What class is the sting ray in?

MRSA is an example of directional selection in humans.

Methicillin-Resistant Staphylococcus aureus, also known as MRSA, is a kind of bacteria that can be potentially dangerous since it is resistant to some antibiotics and can cause skin infections and other types. Any S strain could be it. aureus that has acquired multiple drug resistance to beta-lactam antibiotics through horizontal gene transfer or directional selection.

Direct contact with an infected individual, touching surfaces or objects contaminated with the bacterium or exchanging personal things like infected towels or razors are all ways that MRSA is disseminated. Because so many people have weakened immune systems, it is therefore spreading quickly and directly throughout the healthcare industry.

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Answer: I believe tigers, also known as "Panthera tigris" are important to humans because they balance the ecosystem. When creatures go extinct they leave behind a scar that affects the ecosystem that is around them. Since Tigers are secondary consumers they control natural prey populations. The connection to the food web is very important and essential to keep this food web stable. Once something goes extinct it will cause the food web to shift and some primary producers will go out of control.

Explanation: Not sure if this helped at all this is just what I know about the food web. Panthera Tigris are secondry consumers so they control the primary producer population. This is just basic food web and ecosystem thinking. This is how they impact humans if they go extinct.

Answer: Molecule: Some molecules, such as carbon dioxide and oxygen, can diffuse across the plasma membrane directly, but others need help to cross its hydrophobic core. In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers.

Glucose:Glucose cannot move across a cell membrane via simple diffusion because it is simple large and is directly rejected by the hydrophobic tails. Instead it passes across via facilitated diffusion which involves molecules moving through the membrane by passing through channel proteins.

Starch: Starch does not pass through the synthetic selectively permeable membrane because starch molecules are too large to fit through the pores of the dialysis tubing. ... Diffusion results from the random motion of molecules. Diffusion moves substances from regions of higher concentration to regions of lower concentration.

Protein: Can all membrane proteins diffuse freely around the membrane? Many, but not all membrane proteins can diffuse laterally through the lipid bilayer. Some proteins cannot do this because of their attachment, either to other proteins or to the underlying cytoskeletal filaments.

Iodine: The Dialysis tubing provides a semi-permeable membrane. Only allowing smaller molecules to pass through it. Iodine molecules are small enough to pass freely through the membrane, however starch molecules are complex and too large to pass through the membrane. ... Thus iodine diffused into the tube with the starch.

Water: Water also diffuses away from areas of high free water concentration into areas of more solute concentration. ... Thus, only water can diffuse. This diffusion of water across a semi-permeable membrane is called osmosis.

Salt: In turns out when salts are exposed to water, they dissolve into charge atoms (called ions). These atoms are very tiny and mobile and can easily diffuse from the surface past the meat molecules, given enough time.

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The genotypes of two parents for trait r is the mendelian trait in humans for tongue rolling. the allele for the ability to roll the tongue (r) is dominant over the allele for the inability to roll the tongue (r). The mother's genotype The mother is heterozygous (Rr) for the tongue-rolling trait.

There are two main types of genotypes that is  homozygous and heterozygous. If an organism is homozygous for a gene, referred that they inherit two of the same versions of the gene. If an organism has a heterozygous genotype, referred that they inherit two different versions of a gene.

Genotype referred to the genetic makeup of an organism which described about an organism's complete set of genes. It is used to refer to the  variant forms of a genes that are carried by an organism. The ability to roll the tongue is dominant over the allele for the inability to roll the tongue.

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Answer: b

Explanation:

The components of a lichen are photosynthetic microorganisms (algae or cyanobacteria) and fungi.

Lichens are composite organisms consisting of a symbiotic relationship between photosynthetic microorganisms, such as algae or cyanobacteria, and fungi.

Photosynthetic microorganisms, also known as photobionts, provide the lichen with the ability to produce food through photosynthesis. They capture sunlight and convert it into energy-rich organic compounds.

The fungi, known as mycobionts, provide the structural framework and protection for the lichen. They create a physical structure that holds the photosynthetic microorganisms in place.

The fungi also play a crucial role in absorbing and retaining moisture, which is important for the survival of the lichen in various environmental conditions.

The symbiotic relationship between the photosynthetic microorganisms and fungi is mutually beneficial. The fungi provide a suitable habitat and nutrients for the photosynthetic microorganisms, while the microorganisms contribute to the lichen's energy supply.

Lichens are capable of colonizing a wide range of habitats, including rocky surfaces, trees, and soil. They can survive in extreme environments where neither the photosynthetic microorganisms nor the fungi could survive individually.

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Answer:

A specific question that could be used to start a scientific investigation is A. Do long droughts increase the likelihood of forest fires. This question can be tested and answered through scientific methods and data collection.

After osmosis occurs in beaker A, the cell would be larger compared to its size at the start of the experiment.

Osmosis is the process in which solvent molecules move from an area of high concentration to an area of low concentration across a selectively permeable membrane. In this experiment, water moves into the cell, which has a higher solute concentration than the surrounding solution in beaker A. As a result, the cell swells and increases in size. If this process continues, the cell may burst due to the excess influx of water, leading to cell death. Therefore, it is important to maintain the balance of solutes and water inside and outside the cell.

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Answer:

The dog breeder to check for all the details that meets her requirement of dogs.

Explanation:

A dog breeding is the practice of mating dogs. In the context, it is given that a dog breeder wants to purchase a male dog of three year old for her business and she founds an advertisement on the net about a purebred males that costs $700. Now before buying this purebred male dog, the dog breeder should first of all check whether the seller who is selling online is a licence breeder or not.

The dog breeder should also check whether the dog is a purebred or not and should also find out the actual age of the dog. The health of the dog should be checked by an professional vet before buying the dog.

The selling of dogs, either a hybrid or a purebred costs differently. An individual should check the license and health of the dogs before purchasing.

In the given example, the dog breeder is trying to purchase a three-year male dog. She saw an advertisement that the male dog is available at the rate of dollars 700.

Before purchasing the dog, the breeder should check:

Thus, the breeder should check all the authenticity of the dog and its health.

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Explanation:

Form and function are intimately related in human cells. The shape and structure of cellular components are often specifically designed to carry out their respective functions effectively. For example, red blood cells are disc-shaped with a concave center, which increases their surface area for efficient oxygen and carbon dioxide exchange. Neurons have long, branching extensions called dendrites and axons, allowing them to transmit electrical signals over long distances.

Epithelial tissues are composed of closely packed cells that form protective barriers and linings in the body. They cover external surfaces (such as the skin) and line internal organs and cavities (such as the digestive tract). In contrast, muscle tissues consist of cells that are specialized for contraction and movement. There are three types of muscle tissues: skeletal muscle, responsible for voluntary movements; cardiac muscle, found in the heart; and smooth muscle, which controls involuntary movements in organs like the intestines.

Epithelial tissues primarily function in protection, absorption, and secretion. They have tightly packed cells with minimal extracellular matrix. In contrast, muscle tissues are specialized for contraction and movement. They contain long, elongated cells (muscle fibers) that can generate force. Skeletal muscle is striated and allows for voluntary movements, while cardiac and smooth muscles have different structures and functions specific to their respective roles in the body.

In summary, the relationship between form and function is evident in human cells. Cellular structures are designed with specific shapes and arrangements to perform their functions efficiently. Epithelial tissues provide protective barriers and linings, while muscle tissues enable contraction and movement. Understanding the relationship between form and function helps us appreciate the intricate design of cells and tissues in the human body.

Answer: Translation takes place inside structures called ribosomes, which are made of RNA and protein. Ribosomes organize translation and catalyze the reaction that joins amino acids to make a protein chain. A ribosome is shown with mRNA and tRNA.

Explanation:

Hope it helps you if not sorry

The overall purpose of meiosis is to produce gametes, or reproductive cells, with half the number of chromosomes as the parent cell. Meiosis occurs in specialized cells called germ cells, which are found in the ovaries and testes of sexually reproducing organisms.

Meiosis is a type of cell division that reduces the number of chromosomes in a parent cell by half to produce four haploid daughter cells. This process is essential for the formation of gametes, or sex cells, during sexual reproduction.

During meiosis, the DNA of the parent cell is replicated, and then the cell undergoes two rounds of division, resulting in four daughter cells with half the number of chromosomes as the parent cell. This allows for genetic diversity and ensures that offspring receive a unique combination of genetic material from both parents.

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The equation of the reaction of photosynthesis is:

Light energy + chloroplast + water+ carbon dioxide ---> chemical energy (ATP) + glucose + oxygen

Plants and other living things employ a process called photosynthesis to transform light energy into chemical energy that can then be released through cellular respiration to power the organism's activities.

Light energy is gathered and utilized during photosynthesis in green plants to transform water, carbon dioxide, and minerals.

The equation of the reaction of photosynthesis can be written below as follows:

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Answer:

b.

Explanation:because means same genes and the parents have the same genes

The best explanation for the change in the bass size is Natural Selection.

The presence of a predator made the larger bass more susceptible and so more likely to be preyed upon. Larger bass would gradually be eliminated from the population through selective breeding, allowing smaller fish to procreate and pass on their genes.

Over several generations, this would cause the population's average size to decline. Natural selection is therefore the most plausible cause of the variation in bass size.

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Answer:

Autolysis would likely occur meaning it would digest the entire cell

The surface lesion described as a small, solid, circular, raised spot is called a papule, option (b) is correct.

Papule is a skin abnormality that is less than 1 centimeter in diameter and is elevated above the skin surface. They are typically firm to the touch and can have various colors, including pink, red, or brown. Papules often result from localized inflammation or cellular growth in the skin layers. Common causes of papules include acne, insect bites, and certain skin conditions such as eczema or psoriasis.

Unlike pustules, which contain pus, papules do not have a visible fluid-filled center. Diagnosis of a papule may involve visual examination by a healthcare professional, and further tests or evaluations may be required to determine the underlying cause, option (b) is correct.

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The complete question is:

Which surface lesion is a small, solid, circular, raised spot?

a. papule

b. pustule

c. cyst

d. macule

Option A best explains how some influenza A viruses have genetic material from a variety of host species. Influenza A viruses are known to infect birds, pigs, and humans.

When two different influenza A viruses infect the same host cell, the genetic material from these viruses can recombine, resulting in a new strain with genetic material from both viruses. This process is called reassortment and is more likely to occur in intermediate hosts like pigs, which can be infected with both bird and human influenza viruses. The reassortment of genetic material can lead to the emergence of novel strains of influenza A viruses that can cause pandemics in humans, as seen in the H1N1 swine flu pandemic of 2009. Therefore, the recombination of viral genetic material in intermediate hosts is an important factor in the evolution and spread of influenza A viruses.

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Answer:

I think it is d

Explanation:

Intronic sequences in eukaryotic cells are not translated into proteins because they do not contain the necessary information for protein synthesis.

Eukaryotic genes consist of exons (coding regions) and introns (non-coding regions). During transcription, the entire gene is copied into RNA, including the intronic sequences. However, before the RNA is translated into protein, the intronic sequences are removed through a process called splicing. Only the exonic sequences are then used to produce a functional protein. This is because intronic sequences do not contain the necessary information for protein synthesis, such as start and stop codons.

In conclusion, intronic sequences in eukaryotic cells are not translated into proteins because they do not contain the information needed for protein synthesis. The splicing process removes these sequences, leaving only the exonic sequences to produce functional proteins.

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Answer:

if you meant "who" its George Washington

Explanation:

If you meant "how" George Washington (February 22, 1732 – December 14, 1799) was an American political leader, military general, statesman, and founding father who served as the first president of the United States from 1789 to 1797. Previously, he led Patriot forces to victory in the nation's War for Independence.He presided at the Constitutional Convention of 1787, which established the U.S. Constitution

The correct answer is (d) egg cells. Egg cells, also known as oocytes or ova, possess several features that make them suitable for biochemical studies of the cell-cycle control system.

These features include their large size and arrest in a G2-like phase. Egg cells are typically larger in size compared to other cell types, which makes them easier to handle and manipulate during biochemical experiments. Their large size also allows for the extraction of sufficient amounts of cellular material for analysis. Eggs, or oocytes, possess several advantageous characteristics that make them ideal for studying the cell-cycle control system in biochemical studies. Eggs are considerably larger in size compared to other cell types, providing ample material for experimental analysis. Additionally, eggs naturally undergo arrest in a G2-like phase, allowing researchers to easily synchronize and study specific stages of the cell cycle. This property simplifies the investigation of cell-cycle regulatory mechanisms and facilitates the identification of key molecules involved in controlling the progression of the cell cycle.

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Answer:

yes

Explanation:

The consequences of genetic drift are numerous. It leads to random changes in allele frequencies. Drift causes fixation of alleles through the loss of alleles or genotypes. Drift can lead to the fixation or loss of entire genotypes in clonal (asexual) organisms

Answer:

I think its each gene pair for a different sex cell

Explanation:

i'm not 100% on this, if its wrong im very sorry

The rhesus D (RhD) antigen is what determines whether a person is RhD positive or RhD negative. It's a chemical that's present on the outside of red blood cells. RhD positive individuals are those who have the RhD antigen, while RhD negative individuals do not.

The autosomal codominant inheritance pattern for the ABO blood type. The O allele is recessive, whereas the A and B alleles are codominant.

Even when combined with a Rh-negative gene, the Rh-positive gene prevails because it is dominant (stronger). The blood's Rh factor will be positive if a person possesses the + + gene combination.

The numerous blood types are created by various combinations of these three alleles.

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Answer:

Enzymes obtained by a microbial process are mixed with detergents because it makes the cleaning process efficient. The addition of enzymes to detergents makes them efficient in removing dirt with an added advantage of being able to work at lower temperatures.

Explanation:

Hope this right.But if it's wrong,im so sorry...

Have a nice day

It would be the pacific plate.

To the left of the North American plate and South American, is the pacific plate which shares its border with both plates.

You had chosen the African plate it appears, however it only shares a border with the South American plate, not the North American plate.

Hope that helps!

Answer:

u need co2 cuz ur brain cells is week