Most viruses with helical capsid symmetry contain _______ as their nucleic acid.
Answers
Most viruses with helical capsid symmetry contain single-stranded RNA (ssRNA) as their nucleic acid.
These viruses are referred to as helical or filamentous viruses due to the arrangement of their nucleocapsid protein subunits, which form a helical structure around the viral genome. Examples of viruses with helical symmetry include the tobacco mosaic virus and the influenza virus. It's worth noting that not all viruses with helical capsid symmetry contain ssRNA; some may have single-stranded DNA (ssDNA) or even double-stranded RNA (dsRNA) as their genetic material. The complementary base pairing between nucleotides allows DNA to have a double-stranded helical structure, with A pairing with T (or U in RNA) and G pairing with C. This complementary base pairing is crucial for DNA replication, where the two strands separate, and each serves as a template for the synthesis of a new complementary strand.
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Related Questions
What is reproductive isolation?Why is it necessary for speciation to occur? Explain one way reproductive isolation might occur.
Answers
Reproductive isolation is a process in which individuals in a population are prevented from reproducing. This isolation can occur in several ways, such as a physical barrier that separated these species into two groups that will reproduce with each other and generate a new species.
Why is it necessary for speciation to occur?Speciation is an essential evolutionary process for the creation of new species. It is worth remembering that from reproductive isolation, the individuals of a population have been differentiating and evolving and in the end, there will be a different species from the initial one. Therefore, speciation is necessary for the emergence of new species.
Explain one way reproductive isolation might occur.Reproductive isolation may occur due to a geographic barrier. In this case, a population is separated by a geographic barrier such as a river, a canyon, or a mountain, thus generating subpopulations that will begin to evolve and adapt in different ways. In the end, we will have different subpopulations, but in the beginning, they were part of the same population.
21. Organisms that survive over others within a population have
that make them more successful.
Please help and no links or bots please and thank you
Answers
Write the complementary DNA strand for the following DNA:ITAGCTACGT
Answers
Nam the part of the alimentary canal where HCI is produced
Answers
Answer:
Parietal cells in the gastric glands in the stomach.
Explanation:
The main constituent of gastric acid is hydrochloric acid produced and that is roduced by parietal cells in the gastric glands in the stomach.
Describe how the body gets rid of unwanted carbon dioxide through the respiratory
system
Answers
Answer:
Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled.
The cell divisions that transform the diploid zygote into a mass of undifferentiated cells that develop as the embryo is called?
Answers
The cell divisions that transform the diploid zygote into a mass of undifferentiated cells that develop as the embryo are called cleavage divisions.
Cleavage divisions are the initial series of cell divisions that occur after fertilization. These divisions rapidly divide the zygote into a cluster of smaller cells known as blastomeres. During cleavage, the size of the cells decreases with each division, while the total number of cells increases.
The purpose of cleavage divisions is to generate a large number of cells in the early stages of embryonic development. These cells are initially undifferentiated and have the potential to develop into various specialized cell types and tissues as the embryo grows. The cleavage divisions set the stage for subsequent processes such as cell differentiation and organogenesis.
Cleavage divisions are characterized by rapid cell divisions without growth in cell size. They are typically driven by the division of the zygote's cytoplasm without significant increase in overall cell volume. The cleavage divisions create a compact mass of cells that eventually form the blastocyst or early embryo, which then continues to develop and differentiate into various tissues and organs throughout embryogenesis.
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Question 24 of 35
Which two statements describe the Mesozoic era?
A. Most of Earth's history took place within this time.
B. Plants began to colonize land during this era.
✓ C. It is also known as the Age of Reptiles.
D. It lasted from about 250 million years ago to 70 million years ago.
Answers
Answer:
C
Explanation:
it was the time to f the dinosaurs and some of the dinosaurs were reptiles
Describe how an adaptation can help an organism survive the changing environment.
Answers
For example, a chameleon has the ability to change its skin color to blend in with its surroundings. This adaptation helps the chameleon avoid predators by making it harder to spot. Another example is the thick fur of a polar bear, which helps it stay warm in the cold Arctic environment.
Adaptations can also help organisms compete for resources. For example, birds that have long beaks are better able to reach nectar in flowers, while birds with short beaks are better able to crack open nuts. This allows each bird to specialize in a different food source, reducing competition for resources.
Finally, adaptations can help organisms cope with changes in their environment. For example, some plants have adapted to survive in dry environments by developing deep roots that can reach water deep underground. This allows them to survive in areas where other plants cannot.
In conclusion, adaptations are essential for the survival of organisms in a changing environment. They allow organisms to better compete for resources, avoid predators, and cope with changes in temperature, rainfall, and other environmental factors. Without adaptations, many species would not be able to survive in their environment.
predict how the rate of cell division would differ between single-celled algae living in a sunny, nutrient-rich pond versus algae living in a shady, nutrient-poor pond. explain why. how could you test your prediction? (hint: think about what stages of the cell cycle are cells when they are actively dividing
Answers
Because the pond's nutrient levels are higher and the development circumstances are greater, the algae cells there would divide more frequently.
what is best Algal toxicity or potential benefitsBoth cyanobacteria and algae are neutral in their own right. Due to their ability to produce the oxygen required to support life, these organisms are crucial to the planet. Algae and cyanobacteria can, however, be harmful to people, animals, and the environment if they develop in large numbers or produce toxins.
In what ways are humans harmed by algae?Injurious algal blooms contain cyanobacteria that really can irritate the skin, lead to gastrointestinal problems, and occasionally create toxins that have a major negative influence on the health of people, animals, and pets. If cyanobacteria get on your skin when swimming or wading, you could be exposed to their toxic effects.
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What produces Earth's magnetic field?
Group of answer choices
the rotation of Earth's core
the movement of Earth's tectonic plates
the pressure of Earth's crust upon the mantle
the bombardment of Earth's atmosphere by solar particles
Answers
Answer:
The rotation of Earth's core
Which term best describes the difference in colors of the birds below?
natural selection
Reproductive maturity
Genetic variation
Genetic drift
Answers
Answer:
Genetic variation
Explanation:
it would either be genetic variation or natural selection but with natural selection, there is usually a reason why a certain color showed up whereas with genetic variation anything can happen.
What does the immune system protect the body against?
Answers
Anatomy of the immune system
There are two main parts of the immune system:
The innate immune system, which you are born with.
The adaptive immune system, which you develop when your body is exposed to microbes or chemicals released by microbes.
These two immune systems work together.
The innate immune system
This is your child's rapid response system. It patrols your child’s body and is the first to respond when it finds an invader. The innate immune system is inherited and is active from the moment your child is born. When this system recognizes an invader, it goes into action immediately. The cells of this immune system surround and engulf the invader. The invader is killed inside the immune system cells. These cells are called phagocytes.
The acquired immune system
The acquired immune system, with help from the innate system, produces cells (antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child's body. It can take several days for antibodies to develop. But after the first exposure, the immune system will recognize the invader and defend against it. The acquired immune system changes throughout your child's life. Immunizations train your child's immune system to make antibodies to protect him or her from harmful diseases.
The cells of both parts of the immune system are made in various organs of the body, including:
Adenoids. Two glands located at the back of the nasal passage.
Bone marrow. The soft, spongy tissue found in bone cavities.
Lymph nodes. Small organs shaped like beans, which are located throughout the body and connect via the lymphatic vessels.
Lymphatic vessels. A network of channels throughout the body that carries lymphocytes to the lymphoid organs and bloodstream.
Peyer's patches. Lymphoid tissue in the small intestine.
Spleen. A fist-sized organ located in the abdominal cavity.
Thymus. Two lobes that join in front of the trachea behind the breastbone.
Tonsils. Two oval masses in the back of the throat.
How do antibiotics help fight infections?
Antibiotics can be used to help your child's immune system fight infections by bacteria. However, antibiotics don’t work for infections caused by viruses. Antibiotics were developed to kill or disable specific bacteria. That means that an antibiotic that works for a skin infection may not work to cure diarrhea caused by bacteria. Using antibiotics for viral infections or using the wrong antibiotic to treat a bacterial infection can help bacteria become resistant to the antibiotic so it won't work as well in the future. It is important that antibiotics are taken as prescribed and for the right amount of time. If antibiotics are stopped early, the bacteria may develop a resistance to the antibiotics and the infection may come back again.
Note: Most colds and acute bronchitis infections will not respond to antibiotics. You can help decrease the spread of more aggressive bacteria by not asking your child’s healthcare provider for antibiotics in these
During ___________, the cell grows, makes a DNA copy, and prepares to split into two cells
Answers
Answer:
Interphase
Explanation:
Easy question!!plss help!!!ASAP!!!
The_________
system transports oxygen and carbon dioxide through the
Body.
Answers
Answer:
circulatory system does that
Answer:
The protein inside (a) red blood cells that carries oxygen to cells and carbon dioxide to the lungs is (b) hemoglobin. Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen. It is the iron in hemoglobin that gives blood its red color.
Explanation:
one reason Mendel chose pea plants for his experiment.
Answers
Answer:
Peas were an ideal choice for Mendel to use because they had easily observable traits there were 7 of which he could manipulate
The main reason why Mendel used a pea plant rather than anything else was because a pea plant had observable traits that could be easily recognized. Seven, in particular, he could manipulate in his experiment. Finally, he would cross-pollinate the peas and study each trait that passed on from one pea to another.
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Classify Each Statement As Describing Primary Productivity In An Aquatic Or Terrestrial Ecosystem, Aquatic Terrestrial Ecologists Measure Plants And Ulgas To Determine Productivity, Ecologists Measure Only Plant Growth To Determine Productivity. Temperature And Water Are The Primary Constraints On Productivity Light And Nutrients Are The Primary Constraints
Answers
The statements describing primary productivity in aquatic ecosystem are: Ecologists Measure Plants And Ulgas To Determine Productivity; Light And Nutrients Are The Primary Constraints.
The statements describing primary productivity in terrestrial ecosystem are: Ecologists Measure Only Plant Growth To Determine Productivity; Temperature And Water Are The Primary Constraints On Productivity
Aquatic ecosystem is formed in the water bodies that may be fresh water or marine. These ecosystems are important because they participate in nutrient recycling, recharge ground water, provide habitat, etc.
Terrestrial Ecosystem is formed in the land. The various terrestrial ecosystems are: tundra, taigas, temperate deciduous forests, tropical rainforests, etc.
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PLEASE HURRY, I'LL GIVE YOU 25 POINTS!
A scientist found a correlation between honeybees and a certain species of flowering plant. When the bee population increases, so does the flowering plant population. And when the flowering plant population decreases so does the bee population. To find out whether each change in population CAUSED the other population to change, what could the scientist do?
A. Investigate the populations of two other species of plants and insects to see if they have a similar correlation.
B. Investigate the populations of the honeybee and plant species in areas where the other species is not present.
C. Have several other scientists examine the data to see if they see the same correlation.
D. Repeat the observations to see if the new data show the same correlation.
Answers
To find out if the change in one population is due to the other population, the scientist can: B. investigate the populations of the honeybee and plant species in areas where the other species is not present.
By doing so, the scientist can see if similar relationships exist between other plant and insect species too. And if that is the case then prove his hypothesis null. If no such relationship is observed between bees and other flowering plant species or the same species of flowering plant and some other insect, then it might confirm his alternative hypothesis. Moreover, he can repeat the observations after doing this to see if the new data also reports the same findings and correlation.Hence, the correct answer is option B.
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Identify the type of energy described in each sentence.
gravitational energy
mechanical energy
chemical energy
electrical energy
thermal energy
nuclear energy
radiant energy
The body stores lipids ingested as fat and uses this energy when needed.
A person’s hat falls off and lands on the ground.
A wave of water pushes a surfer to shore.
A burner on a stove heats up a tea kettle.
A power plant splits atoms to generate power for a city.
A nerve sends an impulse to another nerve.
A plant absorbs the Sun’s rays to start the process of photosynthesis.
Answers
Answer:
chemical energy: The body stores lipids ingested as fat and uses this energy when needed.
gravitational energy: A person’s hat falls off and lands on the ground.
mechanical energy: A wave of water pushes a surfer to shore.
thermal energy: A burner on a stove heats up a tea kettle.
nuclear energy: A power plant splits atoms to generate power for a city.
electrical energy: A nerve sends an impulse to another nerve.
radiant energy: A plant absorbs the Sun’s rays to start the process of photosynthesis.
Explanation:
Four substances (A, B, C, and D) are mixed in a test tube during a chemical reaction. The concentrations of the four substances are measured at 0s and at 100s.
Time (s) [A] (mM) [B] (mM) [C] (mM) [D] (mM)
0 1 5 3 5
100 2 5 1 2
Based on the data, which substance was a product of the chemical reaction?
A.
Substance A
B.
Substance B
C.
Substance C
D.
Substance D
Answers
Answer:
B
Explanation:
On Pearson Connexus
In a chemical reaction, atoms are neither created nor destroyed, therefore the concentrations should be the same.
The substance which can be a possible product of the chemical reaction is substance A. This is because, with the increase in time the concentration of A increases. Thus, the correct option is A.
What is a chemical reaction?A chemical reaction can be defined as the change in the chemical composition of a substance. During a chemical reaction, reactants undergo chemical conversion to form products. These products are different from the reactants on the basis of chemical and physical properties.
During a chemical reaction, with the increase in time the concentration of products increase whereas the concentration of reactants decreases. The rate of a chemical reaction is the rate at which products are formed or the rate at which reactants are consumed.
Therefore, the correct option is A.
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PLSSSS HELP IF YOU TURLY KNOW THISSS
Answers
Which type of cloud is very close to the earth's surface?
FogThe altostartus clouds are found in the upper troposphere
The cirrus clouds are found in the troposphere
The cumulonimbus clouds are found in the lower troposphere...
1. Your friend needs quick energy! What kind of biomoleciste should he eat a lot of? 2. Why? Be specific, what do your cells do with this biomolecule that would help him run? 3. Name two kinds of foods have high amounts of this biomolecule.
Answers
2. The most nutritionally important and abundant monosaccharide is glucose, which is used as the major cell fuel in the human body and can be found unbound in body tissues and fluids. Glucose is the building block of several polysaccharides. Galactose and fructose are also used as cell fuel.
3. Honey, and dried fruits such as apples.
in the diagram below, structure A is labeled in two different types of cells. wich statement gives the best description of structure A?
A. it helps regulate what enters and exits the cell.
B it helps absorb sunlight for both cells
C it converts chemical energy into usable energy for both cells
D. it contains the DNA for both cells
dont just give my the answer btw explain it to me cux then it would just be cheating if I just got an answer with no explanation
Answers
In photosynthesis, carbon dioxide (CO₂) and water (H₂O) combine to form the sugar glucose (C6H12O6) in the following reaction:
6CO₂ + 6H₂O → C6H12O6 + ?
Assuming this equation is balanced, which part is missing from the product side?
(1 point)
O 6 carbon atoms
O 6 oxygen atoms
O 12 hydrogen atoms
12 oxygen atoms
Answers
Answer:
Explanation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + ?
To have a balanced equation there must be the same number on both sides of the equation for each type of atom.
There are 6 carbons on the left and right sides of the equation, so they are balanced.
There are 12 hydrogens on the left and right sides of the equation, so they are balanced.
There are 18 total oxygen atoms on the left side of the equation, but there are 6 oxygen atoms on the right side of the equation.
We need 12 more oxygen atoms on the right side of the equation to have a complete and balanced equation.
Add 12 more oxygen atoms in the form of 6O₂ on the right side of the equation. Now there is a total of 18 oxygen atoms on the left and right sides of the equation.
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
hELp‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️
As the latitude increases in the Earth's Northern Hemisphere, describe how the temperature changes. (Ex: As the latitude increases in the Northern Hemisphere, the temperature increases/decreases.) *
Answers
Answer:
As latitude increases it gets colder and can even snow.
Explanation:
Alright here's the basic explanation. As your latitude increases the colder/snowier it will be and the lower latitude will have warmth, and a lot of sun.
Which phase of interphase is characterized by a period of cell growth and the production of molecules for dna replication?.
Answers
The S phase of interphase is characterized by a period of cell growth and the production of molecules for DNA replication.
During the S phase, the cell is actively growing and synthesizing macromolecules such as proteins, lipids, and carbohydrates. This is necessary for the cell to prepare itself for the next stage of cell division. In addition, the cell is also synthesizing the components necessary for DNA replication. This includes nucleotides, proteins, and enzymes. The proteins are responsible for unwinding the DNA molecule, while the enzymes help to copy the genetic information from one strand of DNA to the other, in a process known as semi-conservative replication.
Once the DNA has been replicated, the cell is ready to move on to the G2 phase. During this phase, the cell continues to synthesize proteins and other macromolecules, as well as synthesizing the components necessary for mitosis. The G2 phase is also the time when the cell can repair any damage to its DNA.
In conclusion, the S phase is a critical period of cell growth and the production of molecules for DNA replication. During this phase, the cell is synthesizing the components necessary for DNA replication, as well as proteins and other macromolecules needed for the next stage of cell division. The S phase is therefore essential for the successful completion of the cell cycle.
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the immune system and the lymphatic system work closely together to protect the body from . the consists of several organs and tissues that are involved in filtering and cleaning the and interstitial fluids of the body. the lymphatic system returns from the tissues of the body back to the . by monitoring the return of these fluids in the of the body, the detects the presence of pathogens. the lymphatic system is also involved in the production and maturation of immune system cells called .
Answers
The immune system and the lymphatic system work closely together to protect the body from harmful pathogens and infections.
Role of the lymphatic system:
The lymphatic system consists of several organs and tissues that are involved in filtering and cleaning the blood and interstitial fluids of the body. The lymphatic system returns excess fluids from the tissues of the body back to the bloodstream. By monitoring the return of these fluids in the lymphatic vessels, the immune system detects the presence of pathogens.
The lymphatic system is also involved in the production and maturation of immune system cells called lymphocytes. Overall, the immune system and the lymphatic system play a vital role in maintaining the body's health and protecting it from various diseases and infections.
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What’s was the purpose of Miller and Urey’s experiment
Answers
Answer:
D
Explanation:
to find out how biological molecules could have first formed
What is the nature of work done by genetic counselors?.
Answers
Answer:
Genetic counselors work as members of a healthcare team, providing risk assessment, education and support to individuals and families at risk for, or diagnosed with, a variety of inherited conditions. Genetic counselors also interpret genetic testing, provide supportive counseling, and serve as patient advocates.
Why is energy lost in a food chain? *
Answers
Answer:
Because as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level
Explanation:
Hope that helps!
which structure of the stomach allows greater distension for food storage?
Answers
The stomach is a vital organ in the digestive system responsible for breaking down food and aiding in digestion. It is designed to accommodate different amounts of food as we eat. Within the stomach, there is a specific structure known as the rugae, which allows for greater distension and food storage.
The stomach is a muscular, J-shaped organ located between the esophagus and the small intestine. Its main functions include mechanical and chemical digestion of food. When we consume a meal, the stomach undergoes a process called distension, where it expands to accommodate the food that enters.
One important structure within the stomach that enables greater distension for food storage is known as the rugae. The rugae are a series of ridges or folds found on the inner lining of the stomach. They are formed by the folds of the stomach's mucosa, the innermost layer.
The rugae serve multiple purposes. Firstly, they increase the surface area of the stomach lining. This expanded surface area allows for more efficient absorption of nutrients and fluids from the digested food. Additionally, the rugae play a crucial role in the stomach's ability to stretch and accommodate varying amounts of food.
When the stomach is empty, the rugae are relatively prominent, forming folds that resemble wrinkles. As food enters the stomach, the rugae stretch and flatten out, allowing the stomach to expand and hold a larger volume of food. This distensibility is essential for the stomach's ability to store food until it can be gradually released into the small intestine for further digestion and absorption.
The rugae's flexibility and capacity for expansion are facilitated by the stomach's muscular layers. The stomach walls consist of three layers of smooth muscle: the inner oblique layer, the middle circular layer, and the outer longitudinal layer. These muscles contract and relax to churn and mix the food with digestive enzymes, while also facilitating the expansion and contraction of the stomach as needed.
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