What allows a virus to bind to receptors on a host cell?

Answer:

Amino acids are the basic building blocks of proteins, and they serve as the nitrogenous backbones for compounds like neurotransmitters and hormones. In chemistry, an amino acid is an organic compound that contains both an amino (-NH2) and carboxylic acid (-COOH) functional group, hence the name amino acid. Proteins are long chains or polymers of a specific type of amino acid known as an alpha-amino acid. Alpha-amino acids are unique because the amino and carboxylic acid functional groups are separated by only one carbon atom, which is usually a chiral carbon. In this article, we will solely focus on the alpha-amino acids that make up proteins

Explanation:

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Answer:

Due to over-pumping of water.

Explanation:

The aquifer around the Los Angeles are in California could be susceptible to an impact by a Tragedy of the Commons because the people used more water than the aquifer receives. The excess use of water from the aquifer through the well causes depletion of water which results in the shortage of water to fulfill the needs of existing population so it is wise to use water efficiently and used lower or equal water the aquifer receives in order to maintain level of aquifer.

Answer:

2

Explanation:

Answer:

D) 22 units

Explanation:

15-(-7)=22

Answer:

-DNA consists of genes that give instructions for making proteins.

The independent variable is the only factor that a scientist varies for different groups in an experiment. This variable is manipulated in different treatments.

The independent variable is the variable that the researcher can manipulate in order to observe the results of a given experiment

The dependent variable is directly affected by the modifications in the independent variable.

In an experiment, the independent variable can be considered as the cause, whereas the dependent variable represents the effect.

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Answer: Varies for different groups in an experiment

Explanation: An independent variable will always be different when tested by scientists

The correct sequence of renal tubule segments through which filtrate would flow is B. proximal tubule, descending limb of nephron loop, ascending limb of nephron loop, distal tubule.

The kidney consists of three primary sections: renal cortex, renal medulla, and renal pelvis, the renal tubule is a portion of the nephron that carries a filtrate away from the glomerulus. Each nephron in the kidney has a renal tubule, which is divided into four different regions. The four regions are the proximal convoluted tubule, the loop of Henle, the distal convoluted tubule, and the collecting duct. The proximal tubule is the segment of the renal tubule that immediately follows Bowman’s capsule and is responsible for most of the reabsorption of nutrients and ions from the glomerular filtrate.

The descending limb of the loop of Henle is the second segment of the renal tubule, which is responsible for reabsorbing water. The third segment of the renal tubule is the ascending limb of the loop of Henle, which is responsible for reabsorbing ions, particularly Na⁺ and Cl⁻. The final segment of the renal tubule is the distal tubule, which is responsible for reabsorbing additional ions and regulating the pH of the urine. So therefore the correct answer is B. proximal tubule, descending limb of nephron loop, ascending limb of nephron loop, distal tubule.

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The filtrate in the renal tubule flows in the sequence: Proximal tubule, descending limb of nephron loop, ascending limb of nephron loop, and distal tubule, finally reaching the collecting duct where it gets converted into urine. These segments allow the reabsorption of water and useful substances, along with the expulsion of waste substances.

The correct sequence of renal tubule segments in which filtrate would flow in the human body is: Proximal tubule, descending limb of nephron loop, ascending limb of nephron loop, distal tubule, and then the collecting duct. Kidney filtration starts at the Bowman's capsule which then passes it to the proximal tubule, the descending and ascending limbs of the nephron loop (Loop of Henle), followed by the distal tubule, and finally the collecting duct where it is converted into urine. The filtrate moves through these consecutive segments in order, a process which allows the body to reabsorb water and various useful substances while expelling waste substances as urine.

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Answer:

There are many ways to save energy at home some are as following:-

1)Use Led Bulbs rather than Tubelight

2)Using Heater or Air Conditioner uses a lot of energy so we should reduce there usage

3)If possible, install a programmable thermostat to automatically adjust your home's temperature settings when you're away or sleeping.

4)Use a bucket of water rather than taking a shower

5)During Winter season use suns heat to heat up your body rather than using heater at day time

6)Save water by scraping dishes instead of rinsing them before loading in the dishwasher

7)Close the tap when not in use

8)While brushing tour teeth, use utensils to clean your mouth rather than using a tap

9)The water you use to mop the floor can we used to water the plant or even clean your car

10)Dont use dryer to dry your cloth rather put it in under sun

Explanation:

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The correct option regarding sea anemones is (b) i.e. None of the other given options of answer is correct. The order Actiniaria contains several marine creatures, including sea anemones. They resemble anemones, a kind of terrestrial plant, in look and name.

There is no free-swimming medusa stage in sea anemones. Invertebrates of the order Actiniaria that are predatory in the sea include sea anemones. The eggs and sperm produced by the polyp itself are fertilised to create a planula larva. It immediately grows into polyps. They are capable of having both sexual and asexual offspring. They are unable to produce their own food or engage in photosynthesis. As a result, sea anemones and single-celled algae form facultative mutualistic partnerships. The oral disc and tentacles are home to the algae, which are exposed to sunlight and protected from other feeders. The algae provide the sea anemones with food and oxygen. The stinging cells also protect the algae, making it less likely that herbivores would eat them up.

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Answer:

in a fast way

Explanation:

they just do ;-;

A fibroblast is an example of life at the "O" level in the chemical cellular organ system. Fibroblasts are a type of connective tissue cell that plays a crucial role in wound healing and tissue repair. They are found in various organs and tissues throughout the body. Here option D is the correct answer.

At the "O" level, referring to the cellular level, fibroblasts are considered living entities because they possess all the characteristics of life. They are capable of independent metabolic activities, including the synthesis of proteins and other molecules necessary for their function.

Fibroblasts maintain the extracellular matrix, which provides structural support and mechanical integrity to tissues. Although neurons (a), muscle cells (b), and red blood cells (c) are also important components of the organ system, they are not typically classified as fibroblasts.

Neurons are specialized cells responsible for transmitting electrical signals in the nervous system, muscle cells are responsible for contraction and movement, and red blood cells are involved in oxygen transport. Therefore option D is the correct answer.

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Complete question:

Which of the following is an example of life at the "O" level in the chemical cellular organ organ system?

a) Neuron

b) Muscle cell

c) Red blood cell

d) Fibroblast

Answer: 3.2 x 10^ -7

Explanation: move the decimal until there is one number in front of the decimal and then count how many places you moved the decimal and because it becomes a smaller number, the exponent is negative

0.00000032 in scientific notation is 3.2 x 10^(-8).

To convert 0.00000032 into scientific notation, you can follow these steps:

1. Identify the non-zero digit: In this case, the non-zero digit is 3.

2. Count the number of decimal places to the right of the non-zero digit: In this case, there are 8 decimal places to the right.

3. Write the non-zero digit followed by a decimal point: 3.

4. Write the remaining digits without the leading zeros: 2.

5. Multiply the result by 10 raised to the power of the number of decimal places: 3.2 x 10^(-8).

Therefore, 0.00000032 in scientific notation is 3.2 x 10^(-8).

In scientific notation, the number is expressed as a decimal number between 1 and 10 multiplied by a power of 10. This allows us to easily represent very large or very small numbers in a compact and standardized format.

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The level of ecology that is concerned with groups of individuals of different species is called community ecology. It is a subfield of ecology that focuses on the study of interactions between species within an ecosystem. Community ecology studies the structure, composition, and dynamics of biological communities and how they respond to changes in the environment.

Community ecology deals with the interactions among different species in a community and how they influence each other. It focuses on the factors that affect the diversity, abundance, and distribution of species in a community. The interactions among species include predation, competition, mutualism, parasitism, and commensalism.

Community ecology also examines the role of physical and chemical factors such as temperature, water availability, soil type, and nutrients in shaping the community structure.

Community ecology is concerned with both abiotic and biotic factors that affect the interactions among species. Abiotic factors refer to non-living components of the environment such as temperature, water availability, and soil type.

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A depression or groove in the surface of the cerebral cortex is called a sulcus. Sulci play a crucial role in increasing the surface area of the cerebral cortex and facilitating efficient brain functioning.

The cerebral cortex, which is the outermost layer of the brain, has a highly folded appearance to accommodate a large surface area within the limited space of the skull. These folds create ridges called gyri and grooves called sulci. Sulci play a crucial role in increasing the surface area of the cerebral cortex, allowing for more neural connections and enhancing the brain's processing capabilities.

The sulci are not randomly distributed but instead follow consistent patterns and landmarks. They serve as important landmarks for identifying and delineating different regions of the cerebral cortex. By studying the specific sulci and their characteristics, neuroscientists and researchers can map and understand the different functional areas and regions of the brain.

Overall, the sulci contribute to the complexity and efficiency of the brain by providing more surface area for neuronal connections, enabling the sophisticated cognitive abilities and functions that humans possess.

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Answer:

Terrestrial planets include: Mercury, Venus, Earth, and Mars (in order from closest to the sun to farthest from the sun)

Jovian planets include: Jupiter, Saturn, Uranus, and Neptune (in order from closest to the sun to farthest from the sun)

Explanation:

Terrestrial planets have solid surfaces (usually rocky) with a dense metallic core, while Jovian planets are gas giants, meaning that they have no solid surface. Jovian Planets have a large gaseous composition and a small, molten rock core.

Sun

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

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This farming is responsible for organ failure and bad health condition of organism.

Animals get adversely affected by inhumane farming because in this farming animals should treated as a production material not the animals. In inhumane farming methods the animals are reared by giving highly nutritive feed and apply hormones to the animals in order to produce milk and meat in large amount. This farming method affects the health of the animals such as organ failure and lameness.

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The chance of the parents producing an offspring that is heterozygous is 50% or 0.50.

To predict the outcome of a cross between a heterozygous male with a heterozygous female who possess dominant alleles T (straight thumbs) and recessive alleles t (hitchhiker's thumb).

There are four possibilities to consider in this cross (heterozygous male × heterozygous female) and these are TT, Tt, tT, and tt.

The Punnett square below shows these possibilities as follows:

From the above Punnett square, you will see that the possible offspring genotypes are TT, Tt, tT, and tt. Each offspring has a 1 in 4 (25%) chance of having either of the four genotypes. Therefore, the percentage chance of producing a heterozygous offspring from this cross is:

The chance of the parents producing an offspring that is heterozygous is 50% or 0.50.

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Answer:

Explanation:

Darwin's use of many different fields of study including geology, economics, and biology was incredibly important as it allowed him to make connections between them that ultimately led to ground breaking discovery. Such as animals that that migrated to different areas and were interconnected through their geological footprints that were left behind.

Answer:

Darwin's theory of natural selection is important because it enables us to understand the forces driving evolution in living organisms. This evolutionary mechanism may also be used in different research fields ranging from molecular biology to economy.

The evolution theory states that the organisms that are better adapted to the environment have more chances to survive and to reproduce, thereby perpetuating their own genes in future generations. This idea of selection can also be applied to other disciplines. For example, in the economics field, it has been proposed that Darwin's theory may explain why those traits related to morality (such as fairness, honesty and integrity) which are beneficial for one particular group but not for the individual are not selected in real life.

Explanation:

Answer:

It could be any of the following except thymine.

Organ in which alcohol absorption occurs: Stomach and small intestine walls Blood stream Elimination of alcohol from the body: Liver

When a person drinks, the body absorbs alcohol, circulates it, and eventually eliminates it. Below are the organs or systems in the body where each of these steps takes place:

The organ in which alcohol absorption occurs: Alcohol is absorbed by the stomach and small intestine walls.

The bloodstream is where alcohol absorption occurs. The blood circulates throughout the body and transports alcohol from the stomach and small intestines to other parts of the body.

When alcohol enters the bloodstream, it is diluted, making it easier for the liver to break it down and eliminate it.

In addition, when alcohol enters the bloodstream, it may be found in all tissues of the body, including the brain, kidneys, lungs, and heart. The elimination of alcohol from the body: The liver is the primary organ responsible for metabolizing, or breaking down, alcohol.

Alcohol is eliminated from the body by the liver. The liver breaks down alcohol using enzymes that convert it to acetaldehyde, which is a toxic substance. The liver then converts acetaldehyde into acetic acid, which is a less toxic substance. Finally, acetic acid is broken down into carbon dioxide and water, which are eliminated from the body through urine and exhalation.

Organ in which alcohol absorption occurs: Stomach and small intestine walls Blood stream Elimination of alcohol from the body: Liver

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Answer:

Structure.

Explanation:

It has changed its structure. Structure is the correct answer.

Accurate DNA replication depends on the ability of DNA polymerases to discriminate between correctly and incorrectly paired nucleotides.

Answer:

D- The organisms uses most of the energy it takes in to sustain their own life.

Explanation:

Answer:

A virus is a microscopic infectious agent that can only replicate inside the living cells of organisms. It is composed of genetic material, either DNA or RNA, surrounded by a protein coat called a capsid. The capsid is made up of protein subunits called capsomeres, and its shape can be helical, icosahedral, or complex. Some viruses have an outer envelope made up of a lipid membrane that is derived from the host cell membrane and studded with proteins called spikes.

The genetic material of the virus is either single-stranded or double-stranded and can be either linear or circular. Some viruses have additional structures such as enzymes or additional protein layers.

The structure of a virus enables it to invade host cells and take control of the cellular machinery to replicate itself. The spikes on the surface of some viruses allow them to bind to specific receptors on host cells, while the capsid protects the genetic material from being destroyed by enzymes and the host's immune system. Once inside the host cell, the virus hijacks the cellular machinery to replicate itself, leading to the spread of the infection.

Explanation:

Energy requiring metabolic pathways that yield complex molecules from simpler precursors are: anabolic. The correct option is (B).

Anabolic pathways are those metabolic pathways in which simple molecules are combined to form more complex molecules. These pathways require energy, usually in the form of ATP, to drive the chemical reactions that synthesize complex molecules from simpler precursors.

Anabolic pathways play an important role in building the macromolecules needed for cellular structures and functions, such as proteins, nucleic acids, and complex carbohydrates. These pathways are also involved in the storage of energy in the form of glycogen, lipids, and other complex molecules.

Examples of anabolic pathways include protein synthesis, DNA replication, and glycogen synthesis. These pathways are often linked to catabolic pathways, which break down complex molecules into simpler ones and release energy.

Together, anabolic and catabolic pathways maintain the balance of chemical reactions in the cell, allowing it to grow, divide, and carry out its functions.

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Answer:

1. Cobalt,Calcium,strontium

2.Elements in the same period generally have the same number of electron shells in the outermost energy level.
3.elements in the same period are chemically different.

Explanation:

The green anaconda likely uses internal fertilization because they live mostly on dry land. This type of fertilization allows the anaconda to reproduce successfully in its terrestrial habitat, without depending on water for fertilization.

Green anacondas are well adapted to aquatic life. Their nose and eyes are on the top of their heads to help them see and breathe while swimming. Green anacondas reach sexual maturity between the ages of 3 and 4 years. During the dry season, mating takes place from March through May. Males congregate in groups of up to 13 snakes and mate with a single female. They form a "breeding ball," in which the males surround and compete for entrance to the female's cloaca. Females give birth to 20-40 young in the water after sheltering for the remainder of the dry season. While they can swim to hunt for food, their primary habitat is on land, which makes internal fertilization more practical and efficient for reproduction. Additionally, female green anacondas give birth to live young, which is a characteristic of internal fertilization.

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Answer:  The Battles of Lexington and Concord

Explanation: The Battles of Lexington and Concord on 19 April 1775, the famous 'shot heard 'round the world', marked the start of the American War of Independence

I'm learning it yesterday LOL

Answer: Battles of Lexington and Concord

Explanation:I did this quiz if you don’t believe here is the proof