. K-12 schools had to immediately switch to a fully online curriculum following shutdowns from COVID-19. This is an example of what type of change?

A. radically innovative change

B. innovative change

C. natural change

D. adaptive change

Answer:

pipetide bond

Explanation:

two amino acids are always joined together by a pipetide bond

The statement for mistake make to organize his notes about mixtures is "Although it is possible to have more than one state, it is also possible to have only one state."

A mixture is really a material made up of two or more simpler components that are not chemically linked.

Moreover, individual substances preserve their qualities in a mixture, but their characteristics can change if they create a compound; when mixed, individual substances keep their properties in a mixture, but their properties can change if they form a compound.

Therefore, when matter is mixed, such as with clouds, it can have qualities from multiple states. Hence, the correct answer is although it is possible to have more than one state, it is also possible to have only one state.

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Answer:

1.) Deletions

2.) Insertions

3.) Base substitutions

Explanation:

Hope this helped!

Have a supercalifragilisticexpialidocious day!

Answer:

Hi. You have not informed the experiment that this question relates to, making it difficult to respond to your query. However, I looked up your query on the internet and found one similar to yours that included an experiment that measured the volume of balloons inflated by people's breath.

The volume of the balloons remains constant throughout the number of tests, according to the results of the experiment. This is due to the fact that when we blow, our lungs prefer to express the same amount of air as when we breathe in regular settings. This is most likely due to the fact that all of the balloons were filled with air when the participants were in the same physical and mental condition, i.e., calm and still, causing the volume of air they breathed and emitted to remain constant. If the individuals in the experiment were exerting some physical effort or were stressed and concerned, the amount of air would be different.

The following calculation can be used to calculate the percentage of the absorbance at 280 nm that is due to DNA: DNA percentage equals [(A280/A260) - (A280/A260)protein] DNA (A280/A260) and protein (A280/A260) x 100

For DNA, a ratio of 1.8 is considered "pure"; for RNA, a ratio of 2.0 is considered "pure." It may indicate the presence of protein, phenol, or other pollutants that absorb heavily at or near 280 nm if the ratio is noticeably reduced in either situation.

The sample is either contaminated by protein or a reagent like phenol, or there was a problem with the analysis, according to abnormal 260/280 ratios.

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Answer:

Yeast budding. Binary fission. Replacement of worn out tissues.

Explanation:

Answer: more precipitation

Answer:

B. more precipitation

Explanation:

The soil needs more rain or the organic material will die.

gpi-anchoring serves a special function, especially in polarized epithelial cell because this modification serves to target proteins to the RER (rough endoplasmic reticulum).

what is RER?

Rough endoplasmic reticulum (RER), a network of interconnected flattened sacs that is an organelle with a continuous membrane found in the cytoplasm of eukaryotic cells and is essential for protein production.

The RER is linked to numerous functions in protein production, including sorting, folding, and post-translational modifications. The mature

Answer:

1a, 2b, 7f, 4d, 3g, 5c, 6e

Explanation:

Answer:

meiosis produced gametes

Explanation:

During sexual reproduction, meiosis generates genetic variation in offspring because the process randomly shuffles genes across chromosomes and then randomly separates half of those chromosomes into each gamete. The two gametes then randomly fuse to form a new organism.

Hope it right

Answer:

Have both clockwise and anticlockwise directions and warmer temperature.

Explanation:

Atlantic oceans have a circular pattern of surface currents that moves in the clockwise direction in the Northern Hemisphere and counterclockwise direction in the Southern Hemisphere while on the other hand, the temperature of the Atlantic basin is warm and having high salinity in the water. The Atlantic Ocean has about 9 degrees Celsius more warmer than the water of Pacific Ocean that leads to the warmer climate of Atlantic basins.

Answer:

Sun - Solar system - Local group - Milky way galaxy - Universe

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Thank You!

Answer:

sun

Explanation:

The correct answer is "carrier proteins." Facilitated diffusion is a passive transport process that allows the movement of specific molecules across a cell membrane, from an area of higher concentration to an area of lower concentration, with the help of carrier proteins.

These carrier proteins act as transporters, facilitating the movement of certain molecules that cannot easily pass through the lipid bilayer of the cell membrane.

Carrier proteins undergo conformational changes to bind with the specific molecule being transported and then release it on the other side of the membrane. These proteins are selective and can transport specific molecules or groups of molecules, such as ions, sugars, or amino acids.

Lipid carriers and carbohydrate carriers are not terms commonly associated with facilitated diffusion. Lipid carriers typically refer to lipoproteins that transport lipids in the bloodstream. Carbohydrate carriers are not a recognized term in the context of facilitated diffusion.

Therefore, facilitated diffusion relies on carrier proteins to enable the transport of specific molecules across the cell membrane. These proteins play a crucial role in facilitating the movement of substances that would otherwise face difficulty crossing the membrane through simple diffusion.

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Facilitated diffusion is a process wherein substances move down their concentration gradient aided by carrier proteins in the cell membrane.

Facilitated diffusion is a process in which substances move down their concentration gradient with the help of carrier proteins embedded in the cell membrane.

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False. In biofiltration of wastewater, air discharge from a treatment facility is passed through a damp porous membrane that causes contaminants to dissolve in water and be transformed into harmless products.

This statement is wrong because, in biofiltration of wastewater, air discharge from a treatment facility is passed through a damp porous membrane that causes contaminants to dissolve in water and be transformed into harmless products.

Biofiltration is an air pollution control technology that uses microorganisms to break down pollutants into non-toxic substances. Biofiltration technology can be used for a variety of applications, including odour control, volatile organic compound removal, and hazardous air pollutant reduction. Biofilters, bio-scrubbers, and bioswales are all examples of biofiltration systems.

Biofilters are used in the biofiltration process to remove pollutants from the air. The biofilter is typically a fixed-bed or trickling filter that contains a moist organic media such as compost, soil, or peat. The pollutants are adsorbed onto the organic media's surface, where microorganisms such as bacteria, fungi, and algae break them down into non-toxic substances.

Biofiltration technology is being employed in wastewater treatment as well. In wastewater treatment, biofilters are used to remove contaminants from the water. Biofiltration is an environmentally friendly and cost-effective method of treating wastewater. Biofiltration aids in the removal of pollutants from the water. Biofilters are commonly used in wastewater treatment to remove organic pollutants such as nitrogen, phosphorus, and carbon compounds.

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a. All their three children do not have the disease: 27/64

b. One or more of their three children have Tay-Sachs disease: 37/64

c. All three children have the Tay-Sachs disease: 1/64

d. At least one child is phenotypically normal without the disease: 63/64

a) The probability that all three children do not have the disease can be calculated using the probability of each child being unaffected, which is the complement of the probability of having the disease.

Since both parents are carriers, they have a 1/4 chance of passing on the disease allele and a 3/4 chance of passing on the normal allele.

Probability of each child being unaffected = (3/4) * (3/4) * (3/4) = 27/64

b) The probability that one or more of their three children have Tay-Sachs disease can be calculated by subtracting the probability of none of the children having the disease from 1.

Probability of at least one child having the disease = 1 - Probability of none having the disease

Probability of none having the disease = (3/4) * (3/4) * (3/4) = 27/64

Probability of at least one child having the disease = 1 - 27/64 = 37/64

c) The probability that all three children have Tay-Sachs disease can be calculated using the probability of each child having the disease, which is 1/4.

Probability of all three children having the disease = (1/4) * (1/4) * (1/4) = 1/64

d) The probability of at least one child being phenotypically normal without the disease can be calculated by subtracting the probability of all three children having the disease from 1.

Probability of at least one child being phenotypically normal = 1 - Probability of all three having the disease

Probability of all three having the disease = (1/4) * (1/4) * (1/4) = 1/64

Probability of at least one child being phenotypically normal = 1 - 1/64 = 63/64

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New mutations in prokaryotic populations contribute to significant genetic variation in each generation, despite their rarity on a per gene basis due to their rapid rate of reproduction and mechanisms like Horizontal gene transfer.

Prokaryotic populations, which include bacteria and archaea, reproduce rapidly and in large numbers. During the process of DNA replication, errors can occur, leading to the introduction of new mutations in the genetic material. While individual mutations may be rare on a per gene basis, the sheer number of individuals in a prokaryotic population means that mutations can accumulate at a relatively high rate.

Prokaryotes have short generation times and can undergo multiple generations within a short span of time. This rapid reproduction allows mutations to arise frequently and be passed on to subsequent generations. Additionally, prokaryotes often possess mechanisms such as horizontal gene transfer, where genes can be exchanged between individuals or acquired from the environment. This further increases the potential for genetic variation within the population.

Although most mutations are neutral or detrimental, some can provide a selective advantage in certain environments. These advantageous mutations can lead to increased survival and reproduction of individuals carrying them, resulting in the expansion of their genetic traits within the population. Over time, this process of mutation, selection, and replication can lead to the accumulation of considerable genetic variation in prokaryotic populations, despite the rarity of individual mutations.

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When sodium channels open in response to a stimulus, an excitatory postsynaptic potential (EPSP) takes place. As a result of the electrochemical gradient, sodium floods the cell.

Excitatory postsynaptic potentials (EPSPs) are connected to transmitter-induced increases in the synaptic membrane's Na+ and K+ conductance, which cause the membrane to depolarize and allow for the net entry of positive charge carried by Na+.

EPSP: The passage of glutamate or aspartate ions causes EPSP to be produced. IPSP: Glycine or GABA flow causes IPSP to occur.

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Number of potential reading frames that are present in mRNA molecule is three.

In molecular biology, reading frame is a way of dividing the sequence of nucleotides in a nucleic acid molecule into a set of consecutive and non-overlapping triplets. These triplets equate to amino acids or stop signals during translation and they are called codons.

The mRNA is single-stranded and therefore only has three possible reading frames, of which only one is translated. Codons of the mRNA reading frame are translated in 5′→3′ direction to amino acids by a ribosome to generate a polypeptide chain.

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When an organism is able to better survive in an environment due to a new mutation, we can conclude that the mutation occurred randomly and was not caused by the environment. This could not happen, as mutations are always deleterious (and would not improve survivorship) (Option B)

Mutations are random events that occur during DNA replication and can be beneficial, neutral, or deleterious. It is possible for a mutation to improve survivorship if it confers an advantage in the environment. Additionally, the mutation may not necessarily be the final mutation in an adaptive walk as multiple mutations may be necessary for adaptation. The location of the mutation may also vary and could occur in coding or non-coding regions of DNA. Thus, mutations can be beneficial, neutral, or deleterious, and in this case, the mutation has improved the organism's survivorship.

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The properties of the plasma membrane that contribute to its selective permeability are the Phospholipid bilayer, Membrane proteins, and Cholesterol.

The plasma membrane is selectively permeable, which means it allows some substances to pass through while preventing others from entering or leaving the cell. The following properties of the plasma membrane contribute to its selective permeability:

(1) Phospholipid bilayer: The plasma membrane is composed of a double layer of phospholipids, with hydrophilic (water-loving) heads facing outward and hydrophobic (water-fearing) tails facing inward. This structure creates a barrier that prevents the movement of hydrophilic molecules, such as ions and polar molecules, through the membrane.

(2) Membrane proteins: The plasma membrane contains a variety of proteins that are embedded within the phospholipid bilayer. These proteins have different functions, including the transport of specific molecules, enzymatic activity, signal transduction, and cell-cell recognition. The presence of specific transport proteins, such as channels and carriers, allows the membrane to regulate the movement of certain molecules in and out of the cell.

(3) Cholesterol: Cholesterol molecules are interspersed within the phospholipid bilayer, which helps to maintain membrane fluidity and stability. This property allows the plasma membrane to selectively adjust its permeability depending on the needs of the cell.

Together, these properties allow the plasma membrane to selectively permit the passage of certain molecules while blocking others. This process helps to maintain the internal environment of the cell and to regulate the movement of substances in and out of the cell.

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Answer:

Large areas of the earth with similar climate and ecosystems are called biomes.

Explanation:

Biomes are defined as areas of the planet with common characteristics, such as animal and plant species, as well as climate, which is why it is called a bioclimatic landscape.

When a relationship is established between an ecosystem —with all its biotic and abiotic components— and the climate in a given area, reference is made to a biome. Consequently, a biome represents large areas of land with similar geographical, climatic and biological conditions.

The other options are not correct because:

Answer:

B

Explanation:

Because it's the fertilisers contain chemical which is not healthy and organic.

El sistema respiratorio tiene una función vital en la supervivencia de los seres humanos y otros organismos. Es responsable de tomar oxígeno del ambiente y exhalar dióxido de carbono y otros gases de desecho.

Los principales gases que utiliza el sistema respiratorio para llevar a cabo su función son el oxígeno y el dióxido de carbono.El oxígeno es un gas vital para el cuerpo humano y es utilizado por las células del cuerpo para producir energía a través del proceso de respiración celular.

El oxígeno entra en el cuerpo a través de la inhalación y se une a la hemoglobina en los glóbulos rojos en el sistema circulatorio para ser transportado a las células del cuerpo. Una vez que el oxígeno es utilizado por las células, se convierte en dióxido de carbono y se transporta de regreso al sistema respiratorio.El dióxido de carbono es un gas de desecho producido por el cuerpo humano durante el proceso de respiración celular.

El dióxido de carbono se une a la hemoglobina en los glóbulos rojos y se transporta de regreso al sistema respiratorio para ser exhalado del cuerpo. La eliminación adecuada del dióxido de carbono del cuerpo es esencial para mantener un equilibrio ácido-base saludable.

En resumen, el sistema respiratorio utiliza principalmente oxígeno y dióxido de carbono para llevar a cabo su función vital en el cuerpo humano y otros organismos.

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Answer:

The correct answer is C. Forest fires

Answer:

A abiotic disturbance is a disturbance that is not caused by living organisms. Based on that definition, the correct answer would be:

Forest fires

Explanation:

Forest fires are an example of an abiotic disturbance because they are typically caused by non-living factors such as lightning strikes, volcanic activity, or human activity. While forest fires can have an impact on living organisms and ecosystems, they are not caused by living organisms themselves.

The other options listed in the question are examples of biotic disturbances:

Invasive plants are living organisms that can disrupt ecosystems by outcompeting native species for resources.

Bacterial disease and 4. Fungal disease are caused by living microorganisms that can affect the health and survival of plants and animals.

Therefore, the correct answer to the question is 3. Forest fires.    

Undesired polysubstitution of an aromatic nucleus is most likely to be encountered in the case of Friedel-Crafts alkylation, option A is correct.

Friedel-Crafts alkylation is a common reaction used to introduce alkyl groups onto an aromatic ring. It involves the reaction of an alkyl halide with an aromatic compound in the presence of a strong Lewis acid catalyst, such as aluminum chloride.

However, the reaction can be problematic because it can lead to the undesired formation of polyalkylated products, especially in cases where the aromatic ring is very reactive, such as with phenols. This is due to the fact that once one alkyl group is attached to the ring, the ring becomes more electron-donating, making it more reactive and prone to further substitution, option A is correct.

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Answer:

Bacterial cells do not have a nucleus. They also lack membrane-bound organelles, such as mitochondria or chloroplasts. The DNA of a bacterial cell is also different from a eukaryotic cell.

Explanation:

Eukaryotic cells are by definition those that have a membrane-bound nucleus, a morphological component that is absent from bacterial and archaeal cells.

Eukaryotic cells are distinguished by numerous membrane-bound structures in addition to the nucleus, including the endoplasmic reticulum, Golgi apparatus, chloroplasts, mitochondria, and others.

Prokaryotic cells lack membrane-bound structures, whereas eukaryotic cells do, including the nucleus.

The existence of mitochondria and chloroplasts, the cell wall, and the makeup of chromosomal DNA are all examples of differences between the cellular structures of prokaryotes and eukaryotes.

Therefore, prokaryotic cells are the name for bacteria's cells. Eukaryotic cells are cells that are found in mammals, plants, and fungi.

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