell is treated with a drug that prevents the formation of vesicles. which of the following processes depends on the formation of vesicles and would therefore be blocked? view available hint(s)for part a a cell is treated with a drug that prevents the formation of vesicles. which of the following processes depends on the formation of vesicles and would therefore be blocked? alignment of eukaryotic chromosomes at the metaphase plate cytokinesis in a plant cell separation of eukaryotic chromosomes at anaphase cytokinesis in an animal cell
The correct option is C ; cytokinesis in a plant cell separation of eukaryotic chromosomes at anaphase . Endocytosis is the production of vesicles that transport particles and droplets from the outside to the inside of the cell.
Exocytosis is the movement of secretory vesicles from the inside to the exterior of the cell.
COPII, COPI, and clathrin are the three primary coat proteins involved in vesicle production. COPII coat proteins produce vesicles that go from the ER to the Golgi. COPI coat proteins are utilized to connect components of the Golgi apparatus and to generate vesicles that travel from the Golgi to the ER.
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(2018). halide-directed synthesis of square prismatic ag nanocrystals by the polyol method. chemistry of materials. (doi
A critical challenge in the fabrication of bottom-up plasmonic materials is achieving shape control of high-quality metal nanocrystals.
Using a modified polyol method, we create a unique anisotropic Ag nanocrystal shape. The controlled addition of Br- anions during the nucleation and growth process results in single-crystalline Ag square prism nanocrystals with two square facets and four rectangular facets, uniform size distributions, and a high yield (96%).
Br- acts as a reshaping agent in the formation of single-crystalline seed nanoparticles, which then direct anisotropic growth in the 100 direction. Optical absorption spectroscopy, which reveals the localized surface plasmon resonances of the square prisms, is used to monitor nanocrystal growth and shape development.
Electrodynamic simulations show that the high aspect ratio shape causes strong near-field enhancement, implying that these nanocrystals could be used as optical nanoantenna in plasmonic platforms such as surface-enhanced Raman spectroscopy sensors and optoelectronic junctions.
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Complete Question-
Halide-Directed Synthesis of Square Prismatic Ag Nanocrystals by the Polyol Method
the science of nutrition includes the study of factors that affect food availability and choices, the identification of chemical components of food, the action of food chemicals on the body, and the effects of food on health and disease risk. classify each of the factors under the area of nutrition science in which it would be studied.
The study that food, nutrients, and some other food substances as well as how they are consumed and biochemically processed, how they relate to health & disease, and how to use this knowledge to inform programs and policies is known as nutritional sciences.
How should we define nutrition?Eating a balanced, healthy diet is important for nutrition. You can get the nutrition and energy you need from food and beverages. You might find it simpler to choose healthier foods if you understand these nutrition concepts. More definitions can be found at fitness, general health, minerals, nutrition, and vitamins.
What makes nutrition important?A nutritious diet supports normal growth, development, and aging, aids in maintaining a healthy body weight, lowers the chance of developing chronic diseases, and promotes healthy maternal health, all of which contribute to overall health and wellbeing.
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You decide to start a saltwater aquarium. A big one. The tank measures 15m by 25m by 30m and has a filtration system that pumps 3000L per hour. How long does it take for all the saltwater in your aquarium to completely cycle (i.e., what is its residence time) in hours? There are 1000L in 1 m3.
Answer:
3750 hours
Explanation:
Its a bit of a stretch to call this a biology question, nonetheless
Volume - 15 x 25 x 30 = 11, 250 m³
Total water in full tank = 11, 250 m³ x 1000 L = 11, 250, 000 L
Complete cycle = 11, 250, 000 L/3000 L = 3750 hours
Match the correct term to the examples to apply your understanding of the three different types of epidemics. Point-source epidemic The potato salad at the company picnic was left out too long and later that night, 36 people experienced vomiting and diarrhea. Common-source epidemic The cantaloupes from a farm in Colorado sickened people with listeriosis over the course of several months. Propagated epidemic HIV has spread across the U.S. since the first diagnosis in the 1980s.
Examples of epidemics include smallpox, measles, polio, yellow fever, and smallpox. It's not necessary for an epidemic disease to be communicable. Other epidemics include West Nile fever and the sharp rise in obesity rates.
Is malaria on the rise?Malaria epidemics happen all across the world, and the aetiologies behind them are as varied as the endemic regions' climatic conditions, terrain, and vector ecology.
Cholera is endemic, not epidemic.EPIDEMIOLOGY. Cholera may cause catastrophic epidemics and is endemic to around 50 countries, mostly in South and Southeast Asia and Africa. However, the majority of cases go unreported.
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SB6.b
Where do new adaptations come from? There is more than one correct answer - choose
all that apply!!
A. Mutations in the DNA passed on to an organism
B. Nature will give an organism the adaptations it needs to survive
C. An organism can choose to grow an adaptation
D. New combinations of genes from the parents
New adaptations result from changes in the organism's DNA over time.
Evolution is the cause of adaptation. Evolution causes a species to change over a long period of time. Usually, mutations or unintentional gene alterations result in adaptations. Depending on the mutation, a plant or animal may be able to live longer than other members of its species.
Where do fresh adaptations come from?New variation arises through mutations. Natural selection does not create new features; it only modifies the level of variation already existing in the population. The recurrent two-step interaction of these processes leads to the evolution of novel adaptive characteristics.
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